Lap times across years say as much about the weather as the class. % of FA is each class's best lap as a share of FA's on the same day, so the conditions drop out: 100% is level, less is quicker, and a move in it is the class getting faster or slower against the field.
Closest to the field:FA 100.0% of FA Tyler Hunter, Daytona International Speedway Runoffs 2015 race · SM 127.5% of FA Michael Carter, Mid-Ohio Sports Car Course Runoffs 2016 race · T3 80.1% of FA Mark Drennan, Sonoma Raceway Runoffs 2018 qualifying · AS 113.0% of FA Tom Sloe, Daytona International Speedway Runoffs 2015 qualifying
FASMT3ASsolid race · dashed qualifying · slower is lower
FASMT3ASsolid race · dashed qualifying · each class's best lap as a share of FA's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
2:02.513Dudley Fleck · fastest of 9 · top 5 within 6.9s+1.590s (+1.31%)
2:03.334James French · fastest of 10 · top 5 within 1.4s+0.680s (+0.55%)
158.6John McAleer+1.5 mph (+1.0%)
2:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)
2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)
119.6Wyatt Couch+0.3 mph (+0.3%)
+39.391squal +39.660s
131.9%qual 132.4%
2:27.890Nic Hammann · fastest of 12 · top 5 within 4.0s-0.786s (-0.53%)
2:27.540Scotty B White · fastest of 12 · top 5 within 4.8s-2.358s (-1.57%)
138.4Nic Hammann+0.2 mph (+0.2%)
+24.206squal +25.377s
119.6%qual 120.7%
2:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%)
2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%)
151.0Andrew McDermid-0.6 mph (-0.4%)
+25.137squal +24.398s
120.4%qual 119.9%
54 rule changes (FA: 7, SM: 2, T3: 32, AS: 13)9 weight · 8 tyres & wheels · 6 cars added · 6 suspension & brakes · 4 engine · 4 induction · 2 aero · 2 removed · 5 wording · 8 other · AS Camaro 16+ Spec Line: 1LE front splitter kit permitted, belt tensioner and motor mount parts allowed, spark plug position defined. · AS class adds Pirelli P Zero Trofeo Track as permitted tyre option for competition. · AS class rear trailing arms no longer required to maintain stock length, only to locate rear axle. · AS Ford Mustang GT 4.6L 4-valve regains allowance, minimum weight 3200 lbs. · AS Ford Mustang Coupe GT 05-14 Gen3 Coyote minimum weight increases from 3100 to 3400 lbs. · FA sealed engine teardown: competitors no longer pay reassembly and resealing costs; stewards handle inspection per section 9.3.42. · SM/SMX Mazda rear toe link part number revised from 0000-04-5361426 to 0000-04-5361. · AS GM LM7 5.3L must use full prep Holley carburetor as described in 9.1.6.D.c.1, not specifically 4776. · FA Mazda 13B rotary permits one 48mm or 50mm dual-throat carburetor with 41.5mm venturi or fuel injection with 36mm SIR. · AS EFI engine build sheets add dry sump, header, camshaft, and timing chain tensioner options for LS, LT1, Ford, and Mopar engines. · AS LT1 Camaro engine build sheet added with full specs; LT1 weight 3200 lbs, GTO tire to 275, Mustang weight to 3525 lbs, oil catch tanks now required. · SM/SMX part number 0000-10-6900 replaced with 0000-06-5016-KT in GCR 9.1.7.C.1.j.1.c. · AS Spec Lines reorganized for 2026; detailed chassis, engine, weight, wheelbase, tire and brake specifications moved to main rules and engine build sheets. · AS GM LM7 5.3L gains Edelbrock 71187 intake manifold, MSD 6014 ignition box, Holly 4776 carb option under full prep spec line. · Pro Formula Mazda allows lower intake manifold unrestricted, throttle body increased to 80mm maximum. · T2-T4 adjustable toe links now allow performance alternative bushings and spherical bearings, previously only spherical bearings permitted. · AS Ford Mustang and Mercury Capri with Restricted Prep engines get 61 mm restrictor, down from 64 mm. · FA MZR may use Noor P/N 0088-8-00 intake with AT Power runners; aluminum spacer minimum length 2.200 inches required. · FA Formula 1000 motorcycle-based 4-cycle engine loses maximum compression ratio 14.5:1 limit; current rules apply. · FA Formula 1000 allows carbon fiber external panels, forward-facing gaps, raises undertray to 125mm, allows eight 75×125mm rub blocks, widens diffuser to 110cm with 75mm radius transitions. · T2, T3, T4 now allow under-dash electronics relocation for access after roll cage installation. · T4 Performance clarified: 1-piece alternative rotors permitted only at sizes listed in spec line; alternate brake kits may use matching 1-piece rotors. · AS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft. · AS Cadillac CTS-V 04-07 Restricted Prep minimum weight drops to 3400 lbs. · FA class adds USF Pro 2000 car as permitted model. · T3 and T4 Mazda MX-5 Miata add permitted gearset kit PT#0000-02-6100 to Notes. · T4 MX-5 Miata 19-24 and 16-18, T3 MX-5 16-18 and Global Cup ND1/ND: discontinued DG Motorsports hardtop part #0000-07-5901 removed from permitted list.showhide
AS 2016+ Camaro Spec Line Full Prep #39646otheraddedAS Camaro 16+ Spec Line: 1LE front splitter kit permitted, belt tensioner and motor mount parts allowed, spark plug position defined.
AS Consideration of Pirelli P Zero Trofeo Track for AS Competition #40495tyres & wheelsaddedtyres & wheelsAS class adds Pirelli P Zero Trofeo Track as permitted tyre option for competition.
AS Change in 9.1.6.D.4.d.5 in Suspension Mounting Points #40094suspension & brakesfastersuspension & brakesAS class rear trailing arms no longer required to maintain stock length, only to locate rear axle.
AS Re-Add 4.6L 4v 96-04 Mustang Cobra #40239cars addedaddedAS Ford Mustang GT 4.6L 4-valve regains allowance, minimum weight 3200 lbs.
AS Errors and Omissions #40532weightslowerweightAS Ford Mustang Coupe GT 05-14 Gen3 Coyote minimum weight increases from 3100 to 3400 lbs.
FA Update sealed engine teardown section #40621wordingaddedFA sealed engine teardown: competitors no longer pay reassembly and resealing costs; stewards handle inspection per section 9.3.42.
T3 Porsche 986 Boxster S (00-04) Spec Line Additions for Suspension #40307suspension & brakes
T3 VW DSG Missing in 2015-2018 VW Golf R Spec Line #40304weight
AS Clarification for LM7 Holley Carburetor #40167wordingwordingAS GM LM7 5.3L must use full prep Holley carburetor as described in 9.1.6.D.c.1, not specifically 4776.
FA Motor Classification #40175cars addedaddedFA Mazda 13B rotary permits one 48mm or 50mm dual-throat carburetor with 41.5mm venturi or fuel injection with 36mm SIR.
T3 2015+ Mustang Ecoboost Performance #40036suspension & brakes
T3 Review Spec Lines for Camaro V-6 #40149removed -150 lbs
AS Header Information Update for EFI Engine Build Sheets #39886engineaddedengineAS EFI engine build sheets add dry sump, header, camshaft, and timing chain tensioner options for LS, LT1, Ford, and Mopar engines.
AS Errors and Omissions #39933otherfasterAS LT1 Camaro engine build sheet added with full specs; LT1 weight 3200 lbs, GTO tire to 275, Mustang weight to 3525 lbs, oil catch tanks now required.
SM Part Number Change Request #39914otherunclearSM/SMX part number 0000-10-6900 replaced with 0000-06-5016-KT in GCR 9.1.7.C.1.j.1.c.
AS Re-Organization of AS Spec lines for 2026 #39887wordingwordingAS Spec Lines reorganized for 2026; detailed chassis, engine, weight, wheelbase, tire and brake specifications moved to main rules and engine build sheets.
AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055cars addedaddedAS GM LM7 5.3L gains Edelbrock 71187 intake manifold, MSD 6014 ignition box, Holly 4776 carb option under full prep spec line.
FA Pro Mazda Classification and Performance Enhancement Proposal #39411enginefasterenginePro Formula Mazda allows lower intake manifold unrestricted, throttle body increased to 80mm maximum.
T3 Please change 2011-2014 Mustang V6 Spec Line to 2005-2014 #39558other
T3 Nissan 350Z Weight Request #39598weight -25 lbs
T3 Allow Alt Bushing Material in Toe Links #39607suspension & brakesaddedsuspension & brakesT2-T4 adjustable toe links now allow performance alternative bushings and spherical bearings, previously only spherical bearings permitted.
AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501inductionslowerinductionAS Ford Mustang and Mercury Capri with Restricted Prep engines get 61 mm restrictor, down from 64 mm.
FA Alternate Intake Manifold for MZR #38223inductionaddedinductionFA MZR may use Noor P/N 0088-8-00 intake with AT Power runners; aluminum spacer minimum length 2.200 inches required.
FA Engine Compression Rule Change Request #39302enginefasterengineFA Formula 1000 motorcycle-based 4-cycle engine loses maximum compression ratio 14.5:1 limit; current rules apply.
FA Change Formula 1000 allowances #39608aerofasteraeroFA Formula 1000 allows carbon fiber external panels, forward-facing gaps, raises undertray to 125mm, allows eight 75×125mm rub blocks, widens diffuser to 110cm with 75mm radius transitions.
T3 Request to Allow Spec Mustang to Touring 3 in Appendix M Trim #39196weight -50 lbs
T3 Tire Help for Spec E9X in T3 #39222tyres & wheels
T3 Alternate Placement of Fuse Panel and Electronics Request #39370otheraddedT2, T3, T4 now allow under-dash electronics relocation for access after roll cage installation.
T3 Clarify T4 Brake Rotor Allowance #39503wordingwordingT4 Performance clarified: 1-piece alternative rotors permitted only at sizes listed in spec line; alternate brake kits may use matching 1-piece rotors.
AS 1994 Mustang Spec Line Request #39104engineaddedengineAS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft.
T3 T3 Ecoboost Mustang clarification #39236suspension & brakes
AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbsfasterweightAS Cadillac CTS-V 04-07 Restricted Prep minimum weight drops to 3400 lbs.
FA Re-Consider USF Pro 2000 Car for Formula Atlantic Class #38783cars addedaddedFA class adds USF Pro 2000 car as permitted model.
T3 Make the S2000 Competitive Again #38470tyres & wheels
T3 ND Gearset Request for T4 #39166otheraddedT3 and T4 Mazda MX-5 Miata add permitted gearset kit PT#0000-02-6100 to Notes.
T3 ND Spec Lines Wrong PT#'s #39170removedremovedT4 MX-5 Miata 19-24 and 16-18, T3 MX-5 16-18 and Global Cup ND1/ND: discontinued DG Motorsports hardtop part #0000-07-5901 removed from permitted list.
2:00.923Hans Peter · fastest of 12 · top 5 within 2.4s-0.637s (-0.52%)
2:02.654Hans Peter · fastest of 11 · top 5 within 3.1s+0.864s (+0.71%)
157.0Shane Kennett-3.0 mph (-1.9%)
2:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)
2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)
119.3Francisco Barroso-0.6 mph (-0.5%)
+41.776squal +42.188s
134.1%qual 134.9%
2:28.676Nic Hammann · fastest of 19 · top 5 within 1.8s+3.226s (+2.22%)
2:29.898Marshall Mast · fastest of 19 · top 5 within 2.9s+0.707s (+0.47%)
138.2Marshall Mast-13.0 mph (-8.6%)
+27.244squal +27.753s
122.2%qual 123.0%
2:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%)
2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%)
151.5Andrew McDermid+1.9 mph (+1.3%)
+26.578squal +25.869s
121.7%qual 121.4%
42 rule changes (FA: 3, SM: 4, T3: 24, AS: 11)8 cars added · 4 engine · 4 induction · 4 weight · 3 tyres & wheels · 1 removed · 12 wording · 6 other · T2, T3, T4 spec table header changed from T2 to ET. · AS Ford Mustang GT 5.0 2018- minimum weight reduced to 3525 lbs. · FA Ligier JS F3 front tires change to Hoosier 240/580R13 MS, rear to 300/590R13 MS. · AS Ford Mustang GT 05-14 Restricted Prep Engine gains additional gear ratio option: 3.66, 2.43, 1.69, 1.32, 1.00, .65. · SMX drivers must submit data acquisition files on time or face suspension and $250 fine. · SMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fines, level 2 and 4 may carry $500 fines. · AS Ford Mustang GT 5.0L 15-17 flat plate restrictor reduces from 67mm to 64mm. · AS LS1/LS6 intakes added for 5.3L truck engine: part numbers 12561269 and 88894095. · SM tire marking rules clarified: one Hoosier SM 7.5 P205/50/ZR17 set per Super Tour weekend, impound after first dry session, damaged tires may be replaced with used tires only. · AS Flotek head value seat cutting dimensions figure updated for consistency. · AS class notes cleaned: fuel cell and ECM specifications removed from multiple Camaro, Firebird, Challenger and Mustang variants. · AS removes 'Any ECM maybe used' note from five Cadillac and Chevrolet/Pontiac V8 Restricted Prep models. · FA Formula Renault 2.0 (10-17) spec notes clarified: engine sealed, manual compliance required, tyre choice unrestricted, no alterations except repairs. · FA adds Formula Regional European Championship Tatuus F.3 T-318 or FR-19 as spec line car in Table 2. · Ford SCCA Club Spec Mustang added to T3 at 3350 lbs; Mazda SCCA Club Spec MX-5 added to T4 at 2500 lbs. · AS Ford Mustang and Cobra Coyote engine restrictor increases to 80mm from 67mm or 64mm. · AS Mustang GT 05-14 Restricted loses 300 lbs engine; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively. · AS class: multiple American muscle cars gain additional allowed gear ratio options across model years and prep levels. · AS LS-engine cars gain ECU freedom: CTS-V, Camaro, Firebird (70–02) and Camaro SS may use any ECM. · T2, T3, T4: nine, nine, and thirty-seven expired spec lines removed effective 2025-01-01. · SMX OE instrument cluster must stay unmodified and connected; aftermarket dash allowed if wiring only re-routed; alternate gauges now permitted; foot pedal comfort mods allowed without relocation. · T2, T3 Mustang spec lines remove redundant driveshaft allowance notes across six model year ranges. · T2, T3, T4 fuel cell installations may omit charcoal canisters, emissions valves, and sensors. · T2, T3, T4 brake specifications clarified: 2-piece rotors allowed in T2 within 5% OE diameter, T3 within 2% OEM diameter. · T2, T3, T4 fuel cell installations may remove charcoal canisters, emissions valves, and sensors. · Porsche Spec Boxster moves to T4, minimum weight 2750 lbs, ineligible for Runoffs until 3 Super Tour events. · T4 BMW 320i Spec Line: Turner Motorsports intercooler #024703TMS02 now allowed. · 2005 Cadillac CTS 3.6L 6-speed manual classified in T3 Spec.showhide
T3 Incorrect Touring Heading #38451wordingwordingT2, T3, T4 spec table header changed from T2 to ET.
AS RE: Previous Letter 37695 Update #38245weight -75 lbsfasterweightAS Ford Mustang GT 5.0 2018- minimum weight reduced to 3525 lbs.
FA Ligier JS F3 Tire Choice #38434tyres & wheelstyres & wheelsFA Ligier JS F3 front tires change to Hoosier 240/580R13 MS, rear to 300/590R13 MS.
AS Errors and Omissions #38234otheraddedAS Ford Mustang GT 05-14 Restricted Prep Engine gains additional gear ratio option: 3.66, 2.43, 1.69, 1.32, 1.00, .65.
SM SMX Data Submission - Penalties #38248otheraddedSMX drivers must submit data acquisition files on time or face suspension and $250 fine.
SM Committee) SMX Penaly Clarification updated language #38337wordingwordingSMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fines, level 2 and 4 may carry $500 fines.
AS Errors and Omission #38055inductionslowerinductionAS Ford Mustang GT 5.0L 15-17 flat plate restrictor reduces from 67mm to 64mm.
AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197cars addedaddedAS LS1/LS6 intakes added for 5.3L truck engine: part numbers 12561269 and 88894095.
SM Clarify Tire Marking Regs #38005wordingwordingSM tire marking rules clarified: one Hoosier SM 7.5 P205/50/ZR17 set per Super Tour weekend, impound after first dry session, damaged tires may be replaced with used tires only.
AS Flotek Head Plunge Cut Inconsistencies #37502wordingwordingAS Flotek head value seat cutting dimensions figure updated for consistency.
AS Notes clean up #37693wordingwordingAS class notes cleaned: fuel cell and ECM specifications removed from multiple Camaro, Firebird, Challenger and Mustang variants.
AS Race memo #37902wordingwordingAS removes 'Any ECM maybe used' note from five Cadillac and Chevrolet/Pontiac V8 Restricted Prep models.
FA Update Formula Renault 2.0 spec line notes #37853wordingwordingFA Formula Renault 2.0 (10-17) spec notes clarified: engine sealed, manual compliance required, tyre choice unrestricted, no alterations except repairs.
FA Classify FR European Championship car as spec line car in Table 2 #37658cars addedaddedFA adds Formula Regional European Championship Tatuus F.3 T-318 or FR-19 as spec line car in Table 2.
T3 Request to Classify Club Spec in Appropriate Touring Classes #37523cars addedaddedFord SCCA Club Spec Mustang added to T3 at 3350 lbs; Mazda SCCA Club Spec MX-5 added to T4 at 2500 lbs.
AS Increase Coyote Engine Restrictor to 80mm #36177enginefasterengineAS Ford Mustang and Cobra Coyote engine restrictor increases to 80mm from 67mm or 64mm.
AS Performance Pack for 2015+ Mustang #36867enginefasterengineAS Mustang GT 05-14 Restricted loses 300 lbs engine; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively.
AS Gear Ratios #37131otheraddedAS class: multiple American muscle cars gain additional allowed gear ratio options across model years and prep levels.
AS ECU specs for LS engine #37208engineaddedengineAS LS-engine cars gain ECU freedom: CTS-V, Camaro, Firebird (70–02) and Camaro SS may use any ECM.
T3 Remove spec lines that have expired #37269removedremovedT2, T3, T4: nine, nine, and thirty-seven expired spec lines removed effective 2025-01-01.
T3 Request to Move Spec Mustang to Touring 3 (from T2) #37080cars added
SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070wordingwordingSMX OE instrument cluster must stay unmodified and connected; aftermarket dash allowed if wiring only re-routed; alternate gauges now permitted; foot pedal comfort mods allowed without relocation.
T3 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484wordingwordingT2, T3 Mustang spec lines remove redundant driveshaft allowance notes across six model year ranges.
T3 Fuel Emissions Components #37076otheraddedT2, T3, T4 fuel cell installations may omit charcoal canisters, emissions valves, and sensors.
T3 fix brake wording #37129wordingwordingT2, T3, T4 brake specifications clarified: 2-piece rotors allowed in T2 within 5% OE diameter, T3 within 2% OEM diameter.
T3 Evaporative emissions systems #37130otheraddedT2, T3, T4 fuel cell installations may remove charcoal canisters, emissions valves, and sensors.
T3 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision #37140other
T3 Move Spec Boxster to T4 #37158cars addedaddedPorsche Spec Boxster moves to T4, minimum weight 2750 lbs, ineligible for Runoffs until 3 Super Tour events.
T3 BMW 320i Spec Line #37204engineaddedengineT4 BMW 320i Spec Line: Turner Motorsports intercooler #024703TMS02 now allowed.
T3 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars addedadded2005 Cadillac CTS 3.6L 6-speed manual classified in T3 Spec.
2:01.560Hans Peter · fastest of 13 · top 5 within 2.0s-2.714s (-2.18%)
2:01.790Dudley Fleck · fastest of 12 · top 5 within 3.3s-2.956s (-2.37%)
160.0Brandon Schwarz+9.4 mph (+6.3%)
2:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)
2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)
119.9Alex Bertagnoli-1.4 mph (-1.2%)
+39.696squal +39.546s
132.6%qual 132.5%
2:25.450Scotty B White · fastest of 22 · top 5 within 4.5s-4.307s (-2.88%)
2:29.191Marshall Mast · fastest of 21 · top 5 within 1.8s-2.497s (-1.65%)
151.2Scotty B White+13.1 mph (+9.5%)
+27.401squal +23.890s
122.5%qual 119.7%
2:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%)
2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%)
149.6Gregory Eaton+0.4 mph (+0.3%)
+24.639squal +25.018s
120.2%qual 120.6%
56 rule changes (SM: 4, T3: 41, AS: 11)15 cars added · 7 induction · 5 weight · 4 suspension & brakes · 3 engine · 3 tyres & wheels · 1 aero · 6 wording · 12 other · AS Mustang GT 05-14 Restricted Prep and 2018- gain alternate transmission ratio options. · SMX Spec MX-5 camera requirement: non-functioning recorder now will instead of may warrant penalty or disqualification. · SM and SMX must run latest AIM Data Logger Spec MX-5 ECU Protocol, effective 2024-09-01. · SMX Mazda MX-5 OE versus OEM definitions clarified in GCR section 9.1.7.1; wording change only. · SM and SMX now allow an alternate shifter bushing at the bottom of the shift lever. · T2 Mustang GT 5.0L 15-17 and 2018- now permit Track/Performance Package parts; T3 V6 15-17 clarified to allow Track/Performance package. · T2-T4 Ford Mustangs: remove 25 lb penalty for non-OEM driveshaft, clarify alternate driveshaft allowance. · Audi S4 (2000–2002) classified in T3 with 2671cc, 3400 lbs minimum weight, 38mm restrictor, allowing 800lb springs and intercooler. · AS adds 2018-23 Ford Mustang GT 5.0L at 3600 lbs, 275 tire, 60mm restrictor, optional Brembo front brakes. · AS Chevrolet Camaro 1LE (2016-) added with 3600 lbs minimum weight, 275 tires, 60mm restrictor, 345/338mm brakes. · AS Chevrolet/Pontiac Camaro & Firebird 82–92 5.7L LS1 classified: 3200 lbs, 13.1×1.27 disc brakes, 17 in max wheel, 65 mm restrictor, SLP intake lid permitted. · AS Chevrolet Camaro, Firebird, and Ford Mustang now permit Flo Tek cylinder heads in multiple generations. · T3 and T4 Mazda RX-8 may remove or disable factory oil injection system. · T2, T3, T4 driveshafts may use carbon fiber, aluminum, or steel; two-piece replaced with one-piece; non-OEM adds 25 lbs. · AS Camaro, Firebird 93-02 and GTO 04-06 add approved LS1 connecting rod part numbers to Notes. · AS Cadillac CTS-V, Chevy Camaro SS V8, Dodge Challenger, Ford Mustang GT 5.0L, Pontiac GTO allowed 11" wheels until 3/1/25. · Chevrolet Camaro, Pontiac Firebird 70–81 Full Prep classified in AS at 3400–3600 lbs with 108.0 wheelbase, specific head castings, and suspension modifications permitted. · AS class adds fuel cell location notes to multiple Cadillac, Chevrolet, Dodge and Ford models: cells within 24 inches of standard tank. · Chevrolet Camaro 6th gen Full Prep added to AS class at 3400 lbs base or 3600 lbs with built engine. · AS class: Ford Mustang GT 05-14 Restricted prep added; Cadillac CTS-V 04-07 to 3450 lbs; Camaro/Firebird variants reconfigured with weight and notes changes; Dodge Challenger 08-20 restrictor 76mm to 80mm; Ford Mustang variants updated wei… · T2, T3, T4 Spec Lines remove wheelbase requirement, add Required Restrictor specification. · T2 and T3 Nissan 370Z front brake rotors increase to 355×32 mm, rears to 350×20 mm. · T3 Volkswagen Golf R 15-18 max wheel width increases to 9 inches, max tyre size to 255. · T2, T3, T4 battery replacement no longer allows alternate manufacturer batteries within 10% OEM weight. · T3 Ford Mustang V6 11-14 adds strut tower brace M20201-F and sway bar kits M-5490 or AR3Z-16A200-A options. · T4 now allows C-Spec touring cars to compete, in addition to existing B-Spec eligibility. · T2, T3, T4 spec lines expire 12/31/24; submit to appeal or cars are removed from class. · T3 Pontiac Solstice front brake rotor increases from 296 to 355 mm vented. · T3 Nissan 350Z DE motor minimum weight drops 75 lbs to 3125; HR motor restrictors increase from 44mm to 47mm. · T3 Nissan 370Z now includes model years 2009–2022 with Nismo editions. · T3 2010 Mustang GT 4.6 permitted to update front and rear fascia, hood and associated assemblies to 2013-14 GT style. · T3 BMW SpecE46 minimum weight drops 50 lbs to 2850. · T3 Subaru WRX STI 03-07 and Legacy GT 05-09 turbo inlet restrictor increased to 39-40mm; STI 15-20 weight raised 100 lbs to 3450. · T3 Porsche Cayman 09-12 and 13-16 gear ratios and final drive ratios specified; 09-12 6-speed final drive changed to 3.875, PDK to 3.250; 13-16 6-speed final drive stays 3.89, PDK to 3.250. · T3 Volkswagen GTI Jetta GLI 06-10 turbo inlet restrictor increases from 36mm to 37mm. · T3 Volkswagen Golf R permitted model years extended from 15-16 to 15-18. · T3 VW Golf R 15-16 permits Verkline WAS-048 camber arms. · T3 Spec E9X BMW added with 2975 lbs minimum weight, spec tyre or DOT up to 225, no runoffs until three Super Tours. · T3 VW GTI 2013 and Golf R 15-16: Turbo Inlet Restrictor specification clarified to 36 mm required, maximum 60 mm from impeller.showhide
AS Mustang transmission ratios #36662otheraddedAS Mustang GT 05-14 Restricted Prep and 2018- gain alternate transmission ratio options.
SM SMX Camera Rule Correction #36496wordingwordingSMX Spec MX-5 camera requirement: non-functioning recorder now will instead of may warrant penalty or disqualification.
SM Committee) AIM ECU Protocol #36556engineaddedengineSM and SMX must run latest AIM Data Logger Spec MX-5 ECU Protocol, effective 2024-09-01.
SM Committee) OE versus OEM Definitons #36608wordingwordingSMX Mazda MX-5 OE versus OEM definitions clarified in GCR section 9.1.7.1; wording change only.
SM Committee) Shifter Bushing #36611otheraddedSM and SMX now allow an alternate shifter bushing at the bottom of the shift lever.
T3 Mustang T2/T3 #35877cars addedaddedT2 Mustang GT 5.0L 15-17 and 2018- now permit Track/Performance Package parts; T3 V6 15-17 clarified to allow Track/Performance package.
T3 T2-T4 Driveshaft Mistake...? #36050weightfasterweightT2-T4 Ford Mustangs: remove 25 lb penalty for non-OEM driveshaft, clarify alternate driveshaft allowance.
T3 E&O: #35174 (Derek Chan) 350Z Parity Request #36116induction
T3 B8/8.5 Audi S4 T3 and T2 #36195cars addedaddedAudi S4 (2000–2002) classified in T3 with 2671cc, 3400 lbs minimum weight, 38mm restrictor, allowing 800lb springs and intercooler.
AS Request for Classification of 2018-2023 mustang In #35764cars addedaddedAS adds 2018-23 Ford Mustang GT 5.0L at 3600 lbs, 275 tire, 60mm restrictor, optional Brembo front brakes.
AS 6th gen Camaro limited prep #35733cars addedaddedAS Chevrolet Camaro 1LE (2016-) added with 3600 lbs minimum weight, 275 tires, 60mm restrictor, 345/338mm brakes.
AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK #35825cars addedaddedAS Chevrolet/Pontiac Camaro & Firebird 82–92 5.7L LS1 classified: 3200 lbs, 13.1×1.27 disc brakes, 17 in max wheel, 65 mm restrictor, SLP intake lid permitted.
AS Full Prep Head #35891engineaddedengineAS Chevrolet Camaro, Firebird, and Ford Mustang now permit Flo Tek cylinder heads in multiple generations.
T3 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engineaddedengineT3 and T4 Mazda RX-8 may remove or disable factory oil injection system.
T3 Driveshafts #35916weightslowerweightT2, T3, T4 driveshafts may use carbon fiber, aluminum, or steel; two-piece replaced with one-piece; non-OEM adds 25 lbs.
AS Restricted Prep Aftermarket Parts Request #35682otheraddedAS Camaro, Firebird 93-02 and GTO 04-06 add approved LS1 connecting rod part numbers to Notes.
AS Allowance of 11 #35824tyres & wheelsfastertyres & wheelsAS Cadillac CTS-V, Chevy Camaro SS V8, Dodge Challenger, Ford Mustang GT 5.0L, Pontiac GTO allowed 11" wheels until 3/1/25.
AS Request to Classify 1970-1981 Camaro and Firebird in AS #33659cars addedaddedChevrolet Camaro, Pontiac Firebird 70–81 Full Prep classified in AS at 3400–3600 lbs with 108.0 wheelbase, specific head castings, and suspension modifications permitted.
AS Fuel Cell 12 #34194otheraddedAS class adds fuel cell location notes to multiple Cadillac, Chevrolet, Dodge and Ford models: cells within 24 inches of standard tank.
AS Please Classify the 6th Gen Into AS. #35448cars addedaddedChevrolet Camaro 6th gen Full Prep added to AS class at 3400 lbs base or 3600 lbs with built engine.
AS spec lines #35713otherunclearAS class: Ford Mustang GT 05-14 Restricted prep added; Cadillac CTS-V 04-07 to 3450 lbs; Camaro/Firebird variants reconfigured with weight and notes changes; Dodge Challenger 08-20 restrictor 76mm to 80mm; Ford Mustang variants updated wei…
T3 370Z Brake Rotor Size Correction #35487suspension & brakessuspension & brakesT2 and T3 Nissan 370Z front brake rotors increase to 355×32 mm, rears to 350×20 mm.
T3 15-18 Golf R Alignment with Existing GTI and R Speclines #35235tyres & wheelsfastertyres & wheelsT3 Volkswagen Golf R 15-18 max wheel width increases to 9 inches, max tyre size to 255.
T3 More Car Lightening Stuff #35319wordingremovedT2, T3, T4 battery replacement no longer allows alternate manufacturer batteries within 10% OEM weight.
T3 Open Strut Tower Brace Options for Ford Mustang V6 (11-14) #35322aeroaddedaeroT3 Ford Mustang V6 11-14 adds strut tower brace M20201-F and sway bar kits M-5490 or AR3Z-16A200-A options.
T3 Inclusion of B-C spec cars in T4 #35374cars addedaddedT4 now allows C-Spec touring cars to compete, in addition to existing B-Spec eligibility.
T3 T2-T4 Set expiration dates on spec lines #35378wordingremovedT2, T3, T4 spec lines expire 12/31/24; submit to appeal or cars are removed from class.
T3 T3 Solstice Brakes #35106suspension & brakessuspension & brakesT3 Pontiac Solstice front brake rotor increases from 296 to 355 mm vented.
T3 350Z Parity Request #35174weightfasterweightT3 Nissan 350Z DE motor minimum weight drops 75 lbs to 3125; HR motor restrictors increase from 44mm to 47mm.
T3 Requested Update of Model Years of 370Z #35231cars addedaddedT3 Nissan 370Z now includes model years 2009–2022 with Nismo editions.
T3 Update Request for 2010 Mustang GT 4.6 #35234cars addedaddedT3 2010 Mustang GT 4.6 permitted to update front and rear fascia, hood and associated assemblies to 2013-14 GT style.
T3 SE46 Continued Parity/ Cold Air Intake request #35267weight -50 lbsfasterweightT3 BMW SpecE46 minimum weight drops 50 lbs to 2850.
T3 Please help the Subaru STIs. #35278induction +100 lbsfasterinductionT3 Subaru WRX STI 03-07 and Legacy GT 05-09 turbo inlet restrictor increased to 39-40mm; STI 15-20 weight raised 100 lbs to 3450.
T3 Porsche Cayman Transmissions and Ratios #34891wordingunclearT3 Porsche Cayman 09-12 and 13-16 gear ratios and final drive ratios specified; 09-12 6-speed final drive changed to 3.875, PDK to 3.250; 13-16 6-speed final drive stays 3.89, PDK to 3.250.
T3 2006-10 Volkswagen GTI - Weight Reduction request and KO4 Turbo #34414inductionfasterinductionT3 Volkswagen GTI Jetta GLI 06-10 turbo inlet restrictor increases from 36mm to 37mm.
T3 Adding Model Years to T3 Golf R Spec Line #34612cars addedaddedT3 Volkswagen Golf R permitted model years extended from 15-16 to 15-18.
T3 Rear Camber Arms for T3 VW Golf R #34613suspension & brakesaddedsuspension & brakesT3 VW Golf R 15-16 permits Verkline WAS-048 camber arms.
T3 Classing Spec E90 Cars in SCCA #34791cars addedaddedT3 Spec E9X BMW added with 2975 lbs minimum weight, spec tyre or DOT up to 225, no runoffs until three Super Tours.
T3 TIR location requirement in VW Golf Spec lines #35048wordingwordingT3 VW GTI 2013 and Golf R 15-16: Turbo Inlet Restrictor specification clarified to 36 mm required, maximum 60 mm from impeller.
2:14.986Danny Steyn · fastest of 52 · top 5 within 0.1s+0.322s (+0.24%)
2:16.229Julian DaCosta · fastest of 46 · top 5 within 0.3s-2.878s (-2.07%)
120.3Jim Drago+1.1 mph (+0.9%)
2:04.520Steve Ott · fastest of 18 · top 5 within 1.9s+0.297s (+0.24%)
2:05.854Chris Hart · fastest of 18 · top 5 within 1.8s-21.772s (-14.75%)
139.1Jason Ott-1.1 mph (-0.8%)
2:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%)
2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%)
154.6James Jost+3.7 mph (+2.5%)
40 rule changes (FA: 7, SM: 1, T3: 28, AS: 4)8 cars added · 8 weight · 4 tyres & wheels · 3 suspension & brakes · 2 induction · 1 aero · 8 wording · 6 other · AS crate motor part number specification clarified; both CT400 P/N-19370604 and 19370604 engine assemblies permitted for GM vehicles. · AS Ford Mustang GT 5.0L (15-17) Restricted maximum wheel diameter increases to 19.0 inches. · AS Dodge Challenger 5.7L/6.1L/6.4L V8 allows alternate front upper control arms; SPC-66045 spec part removed. · AS Dodge Challenger 5.7L/6.1L/6.4L V8 now allows alternate front brake calipers with adaptor brackets for component compatibility. · T3 adds 2012-2013 Volkswagen Golf R, 1984cc, 3050–3080 lbs, 36mm turbo restrictor, 18×9 wheels, 255 tyres. · Mazda RX-8 T3 and T4 transmission and final drive pairing requirement removed; T4 gains Mazdaspeed radiator, spring kit, restrictor, spoiler, air dam. · T3 BMW 320i 14–15 gains aftermarket intercooler; T4 BMW 320i 14–15 loses it. · T3 Nissan 350Z and 370Z maximum tire width increased from 245 to 255. · T3 and T2 Pontiac Solstice GXP 07-09 minimum ride height set to 3 inches. · T3 Camaro V6 1LE and LT-I4 Turbo 1LE max wheel diameter rises from 18 to 20 inches. · T3 removes Toyota 2022-up GR Cup and 2022-up GR86 Cup entirely from class. · FA Pro Formula Mazda front wheel width minimum raised to 10 inches, rear to 14 minimum and 15 maximum. · T3 Ford Mustang V6 15-17 gets 75 lb weight break to 3400, stiffer sways to 38/28 mm, and reduced brake penalties to +100/+50 lb. · T3 BMW SpecE46 minimum weight drops 50 lbs, to 2900. · T3 adds 2022-up Toyota GR Cup and GR86 Cup, both 2387cc, 2700 lbs, 18x8 wheels, Continental 245/620R18 slicks. · FA Pro Formula Mazda maximum bodywork width behind front wheels increases to 51.97 inches, from 51.17 inches. · FA MSR Formula Mazda FMzR added to Table 2 classification. · T3 BMW Spec E46 minimum weight reduced 25 lbs to 2925. · T3 BMW 323Ci/Is 98-00 minimum weight reduces to 2750 lbs. · T3 BMW SpecE46 must conform to SpecE46 rules Version 2.10, up from 2.7. · T3 Volkswagen GTI, Jetta GLI 06-10 now allows performance alternative intercooler. · T3 Porsche Spec Boxster tire rules updated: 2016 SPB rules requirement replaced with Current SPB rules or any 245 DOT tire. · T3 Volkswagen GTI, Jetta GLI 06-10 adds permitted OEM steering knuckles 3C0407253F (L) and 3C0407254F (R). · T3 BMW 320I now permitted to use an aftermarket intercooler. · Porsche Cayman 13-16 classified in T3 at 3225 lbs minimum weight, 2700 cc, 18×9 wheels, 245 tyres. · T2 and T3 Mustang 11-14 may remove upper grille fog lights, replace with mesh or screen. · T3 Hyundai Veloster Turbo 2018-2021 added with 1584cc engine, 3050 lbs minimum weight, 245 max tire, specific intake, radiator, shocks, brakes, swaybar allowed. · T3 Volkswagen GTI and Jetta GLI now permit Verkline WAS-048 adjustable rear camber arms. · Unable to complete: rule text does not show the spec line to be added to FA Table 1 for BDA displacement. · SM Mazda MX-5 Miata 01-05 minimum weight rises to 2450 lbs, or 2465 with alternate bore. · T3 Nissan 350Z and 370Z remove specific SPC upper control arm part numbers, permit performance alternatives instead. · T3 350Z rear wheel widens to 18×10, weight cuts 50–75 lbs, restrictor opens to 44mm. 370Z rear wheel widens to 19×10, weight cuts 100 lbs. · T3 Ford Mustang EcoBoost 2015- throttle inlet restrictor increases from 34mm to 35mm TIR. · T5 touring class added; T2-T5 cars may race one class up; T5 maximum tyre width 225 with minimum aspect ratio 45. · T2-T5 Touring front and rear suspension maximum negative camber clarified to 3.5 degrees. · Formula Renault 2.0 (10-17) reclassified from FX to FA spec line; minimum weight reduced 1300 to 1280 lbs, restrictor removed. · FA Swift 016 2.3L Mazda Duratec restrictor increases to 32mm, minimum weight drops to 1420 lbs. · T3 Solstice GXP gains hardtop, suspension, spoiler, Cobalt brakes, aftermarket top, intercooler alternatives, and 4-piston calipers. · Pro Formula Mazda allows street or bridge port, unmodified OEM lower intake manifold, 70mm throttle body, wing height to 99cm, bodywork width to 132cm. · T3 Subaru BRZ 2022- minimum weight rises 225 lbs to 2975; spring rate to 1000 F/R; tower brace, control arms, intake allowed; brake parts penalty removed.showhide
AS Crate Motor Part Numbers #32944wordingwordingAS crate motor part number specification clarified; both CT400 P/N-19370604 and 19370604 engine assemblies permitted for GM vehicles.
AS Request wheel size change #33007tyres & wheelsfastertyres & wheelsAS Ford Mustang GT 5.0L (15-17) Restricted maximum wheel diameter increases to 19.0 inches.
AS Alternative Upper Front Control Arms for Dodge Challenger #33352wordingwordingAS Dodge Challenger 5.7L/6.1L/6.4L V8 allows alternate front upper control arms; SPC-66045 spec part removed.
AS Front Brake Caliper Adapters for Dodge Challenger #33353otherotherAS Dodge Challenger 5.7L/6.1L/6.4L V8 now allows alternate front brake calipers with adaptor brackets for component compatibility.
T3 2012-2013 Golf R - added to T3 #34413cars addedaddedT3 adds 2012-2013 Volkswagen Golf R, 1984cc, 3050–3080 lbs, 36mm turbo restrictor, 18×9 wheels, 255 tyres.
T3 Rules Clarification for Mazda RX8 Spec Line #34395wordingwordingMazda RX-8 T3 and T4 transmission and final drive pairing requirement removed; T4 gains Mazdaspeed radiator, spring kit, restrictor, spoiler, air dam.
T3 rule book corrections #34437otheraddedT3 BMW 320i 14–15 gains aftermarket intercooler; T4 BMW 320i 14–15 loses it.
T3 Allowing 255 Tire Width for Nissan 350z #34471tyres & wheelsfastertyres & wheelsT3 Nissan 350Z and 370Z maximum tire width increased from 245 to 255.
T3 Ride Height Correction for the T3 Solstice. #34615suspension & brakessuspension & brakesT3 and T2 Pontiac Solstice GXP 07-09 minimum ride height set to 3 inches.
T3 2016+ Camaro 1LE - Max Wheel Diameter #34003tyres & wheelsfastertyres & wheelsT3 Camaro V6 1LE and LT-I4 Turbo 1LE max wheel diameter rises from 18 to 20 inches.
T3 2022 Toyota GR Cup for T3 #34448cars addedremovedcars addedT3 removes Toyota 2022-up GR Cup and 2022-up GR86 Cup entirely from class.
FA Simplify Pro Formula Mazda wheel allowance #34190tyres & wheelsslowertyres & wheelsFA Pro Formula Mazda front wheel width minimum raised to 10 inches, rear to 14 minimum and 15 maximum.
T3 S550 Reconcile With S197 #34093weight -75 lbsfasterweightT3 Ford Mustang V6 15-17 gets 75 lb weight break to 3400, stiffer sways to 38/28 mm, and reduced brake penalties to +100/+50 lb.
T3 SE46 Parity Help #34178weight -50 lbsfasterweightT3 BMW SpecE46 minimum weight drops 50 lbs, to 2900.
T3 2022 Toyota GR Cup for T3 discussion #34234cars addedaddedT3 adds 2022-up Toyota GR Cup and GR86 Cup, both 2387cc, 2700 lbs, 18x8 wheels, Continental 245/620R18 slicks.
FA E&O - Correct Pro Formula Mazda spec line dimensional equivalent #34085wordingwordingFA Pro Formula Mazda maximum bodywork width behind front wheels increases to 51.97 inches, from 51.17 inches.
FA Add new spec line for MSR Formula Mazda FMzR to Table 2 #34139cars addedaddedFA MSR Formula Mazda FMzR added to Table 2 classification.
T3 Request Spec E46 in T3 Weight Adjustment #33897weight -25 lbsfasterweightT3 BMW Spec E46 minimum weight reduced 25 lbs to 2925.
T3 E36 2.5L 323is Weight Reduction #33975weightfasterweightT3 BMW 323Ci/Is 98-00 minimum weight reduces to 2750 lbs.
T3 Update SpecE46 Spec Line to Current SpecE46 Ruleset #34016wordingunclearT3 BMW SpecE46 must conform to SpecE46 rules Version 2.10, up from 2.7.
T3 Request to all ECS Tuning inner-cooler to 06-10 VW GTI spec #33769otheraddedT3 Volkswagen GTI, Jetta GLI 06-10 now allows performance alternative intercooler.
T3 T3 Boxster S GCR request #33687wordingwordingT3 Porsche Spec Boxster tire rules updated: 2016 SPB rules requirement replaced with Current SPB rules or any 245 DOT tire.
T3 OEM VW Steering Spindle Replacements 06-10 VW GTI and Jetta #33732otheraddedT3 Volkswagen GTI, Jetta GLI 06-10 adds permitted OEM steering knuckles 3C0407253F (L) and 3C0407254F (R).
T3 BMW 320I intercooler #33762otheraddedT3 BMW 320I now permitted to use an aftermarket intercooler.
T3 Request to classify 2014 Base Cayman #33159cars addedaddedPorsche Cayman 13-16 classified in T3 at 3225 lbs minimum weight, 2700 cc, 18×9 wheels, 245 tyres.
T3 Mustang OEM Grill Request #33333aeroaddedaeroT2 and T3 Mustang 11-14 may remove upper grille fog lights, replace with mesh or screen.
T3 Hyundai Classification #33498cars addedaddedT3 Hyundai Veloster Turbo 2018-2021 added with 1584cc engine, 3050 lbs minimum weight, 245 max tire, specific intake, radiator, shocks, brakes, swaybar allowed.
T3 Adjustable Rear Camber Arms for VW (All Generations) #33572suspension & brakesaddedsuspension & brakesT3 Volkswagen GTI and Jetta GLI now permit Verkline WAS-048 adjustable rear camber arms.
FA BDA Displacement #33431otherunclearUnable to complete: rule text does not show the spec line to be added to FA Table 1 for BDA displacement.
SM BOP for NB1 and NB2 #32309weightslowerweightSM Mazda MX-5 Miata 01-05 minimum weight rises to 2450 lbs, or 2465 with alternate bore.
T3 350z SPC Upper Control Arm Safety Concerns #33020suspension & brakesremovedsuspension & brakesT3 Nissan 350Z and 370Z remove specific SPC upper control arm part numbers, permit performance alternatives instead.
T3 Request Help for 350z #33379weight -100 lbsfasterweightT3 350Z rear wheel widens to 18×10, weight cuts 50–75 lbs, restrictor opens to 44mm. 370Z rear wheel widens to 19×10, weight cuts 100 lbs.
T3 Ecoboost Acknowledgement #33506inductionfasterinductionT3 Ford Mustang EcoBoost 2015- throttle inlet restrictor increases from 34mm to 35mm TIR.
T3 Touring (T2-T5) Category #33617cars addedaddedT5 touring class added; T2-T5 cars may race one class up; T5 maximum tyre width 225 with minimum aspect ratio 45.
T3 ENO 9.1.9.2.D.1.e.1.a. #33651wordingwordingT2-T5 Touring front and rear suspension maximum negative camber clarified to 3.5 degrees.
FA Reclassify 2010-2017 Formula Renault 2.0 as a spec line car in FA #33395weightfasterweightFormula Renault 2.0 (10-17) reclassified from FX to FA spec line; minimum weight reduced 1300 to 1280 lbs, restrictor removed.
FA Change Swift 016 2.3L restrictor size and minimum weight #33472induction -30 lbsfasterinductionFA Swift 016 2.3L Mazda Duratec restrictor increases to 32mm, minimum weight drops to 1420 lbs.
T3 Solstice GXP in T3 #33501cars addedaddedT3 Solstice GXP gains hardtop, suspension, spoiler, Cobalt brakes, aftermarket top, intercooler alternatives, and 4-piston calipers.
FA Pro Formula Mazda Dimension E&O #33160wordingwordingPro Formula Mazda allows street or bridge port, unmodified OEM lower intake manifold, 70mm throttle body, wing height to 99cm, bodywork width to 132cm.
T3 Another 2022 BRZ/86 T3 request #32945weight +225 lbsslowerweightT3 Subaru BRZ 2022- minimum weight rises 225 lbs to 2975; spring rate to 1000 F/R; tower brace, control arms, intake allowed; brake parts penalty removed.
1:44.703Chip Romer · fastest of 7 · top 5 within 4.0s+3.158s (+3.11%)
1:48.507Alex Mayer · fastest of 4 · top 4 within 4.2s+5.400s (+5.24%)
154.6Austin Hill-1.4 mph (-0.9%)
2:14.664Danny Steyn · fastest of 60 · top 5 within 0.2s+0.112s (+0.08%)
2:19.107Travis Wiley · fastest of 58 · top 5 within 0.9s+2.648s (+1.94%)
119.2Jonathan Neudorf-0.6 mph (-0.5%)
+30.600squal +29.961s
128.2%qual 128.6%
2:04.223Jason Ott · fastest of 20 · top 5 within 2.1s-0.695s (-0.56%)
2:27.626Marshall Mast · fastest of 19 · top 5 within 4.1s+22.272s (+17.77%)
140.2Jason Ott+2.0 mph (+1.4%)
+39.119squal +19.520s
136.1%qual 118.6%
2:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%)
2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%)
150.9James Jost-3.0 mph (-2.0%)
+16.071squal +17.459s
114.8%qual 116.7%
48 rule changes (FA: 7, SM: 1, T3: 31, AS: 9)11 cars added · 9 weight · 4 suspension & brakes · 3 engine · 2 aero · 2 tyres & wheels · 14 wording · 3 other · AS adds Hoosier W2 wet tyre option alongside R7, R6, WET/H20. · AS Dodge Challenger 08-20 gains two transmission ratio options: 2.97–0.50 or 2.26–0.63. · T3 Honda S2000 00-09 now permits OEM, Mugen P/N 0000-04-2312, or aftermarket hardtop retaining OEM roof silhouette with positive fasteners. · T3 Pontiac Solstice GXP Coupe/Convertible 07-09 tire runout increases from 35mm to 36mm TIR. · AS Cadillac CTS-V 6.0L V8 Restricted Prep removes 295 tire size 50 lb penalty. · BMW 320i (14-15) classified in T3 with 1997cc displacement, 3050 lbs minimum weight, 18×10 wheels, 255/275 tyres. · T3 2022 BRZ and GR86 gain permitted sway bars to 25mm front, 22mm rear, OEM trunk spoiler, and other suspension options. · FA Ligier JS F3 must comply with FR Americas rules; competitors need current FR Americas Championship Sporting Regulations, Onroak manual, and HPD engine specs. · FA sealed engines now require full inspection by stewards; competitor pays all reassembly and resealing costs. · FA Formula Lites FL15 and FR Americas Ligier JS F3 engine sealing requirements clarified with regulatory references. · T3 Honda Civic Si 2017- notes clarify allowed parts and remove 50 lb penalty for wheels up to 10 inch wide. · T3 Porsche Boxster Base 2005-2008 added to spec: 2687cc, 3000 lbs minimum, 18×8 wheels, 245 tyres, alternate exhaust manifolds permitted. · T2-T4 Touring cars with alternative springs now permitted to use performance top hats with spherical bearings on shocks and struts. · T3 Subaru BRZ and Toyota 86 (2022-) add cold air intake, strut tower brace, SPC rear arms, 750 F/R springs, and optional OEM brakes with 100 lb penalty. · FA: transverse gearbox shafts prohibited except final drive and motorcycle gearbox in Formula 1000. · FA Swift 016 2.5 liter aero spec now references 2.3 liter notes instead of N notes. · SM Majors must run authorized Penske shock and mount; Regional competitors not required until further evaluation. · T2-T4 touring cars model year 2018+ may use aftermarket ECU with 75 lb weight penalty via spec line adjustment. · T3 Ford Mustang V6 (11-14) minimum weight drops 50 lbs to 3350. · T3 Subaru STI 15–20 now allows SPC lower control arm 67660. · FA Pro Formula Mazda now allows street port or bridge port; porting was previously not permitted. · T3 BMW 330i minimum weight drops to 3125 lbs; tyres narrow to 245. · T3 Nissan 370Z 09-16 and 370Z NISMO 09-13 minimum weight increases to 3375 lbs. · T3 FWD models: most turbo inlet restrictors increased 35mm to 36mm; Focus ST final drive changed to 4.06 (1-4) 2.95 (5-6), brakes to 320F/271R; GTI 14.5-17 gear ratios changed DSG and STD. · T2-T4 grill opening removal for cooling permitted without 16 square inch limit; mesh shape must match factory. · T3 Spec Lines: Subaru BRZ TS (13-21) now listed as 'Subaru BRZ, BRZ TS (13-21)'. · T3 VW GTI allows any 4-piston brake kit from Stoptech, Alcon or Brembo, not just Stoptech. · FA adds Honda K20Z3 2.0L at 1350 lbs and Mazda MZR 2.0L at 1300 lbs; removes 4A-GE 1.8L and MZR 2.0L from Table 2; raises 1615cc baseline to 1250 lbs. · SMG Long Tube Headers: Borla PN 17237 discontinued, approved alternatives American Racing MT3-05134300LSNC or Kooks PN 11312000. · AS Mercury Capri 79-86 removed as separate spec line, merged into Ford Mustang 79-93 spec line. · AS Spec Mustang SMG Restricted Prep removes 3.73 gear ratio and 355/300 brake disc sizes. · AS Camaro, Firebird, Mustang full prep engines: alternate GM and Ford Performance cylinder heads permitted regionally with Allstar restrictor ALL26180. · T3 Scion FR-S/Toyota 86 GT and Subaru BRZ minimum weight reduced 75 lbs to 2675; aero rules simplified. · T3 adds 2022+ Subaru BRZ and Toyota 86, both 2400cc, 2575mm wheelbase, 18x9 wheels, 245 tyres, 2750 lbs. · T2, T3, T4 clarify grill opening removal limited to 16 square inches for radiator cooling; mesh shape must be retained. · T3 BMW 335i model years adjusted from 08-13 to 07-10. · T3 BMW 135i model years restricted to 08-10, no longer 08-13. · T2, T3, T4 radiator and coolant hoses may be replaced with aftermarket options; coolant temp sensor modification permitted. · T3 Nissan 350Z and 370Z suspension: SPC Control Arms 72130, 72125 now allow 72123 alternative. · T2, T3, T4: clarified that 'permitted' or 'allowed' parts in spec lines are alternatives to category rule allowances, not replacements. · T3 BMW Z4 M Coupe model years expand from 2007 only to 2006–2008. · T3 Subaru STI (15–20) minimum weight rises to 3350 lbs. · T4 adds 2014 VW Jetta 1.8T TSI to Spec Lines. · T3 BMW 323Ci/Is 98-00 minimum weight reduced to 3000 lbs. · Subaru STI (15-20) added to T3 with 2457cc engine, 3200 lbs minimum weight, 18×9 wheels, 245 tyres. · AS Chevrolet/Pontiac Camaro & Firebird 93-02 gains BMR AA004 or UMI 2310 adjustable front upper control arms. · AS Pontiac GTO 04-06 Restricted Prep minimum weight rises: LS1 to 3300 lbs, LS2 to 3350 lbs on 295 tires.showhide
AS Request to add Hoosier W2 #33031tyres & wheelsaddedtyres & wheelsAS adds Hoosier W2 wet tyre option alongside R7, R6, WET/H20.
AS correction of Dodge Challenger specification line #33151cars addedaddedAS Dodge Challenger 08-20 gains two transmission ratio options: 2.97–0.50 or 2.26–0.63.
T3 S2000 Hard Top Clarification #32779cars addedaddedT3 Honda S2000 00-09 now permits OEM, Mugen P/N 0000-04-2312, or aftermarket hardtop retaining OEM roof silhouette with positive fasteners.
T3 T3 Pontiac Solstice- #33081tyres & wheelstyres & wheelsT3 Pontiac Solstice GXP Coupe/Convertible 07-09 tire runout increases from 35mm to 36mm TIR.
T3 Classify Car #32691cars addedaddedBMW 320i (14-15) classified in T3 with 1997cc displacement, 3050 lbs minimum weight, 18×10 wheels, 255/275 tyres.
T3 2022 BRZ Sway bar and lip spoiler. #32703suspension & brakesaddedsuspension & brakesT3 2022 BRZ and GR86 gain permitted sway bars to 25mm front, 22mm rear, OEM trunk spoiler, and other suspension options.
FA Update FR Americas rulebook requirement #32491wordingwordingFA Ligier JS F3 must comply with FR Americas rules; competitors need current FR Americas Championship Sporting Regulations, Onroak manual, and HPD engine specs.
FA Clarify verification of sealed engine compliance #32522wordingwordingFA sealed engines now require full inspection by stewards; competitor pays all reassembly and resealing costs.
FA Clarify Formula Lites and FR Americas sealed engine requirement #32523wordingwordingFA Formula Lites FL15 and FR Americas Ligier JS F3 engine sealing requirements clarified with regulatory references.
T3 correct wording #31750wordingfasterT3 Honda Civic Si 2017- notes clarify allowed parts and remove 50 lb penalty for wheels up to 10 inch wide.
T3 2005-2008 Porsche Boxster 2.7 #31999cars addedaddedT3 Porsche Boxster Base 2005-2008 added to spec: 2687cc, 3000 lbs minimum, 18×8 wheels, 245 tyres, alternate exhaust manifolds permitted.
T3 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakesaddedsuspension & brakesT2-T4 Touring cars with alternative springs now permitted to use performance top hats with spherical bearings on shocks and struts.
T3 2022 Subaru BRZ and Toyota 86 twins #32483cars addedaddedT3 Subaru BRZ and Toyota 86 (2022-) add cold air intake, strut tower brace, SPC rear arms, 750 F/R springs, and optional OEM brakes with 100 lb penalty.
FA E&O FA Transmission section #32251wordingwordingFA: transverse gearbox shafts prohibited except final drive and motorcycle gearbox in Formula 1000.
FA E&O Swift 016 2.5 liter Aero column #32363wordingwordingFA Swift 016 2.5 liter aero spec now references 2.3 liter notes instead of N notes.
SM Update GCR Section 9.1.7.3.A.1. #32217wordingwordingSM Majors must run authorized Penske shock and mount; Regional competitors not required until further evaluation.
T3 Request to Allow the Use of Aftermarket ECU's in Touring #31067engineaddedengineT2-T4 touring cars model year 2018+ may use aftermarket ECU with 75 lb weight penalty via spec line adjustment.
T3 T3 Mustang V8/V6 #31959weight -50 lbsfasterweightT3 Ford Mustang V6 (11-14) minimum weight drops 50 lbs to 3350.
T3 Subaru STI (15-20) Missing part #32294suspension & brakesaddedsuspension & brakesT3 Subaru STI 15–20 now allows SPC lower control arm 67660.
FA Closing the Gap #31934enginefasterengineFA Pro Formula Mazda now allows street port or bridge port; porting was previously not permitted.
T3 Touring 3 BOP adjustments for 2022 #31481weight +75 lbs
T3 BMW 330i Minimum Comp Weight #31606weight -60 lbsfasterweightT3 BMW 330i minimum weight drops to 3125 lbs; tyres narrow to 245.
T3 Adjust T3 370Z #31748weight +50 lbsslowerweightT3 Nissan 370Z 09-16 and 370Z NISMO 09-13 minimum weight increases to 3375 lbs.
T3 TIR changes for FWD T3 models #31825otherunclearT3 FWD models: most turbo inlet restrictors increased 35mm to 36mm; Focus ST final drive changed to 4.06 (1-4) 2.95 (5-6), brakes to 320F/271R; GTI 14.5-17 gear ratios changed DSG and STD.
T3 Reply to letter #31486/29879 T2-T4 Grill openings #31935aerofasteraeroT2-T4 grill opening removal for cooling permitted without 16 square inch limit; mesh shape must match factory.
T3 BRZ vs BRZ TS #32022wordingwordingT3 Spec Lines: Subaru BRZ TS (13-21) now listed as 'Subaru BRZ, BRZ TS (13-21)'.
T3 Remove StopTech 4 piston BBK, allow any 4 Piston Kit - VW GTI #33082aeroaeroT3 VW GTI allows any 4-piston brake kit from Stoptech, Alcon or Brembo, not just Stoptech.
FA Reorganize Tables 1 and 2 #31985cars addedaddedFA adds Honda K20Z3 2.0L at 1350 lbs and Mazda MZR 2.0L at 1300 lbs; removes 4A-GE 1.8L and MZR 2.0L from Table 2; raises 1615cc baseline to 1250 lbs.
AS Proposed Revisions to SCCA GCR 2021 Appendix M, Part 3 #30295wordingwordingSMG Long Tube Headers: Borla PN 17237 discontinued, approved alternatives American Racing MT3-05134300LSNC or Kooks PN 11312000.
AS specification line consolidation and correction #31846cars addedremovedcars addedAS Mercury Capri 79-86 removed as separate spec line, merged into Ford Mustang 79-93 spec line.
AS correction of SMG specification line #31847wordingremovedAS Spec Mustang SMG Restricted Prep removes 3.73 gear ratio and 355/300 brake disc sizes.
AS Alternate cylinder heads for full prep engine builds - Evaluation #31851engineaddedengineAS Camaro, Firebird, Mustang full prep engines: alternate GM and Ford Performance cylinder heads permitted regionally with Allstar restrictor ALL26180.
T3 Request FRS/BRZ/86 T3 Weight Reduction #30818weight -75 lbsfasterweightT3 Scion FR-S/Toyota 86 GT and Subaru BRZ minimum weight reduced 75 lbs to 2675; aero rules simplified.
T3 Request to Classify 2022 Toyota 86 / Subaru in T3 & T4 #30931cars addedaddedT3 adds 2022+ Subaru BRZ and Toyota 86, both 2400cc, 2575mm wheelbase, 18x9 wheels, 245 tyres, 2750 lbs.
T3 Reply to letter 29879 T2-T4 Grill Openings #31486wordingwordingT2, T3, T4 clarify grill opening removal limited to 16 square inches for radiator cooling; mesh shape must be retained.
T3 Please Adjust Years Allowed for BMW 335i to 07-10, not 08-13 #31530wordingwordingT3 BMW 335i model years adjusted from 08-13 to 07-10.
T3 Please Adjust Years Allowed for BMW 135i to 08-10, not 08-13 #31531wordingwordingT3 BMW 135i model years restricted to 08-10, no longer 08-13.
T3 Request to clarify radiator hoses #31682otheraddedT2, T3, T4 radiator and coolant hoses may be replaced with aftermarket options; coolant temp sensor modification permitted.
T3 T3 Nissan Z Suspension Update #31728suspension & brakessuspension & brakesT3 Nissan 350Z and 370Z suspension: SPC Control Arms 72130, 72125 now allow 72123 alternative.
T3 Clarify Permitted/Allowed #31743wordingwordingT2, T3, T4: clarified that 'permitted' or 'allowed' parts in spec lines are alternatives to category rule allowances, not replacements.
T3 Request to correct model years BMW Z4 M Coupe #31371cars addedaddedT3 BMW Z4 M Coupe model years expand from 2007 only to 2006–2008.
T3 Correct letter the 31327 #31563weight +150 lbsslowerweightT3 Subaru STI (15–20) minimum weight rises to 3350 lbs.
T3 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars addedaddedT4 adds 2014 VW Jetta 1.8T TSI to Spec Lines.
T3 Request Weight Reduction 323is #30765weight -100 lbsfasterweightT3 BMW 323Ci/Is 98-00 minimum weight reduced to 3000 lbs.
T3 Class Newer STI in T3 #31327cars addedaddedSubaru STI (15-20) added to T3 with 2457cc engine, 3200 lbs minimum weight, 18×9 wheels, 245 tyres.
AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457otheraddedAS Chevrolet/Pontiac Camaro & Firebird 93-02 gains BMR AA004 or UMI 2310 adjustable front upper control arms.
AS Request Pontiac GTO tire size change #30881weightslowerweightAS Pontiac GTO 04-06 Restricted Prep minimum weight rises: LS1 to 3300 lbs, LS2 to 3350 lbs on 295 tires.
1:29.701James French · fastest of 18 · top 5 within 2.7s-0.256s (-0.28%)
1:30.650James French · fastest of 17 · top 5 within 6.1s-0.715s (-0.78%)
155.5James French
1:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)
1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)
119.8Kyle Greenhill
+28.187squal +27.994s
131.1%qual 131.2%
1:51.591Marshall Mast · fastest of 23 · top 5 within 0.9s-0.623s (-0.56%)
1:52.701Breton Williams · fastest of 22 · top 5 within 0.7s-0.585s (-0.52%)
136.4Jason Ott
+22.051squal +21.890s
124.3%qual 124.4%
1:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%)
1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%)
153.8James Jost
+19.956squal +20.726s
122.0%qual 123.1%
56 rule changes (FA: 22, SM: 1, T3: 19, AS: 14)16 cars added · 8 weight · 5 engine · 3 tyres & wheels · 1 aero · 1 induction · 17 wording · 5 other · FA Mazda MZR 2.0 engine name shortened to Mazda MZR; Honda Civic K20Z3 name clarified. · Toyota 1800 moves from FA Table 1 to FA Table 2 Spec Line Cars. · FA Swift 016 Mazda MZR/Ford Duratec wheel width spec clarified: front 10, rear 14 min & 15 max inches. · FA rule text reorganized: purpose-built and ex-pro cars moved to Table 1, spec line cars to Table 2, with clarified engine note applicability. · FA Mazda MZR/Ford Duratec 2296cc and 2500cc moved from Table 1 to Table 2. · FA Mazda MZR 2.0L and Honda Civic K20Z3 change from 5-speed sequential to 5-speed. · T3 Porsche Spec Boxster minimum weight reduced to 2550 lbs. · T3 Porsche Cayman 06-08 wheel width increases from 8 to 9 inches. · T3 Mazda MX-5 Global Cup Miata ND2 with sequential gearbox allowed +100 lbs weight adder. · AS Cadillac CTS-V 6.0L LS6 removes 295-tire 50 lb penalty. · AS consolidates seven SN95 Mustang '94-'04 spec lines into three unified lines by model year and engine. · AS Camaro/Firebird LT1 and LS1 transmission changed to TUET1 6362; Mustang GT 4.6L/5spd to TUKT16901, loses 300 lbs. · AS Camaro & Firebird and Mustang GT gear ratio specifications restored with alternate sets permitted. · AS Camaro, Firebird, Mustang, and Capri all gain 50 lbs minimum weight across seven model year variants. · FA Mazda MZR 2.0 limited to Ralt RT40, RT41, Swift 008, 014 chassis; Honda Civic K20Z3 removes Swift 016 chassis. · T3 Honda Civic Type-R 2020+ allowed brake rotor #45251-TGH-A01 with 25 lb penalty. · FA Swift 016 2.3 liter engine name corrected to Mazda MZR/Ford Duratec. · FA Swift 016 2.5 liter engine name corrected to Mazda MZR/Ford Duratec. · FA removes four spec lines (E–H); spec line D changes from Ford Duratec/Mazda MZR 2500 to Honda B16 1615, loses 29mm restrictor, weight 1400 to 1175 lbs. · T3 Porsche Boxster/Boxster S 00-04 now allows any OEM or aftermarket hardtop retaining OEM roof silhouette. · T3 Mazdaspeed3 07-09 and 10-13 allow CorkSport Gen-6-999-10 or Autotech 10-127-100K fuel pump. · FA Spec Lines C, I, K weights adjusted: C to 1175 lbs, I to 1175 lbs, K to 1175 lbs. · FA purpose-built and ex-Pro Atlantic cars remove sequential trans. 25 lb penalty redundant reference. · FA Ligier car name corrected to FR Americas Ligier JS F3. · FA Ford Duratec/Mazda MZR Spec Line D clarifies valve specification to 4 per cylinder, no performance change. · FA Honda Civic K20Z3 intake manifold and throttle body now may use AT Power Direct-To-Head 45mm individual throttle bodies PN 102-104-00020 as alternative. · SM adds procedure for CRB-approved obsolete parts and BOP testing in sanctioned events with point forfeiture. · T2-T4 clutch discs and pressure plates must be at least 95% of factory OEM weight, bolted to unmodified stock flywheel. · Porsche Cayman 06-08 added to T3 with 2687cc engine, 3050 lbs minimum weight, 18-inch wheels, 245 tires. · AS Mustang 4.6L 5spd gains cold air intake freedom; 5.0L 6spd now requires 56mm flat plate restrictor. · AS CTS-V 5.7L LS6 and 6.0L LS2 may use Driveshaft Shop P/N GMCTSV2-C carbon fiber driveshaft. · AS Chevrolet Camaro SS V8 6.2L Restricted Prep model years extended from 10–13 to 10–15. · FA Ford Duratec/Mazda MZR intake restrictor reduced from 32mm to 30mm SIR; Swift 016 2.5 Mazda restrictor reduced from 35mm to 33mm SIR. · FA Toyota 4A-GE Spec Lines A and B: engine designation and valve configuration clarified, weights and displacement unchanged. · FA Ford BD Series engine displacement increases from 1600 cc to 1615 cc; minimum weight stays 1200 lbs. · FA Ford Duratec/Mazda MZR and Honda B16 engines both now limited to 1615cc displacement; both lose NA restrictor requirement. · Pro Formula Mazda engine specifications moved from Table 1 to Table 2 spec line notes; no performance changes. · Toyota Supra 2020- added to T2 with 2998 cc engine, 3450 lbs minimum weight, 19×10 wheels, 295 tyres. · T3 Chevrolet Camaro LT-I4 Turbo 1LE model year changed to 2016-, max tyre size 275, TIR 35mm. · T2 Ford Mustang GT 5.0L 15-17 gear ratios changed to 3.66, 2.43, 1.69, 1.32, 1.00, 0.65 or 4.17, 2.34, 1.52, 1.14, 0.87, 0.69. · T3 Spec Boxster tires must be 245 DOT, up from 225. · AS Ford Mustang GT 5.0L 15-17 Restricted added to Spec Line with 3600 lbs minimum weight, 55mm restrictor, 18×10 wheels, 295 tires. · AS underhood bracing on stock hoods, trunks, and rear decks may be modified or removed. · AS Cadillac CTS-V 04-07 with 295 tire drops to 3450 lbs; Camaro SS V8 10-13 and Challenger 08-20 specs removed. · AS Camaro & Firebird (93-02) and Mustang GT (05-14) specifications restored with weight minimums 3250–3500 and 3350–3600 lbs respectively. · Formula Lites Crawford FL15 added to FA classification effective 2021-01-01. · T2 BMW M2 CS Cup 2020+ classified at 2979 cc, 3625 lbs, 295 tires, 10.5×18 wheels, 380/390 mm brakes. · T3 and T4 Mazda MX-5 06-15 now allow Mazda Transmission kit part # 0000-02-5700. · T2 and T3 Nissan 350Z and 370Z permit 44011-RC350 rear caliper kit and SZ350 rotors; T2 350Z also permits Stillen 400338. · T4 Ford Mustang V6 05-10 allows GT 8.8 rear axle with 3.55 final drive, plus 25 lb penalty. · T3 Scion FR-S/Toyota 86 and Subaru BRZ capped to 2021 model year; T4 models capped to 2021. · AS Dodge Challenger gains 6.1L and 6.4L V8 options; 5.7L weight rises to 3500 lbs on 295 tyres, 3600 on 315 tyres; compression to 10.9:1 max. · AS Camaro & Firebird (93-02) and Ford Mustang Coupe GT (05-14) spec lines consolidated; Camaro/Firebird now allows both LT1 and LS1 engines; Mustang now allows both 4.6L 3-valve and 5.0L 4-valve engines with restrictor. · T3 Alfa Romeo 4C Launch Edition variant now allowed.showhide
FA E&O Table 2 engine names #31085wordingwordingFA Mazda MZR 2.0 engine name shortened to Mazda MZR; Honda Civic K20Z3 name clarified.
FA Move Toyota 1800 to Table 2 #30822cars addedcars addedToyota 1800 moves from FA Table 1 to FA Table 2 Spec Line Cars.
FA E&O Swift 016 wheel width reference #30939wordingwordingFA Swift 016 Mazda MZR/Ford Duratec wheel width spec clarified: front 10, rear 14 min & 15 max inches.
FA Update FA rules package #30717wordingwordingFA rule text reorganized: purpose-built and ex-pro cars moved to Table 1, spec line cars to Table 2, with clarified engine note applicability.
FA Move Mazda MZR/Ford Duratec 2296cc and 2500cc to Table 2 #30718cars addedaddedFA Mazda MZR/Ford Duratec 2296cc and 2500cc moved from Table 1 to Table 2.
FA Clean up Table 2 Mazda MZR 2.0L and Honda Civic K20Z3 spec lines #30719wordingwordingFA Mazda MZR 2.0L and Honda Civic K20Z3 change from 5-speed sequential to 5-speed.
T3 Follow-up to letter 29797-Porsche Spec Boxster in T3 Adjustment #30144weight -50 lbsfasterweightT3 Porsche Spec Boxster minimum weight reduced to 2550 lbs.
T3 Wheel Size #30677tyres & wheelsfastertyres & wheelsT3 Porsche Cayman 06-08 wheel width increases from 8 to 9 inches.
T3 Request weight adder to be applied to the Global Cup Miata ND2 #30730weightslowerweightT3 Mazda MX-5 Global Cup Miata ND2 with sequential gearbox allowed +100 lbs weight adder.
AS Request CTS-V Spec Line Error Correction #30242weightfasterweightAS Cadillac CTS-V 6.0L LS6 removes 295-tire 50 lb penalty.
AS Request to consolidate SN95 Mustang '94-'04 Mustang spec lines #30428wordingwordingAS consolidates seven SN95 Mustang '94-'04 spec lines into three unified lines by model year and engine.
AS American Sedan Transmission Rule Change Request #30595enginefasterengineAS Camaro/Firebird LT1 and LS1 transmission changed to TUET1 6362; Mustang GT 4.6L/5spd to TUKT16901, loses 300 lbs.
AS Correction to specifications inadvertently deleted #30691wordingwordingAS Camaro & Firebird and Mustang GT gear ratio specifications restored with alternate sets permitted.
AS weight adjustments #30700weight +50 lbsslowerweightAS Camaro, Firebird, Mustang, and Capri all gain 50 lbs minimum weight across seven model year variants.
FA E&O Mazda MZR 2.0 and Honda Civic K20Z3 chassis eligibility #30632cars addedremovedcars addedFA Mazda MZR 2.0 limited to Ralt RT40, RT41, Swift 008, 014 chassis; Honda Civic K20Z3 removes Swift 016 chassis.
T3 Civic Type R Brake Rotors #29817weightslowerweightT3 Honda Civic Type-R 2020+ allowed brake rotor #45251-TGH-A01 with 25 lb penalty.
FA Correct engine name in Swift 016 2.3 liter spec line #30447wordingwordingFA Swift 016 2.3 liter engine name corrected to Mazda MZR/Ford Duratec.
FA Correct engine name in Swift 016 2.5 liter spec line #30448wordingwordingFA Swift 016 2.5 liter engine name corrected to Mazda MZR/Ford Duratec.
FA Revise Table 1 Spec Lines and clarify application of Engine Notes #30456cars addedfastercars addedFA removes four spec lines (E–H); spec line D changes from Ford Duratec/Mazda MZR 2500 to Honda B16 1615, loses 29mm restrictor, weight 1400 to 1175 lbs.
T3 Requesting Variance on Hardtop #30093aeroaddedaeroT3 Porsche Boxster/Boxster S 00-04 now allows any OEM or aftermarket hardtop retaining OEM roof silhouette.
T3 07-09 and 10-13 Mazdaspeed 3 Fuel Pump #30154otheraddedT3 Mazdaspeed3 07-09 and 10-13 allow CorkSport Gen-6-999-10 or Autotech 10-127-100K fuel pump.
FA Update Table 1 Weights for Spec Lines C, I, and K #30355weight -25 lbsfasterweightFA Spec Lines C, I, K weights adjusted: C to 1175 lbs, I to 1175 lbs, K to 1175 lbs.
FA Remove redundant reference in Table 2 spec line #30366wordingwordingFA purpose-built and ex-Pro Atlantic cars remove sequential trans. 25 lb penalty redundant reference.
FA Correct the name of the FR Americas car #30369wordingwordingFA Ligier car name corrected to FR Americas Ligier JS F3.
FA Clean up Spec Line D in Table 1 #30372wordingwordingFA Ford Duratec/Mazda MZR Spec Line D clarifies valve specification to 4 per cylinder, no performance change.
FA Table 2 Honda K20Z3 request #30386engineaddedengineFA Honda Civic K20Z3 intake manifold and throttle body now may use AT Power Direct-To-Head 45mm individual throttle bodies PN 102-104-00020 as alternative.
SM Updates - Obsolete Parts & BOP Parts #30438wordingaddedSM adds procedure for CRB-approved obsolete parts and BOP testing in sanctioned events with point forfeiture.
T3 Request consistency review in GCR #30263wordingwordingT2-T4 clutch discs and pressure plates must be at least 95% of factory OEM weight, bolted to unmodified stock flywheel.
T3 Request to classify 2006-2008 Cayman #30315cars addedaddedPorsche Cayman 06-08 added to T3 with 2687cc engine, 3050 lbs minimum weight, 18-inch wheels, 245 tires.
AS AS Mustang LP 4.6 3V Classification Transmission Request #29886enginefasterengineAS Mustang 4.6L 5spd gains cold air intake freedom; 5.0L 6spd now requires 56mm flat plate restrictor.
AS Request CF driveshaft on CTS-V for durability improvement #30117otheraddedAS CTS-V 5.7L LS6 and 6.0L LS2 may use Driveshaft Shop P/N GMCTSV2-C carbon fiber driveshaft.
AS Adjustment to model years of 5th generation RP Camaro #30348cars addedaddedAS Chevrolet Camaro SS V8 6.2L Restricted Prep model years extended from 10–13 to 10–15.
FA E&O FA Intake Restrictors #30273inductionslowerinductionFA Ford Duratec/Mazda MZR intake restrictor reduced from 32mm to 30mm SIR; Swift 016 2.5 Mazda restrictor reduced from 35mm to 33mm SIR.
FA Clean up Spec Lines A and B in Table 1 #30274wordingwordingFA Toyota 4A-GE Spec Lines A and B: engine designation and valve configuration clarified, weights and displacement unchanged.
FA Clean up Spec Line C in Table 1 #30275enginefasterengineFA Ford BD Series engine displacement increases from 1600 cc to 1615 cc; minimum weight stays 1200 lbs.
FA Clean up Spec Lines J and L in Table 1 #30276engineengineFA Ford Duratec/Mazda MZR and Honda B16 engines both now limited to 1615cc displacement; both lose NA restrictor requirement.
FA Move engine specifications to Pro Formula Mazda spec line notes #30278wordingwordingPro Formula Mazda engine specifications moved from Table 1 to Table 2 spec line notes; no performance changes.
T3 2021 Toyota Supra #29567cars addedaddedToyota Supra 2020- added to T2 with 2998 cc engine, 3450 lbs minimum weight, 19×10 wheels, 295 tyres.
T3 Chevrolet Camaro LT-I4 Turbo 1LE (2019-) Model Year to 2016- #30090tyres & wheelsfastertyres & wheelsT3 Chevrolet Camaro LT-I4 Turbo 1LE model year changed to 2016-, max tyre size 275, TIR 35mm.
T3 Fix T2 Mustang spec line #30106otherunclearT2 Ford Mustang GT 5.0L 15-17 gear ratios changed to 3.66, 2.43, 1.69, 1.32, 1.00, 0.65 or 4.17, 2.34, 1.52, 1.14, 0.87, 0.69.
T3 Spec Boxster Tire Size #30159tyres & wheelstyres & wheelsT3 Spec Boxster tires must be 245 DOT, up from 225.
AS Request for 2015 -2017 Ford Mustang Spec Line #29514cars addedaddedAS Ford Mustang GT 5.0L 15-17 Restricted added to Spec Line with 3600 lbs minimum weight, 55mm restrictor, 18×10 wheels, 295 tires.
AS Request Trunk lid / Rear Hatch clarification #29591wordingwordingAS underhood bracing on stock hoods, trunks, and rear decks may be modified or removed.
AS Common Weight for CTS-V Tire #29759weightfasterweightAS Cadillac CTS-V 04-07 with 295 tire drops to 3450 lbs; Camaro SS V8 10-13 and Challenger 08-20 specs removed.
AS Correction to specifications inadvertently deleted #30041cars addedaddedAS Camaro & Firebird (93-02) and Mustang GT (05-14) specifications restored with weight minimums 3250–3500 and 3350–3600 lbs respectively.
FA Request to classify Formula Lites Crawford FL15 #29702cars addedaddedFormula Lites Crawford FL15 added to FA classification effective 2021-01-01.
T3 Request to Classify BMW M2 CS #29523cars addedaddedT2 BMW M2 CS Cup 2020+ classified at 2979 cc, 3625 lbs, 295 tires, 10.5×18 wheels, 380/390 mm brakes.
T3 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5 #29681otheraddedT3 and T4 Mazda MX-5 06-15 now allow Mazda Transmission kit part # 0000-02-5700.
T3 350Z Rear Caliper Replacement #29710cars addedaddedT2 and T3 Nissan 350Z and 370Z permit 44011-RC350 rear caliper kit and SZ350 rotors; T2 350Z also permits Stillen 400338.
T3 Request Mustang 8.8†rear axle replacement #29860cars addedaddedT4 Ford Mustang V6 05-10 allows GT 8.8 rear axle with 3.55 final drive, plus 25 lb penalty.
T3 Cap year range on all 86s #29908wordingwordingT3 Scion FR-S/Toyota 86 and Subaru BRZ capped to 2021 model year; T4 models capped to 2021.
AS Request Additional Engine Options for Dodge Challenger Spec Line #29543cars addedaddedAS Dodge Challenger gains 6.1L and 6.4L V8 options; 5.7L weight rises to 3500 lbs on 295 tyres, 3600 on 315 tyres; compression to 10.9:1 max.
AS Rule simplification spec line communization #29824cars addedcars addedAS Camaro & Firebird (93-02) and Ford Mustang Coupe GT (05-14) spec lines consolidated; Camaro/Firebird now allows both LT1 and LS1 engines; Mustang now allows both 4.6L 3-valve and 5.0L 4-valve engines with restrictor.
T3 Alfa Romeo 4C Launch Edition #29531cars addedaddedT3 Alfa Romeo 4C Launch Edition variant now allowed.
2:04.274Spencer Brockman · fastest of 11 · top 5 within 2.7s
2:04.746Spencer Brockman · fastest of 10 · top 5 within 2.4s
150.6Hans Peter
2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s
2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s
121.3Kyle Greenhill
+39.002squal +37.935s
131.3%qual 130.5%
2:29.757Marshall Mast · fastest of 29 · top 5 within 2.1s
2:31.688Marshall Mast · fastest of 20 · top 5 within 1.8s
138.1Jason Ott
+26.942squal +25.483s
121.6%qual 120.5%
2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s
2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s
149.2Gregory Eaton
+22.922squal +22.771s
118.4%qual 118.3%
59 rule changes (FA: 15, SM: 2, T3: 26, AS: 16)15 cars added · 7 engine · 6 suspension & brakes · 4 weight · 3 tyres & wheels · 1 aero · 1 induction · 20 wording · 2 other · SM allows aftermarket radiators in original location with stock OEM cooling fan, and permits 1990-1997 cars to install upper radiator seal NA75-50-OK7A. · T3 Honda Civic Type R (2017–) classified: 1996 cc, 3350 lbs, 245 tyres, 20-inch wheels, with HPD parts allowed. · AS Dodge Challenger 5.7L V8 now requires iron block instead of aluminum, compression to 10.5:1 max, intake valve 12.7 mm, exhaust 12.3 mm, intake timing 188 degrees, exhaust timing 205 degrees. · AS Dodge Challenger 08-14 rear spoiler: 1GL20RXF replaced with 1GL20TZZAB; 82211606 still permitted. · SM rear brake caliper may use single bracket under upper retaining bolt head to prevent pin failure. · T3 Honda Accord 2009 V6 manual classified with 3471 cc displacement, 3450 lbs minimum weight, 245 tire, 19x9 wheels. · AS class pursuing specified list of eligible tires; list details unclear from text provided. · AS class tire eligibility list under development; no specifications changed yet. · AS Coyote Mustang restrictor plate under review for 2021; no change effective yet. · AS Restricted Prep 4.6 3V now permits conversion to 2 valve configuration. · AS Ford Mustang Coupe GT 4.6L 3V Restricted Prep now permits Ford Performance camshaft kit P/N M-6550-3V. · 2010-2014 Camaro remains classified in AS; no specification changes. · AS class cylinder head supplier discontinuation; replacement option pending for 2021 season. · AS Mustang, Capri, Camaro, and Firebird maximum brake rotor diameter increased from 12.2 to 13.1 inches. · unclear · FA stock engine weight adjustment request denied; modified engines now permitted in FA. · T3 Mazda MX-5 ND2 Global Cup Miata must meet all ND2 rules; Appendix reference removed. · T3 Volkswagen GTI, Jetta GLI 06-10 FSI: sway bars to 42mm, springs to 800 lb/in, turbo restrictor 35mm max, R32 brakes allowed, Stoptech 355mm allowed, Neuspeed intake allowed or OEM minus 25 lbs. · Request to add vehicle to T2, T3, T4 roster; refer to letter #27663 in June 2020 Fastrack for decision. · FA engine modifications clarified: bore/stroke/flywheel unrestricted within displacement limits, distributor/ignition installation restricted, compression ratio machining allowed, table references updated. · FA transmissions limited to five forward speeds and operational reverse unless Table 2 notes otherwise. · FA Swift 016 Mazda Duratec: clarify Gurney flap wording, dimensions and allowed locations unchanged. · 2004 Mercedes Benz CLK 320 Coupe classified in T4 at 3200 lbs with 3299cc engine, 17-inch wheels, 245 tyres, EIBACH PN# 2563.140 springs allowed. · T3 Nissan 350Z brake kit part numbers specified: NISMO calipers 41001-FR350, rotors 40206-SZ350 and 40207-SZ350. · FA removes Volkswagen 1835cc SOHC engine specification line from Table 1. · FA engine rules clarify that blocks and heads must be OEM unless the tables note otherwise; wording only. · T3 Ford Mustang EcoBoost and V6 sway bars allowed up to 35mm front, 25mm rear. · T3 BMW Z3 M & Coupe 98-99 minimum weight reduced to 3150 lbs. · FA Formula 1000 motorcycle-based engines gain maximum compression ratio of 14.5:1, up from 13.5:1. · FA removes Ex-FSV wheel width rules, all cars now front ten inches, rear fourteen to fifteen inches. · FA Formula 3 permitted engine years extended from 1997–2008 to 1997–2017. · FA Table 1 engine notes now apply only to Table 1, not Table E; FA Table 2 Pro Formula Mazda engine references Table 1 specs. · T3 05-10 V8 Mustang allowed parts clarified: strut tower brace, radiator, sway bars, damper kit, max spring rates 500 lbs/in front, 300 lbs/in rear. · T3 Ford Mustang Coupe GT & Shelby GT 4.6L 05-10 adds permitted final drive ratios: 3.31, 3.55 or 3.73. · AS rear trailing arms may be replaced with tubular arms maintaining stock length and axle location purpose only. · AS Ford and GM full prep cars get increased weight reduction from 150 to 200 lbs. · 05-10 Ford Mustang Coupe GT 4.6L OHC classified AS with 3200 lbs minimum weight, HR cam permitted. · 10-15 Camaro Full Prep classified AS with 3400 lbs base weight, 3700 lbs over 313 CID, specific head castings and Edelbrock heads permitted. · T3 adds BMW 330i 2006-2012, 2996 cc, 18×9 wheels, 245 tyres, 3200 lbs minimum. · Pontiac Solstice GXP and Saturn Sky move from T2 to T3; wheels widen to 18x9.5, Sky weight drops to 3200 lbs. · Mazda RX-8 Base/R3/Sport/GT (04-12) classified in T3 effective 2020-02-01. · T3 adds 2017 Ford Fiesta ST, 1596 cc, 2600 lbs minimum, 245 max tyre, 17×9 wheel, 280 F/254 R brakes. · Formula 1000 motorcycle-based engine up to 1000cc added to FA with unrestricted throttle bodies and ECUs. · unclear · FA Swift 016 2.3L Mazda Duratec restrictor reduced from 33mm to 31mm SIR. · T2 must have fire system installed; T3 and T4 may have one per GCR 9.3. · T3 Ford Mustang EcoBoost gains three transmission gear ratio options. · T3 Nissan 350Z and 370Z HR engines require 42mm restrictors instead of 37mm; minimum weights increase 50–100 lbs across variants. · T3 Mazda MX-5 Global Cup Miata tire spec clarified to 215/610 R17 BF Goodrich G-Force Slick or wet; touring tire rule removed. · T3 05-10 Mustang GT suspension upgrades allowed: strut tower brace, radiator, spring rate 500 lbs/in front 300 rear, sway bars, dampers, 40 mm restrictor, control arms, shock mounts, driveshaft options, bushings. · T3 BMW SpecE46 updates to SpecE46 rules version 2.6 to 2.7; tyre size to 225 max. · T3 Subaru WRX 02-05 minimum weight drops 100 lbs to 3250. · T3 and T4 Mazda RX-8 Base/R3 (04-12) reclassified to include Sport and GT variants. · Toyota 86 GT variant (2017–) added to T3 and T4 spec lines. · FA wheel diameter and width specifications moved from Bodywork subsection to General section. · FA Mazda MZR 2.0 engine use restricted to Ralt RT40, Ralt RT41, and Swift 014 chassis only. · T3 Scion FR-S/Toyota 86 and Subaru BRZ year range extended from 13-17 to 13-20.showhide
SM Radiator E&O Clarifications #29294wordingwordingSM allows aftermarket radiators in original location with stock OEM cooling fan, and permits 1990-1997 cars to install upper radiator seal NA75-50-OK7A.
T3 Request to Classify Honda Civic Type R in T3 #27840cars addedaddedT3 Honda Civic Type R (2017–) classified: 1996 cc, 3350 lbs, 245 tyres, 20-inch wheels, with HPD parts allowed.
AS Dodge Challenger AS Spec Line Clarification #28698engineslowerengineAS Dodge Challenger 5.7L V8 now requires iron block instead of aluminum, compression to 10.5:1 max, intake valve 12.7 mm, exhaust 12.3 mm, intake timing 188 degrees, exhaust timing 205 degrees.
AS Dodge Challenger AS Spec Line Clarification #2 #28699aeroaeroAS Dodge Challenger 08-14 rear spoiler: 1GL20RXF replaced with 1GL20TZZAB; 82211606 still permitted.
SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakessuspension & brakesSM rear brake caliper may use single bracket under upper retaining bolt head to prevent pin failure.
T3 Request to classify 2009 Honda Accord v6 manual #28913cars addedaddedT3 Honda Accord 2009 V6 manual classified with 3471 cc displacement, 3450 lbs minimum weight, 245 tire, 19x9 wheels.
AS Support for R-Type Specification Tires #27450wordingunclearAS class pursuing specified list of eligible tires; list details unclear from text provided.
AS Spec Tire Request #27519wordingunclearAS class tire eligibility list under development; no specifications changed yet.
AS Restrictor Plate Change for RP 2011+ Mustang with Coyote Engine #27675wordingunclearAS Coyote Mustang restrictor plate under review for 2021; no change effective yet.
AS 2005-2009 Restricted Prep 4.6 3V #27908engineaddedengineAS Restricted Prep 4.6 3V now permits conversion to 2 valve configuration.
AS Request for 2005-2009 Restricted Prep 4.6 3V Parts #27909engineaddedengineAS Ford Mustang Coupe GT 4.6L 3V Restricted Prep now permits Ford Performance camshaft kit P/N M-6550-3V.
AS Request for Full Preparation Classification for 2010-2014 Camaro #28030wordingunclear2010-2014 Camaro remains classified in AS; no specification changes.
AS Cylinder Heads #28696wordingunclearAS class cylinder head supplier discontinuation; replacement option pending for 2021 season.
AS Request for Max Rotor Diameter Change #28748otherfasterAS Mustang, Capri, Camaro, and Firebird maximum brake rotor diameter increased from 12.2 to 13.1 inches.
AS Request increase rotor diameter #28797wordingunclearunclear
FA Request to Adjust FB Weight for Stock Engines #29005wordingunclearFA stock engine weight adjustment request denied; modified engines now permitted in FA.
T3 SADEV Sequential Gearbox #28763wordingwordingT3 Mazda MX-5 ND2 Global Cup Miata must meet all ND2 rules; Appendix reference removed.
T3 Request for competition adjustment for the MK5 GTI FSI engine #28802suspension & brakesfastersuspension & brakesT3 Volkswagen GTI, Jetta GLI 06-10 FSI: sway bars to 42mm, springs to 800 lb/in, turbo restrictor 35mm max, R32 brakes allowed, Stoptech 355mm allowed, Neuspeed intake allowed or OEM minus 25 lbs.
T3 Request to Add a Vehicle to the Roster (contd.) #27698wordingunclearRequest to add vehicle to T2, T3, T4 roster; refer to letter #27663 in June 2020 Fastrack for decision.
FA E&O permitted engine modifications #28831wordingwordingFA engine modifications clarified: bore/stroke/flywheel unrestricted within displacement limits, distributor/ignition installation restricted, compression ratio machining allowed, table references updated.
FA E&O Transmissions #28832wordingwordingFA transmissions limited to five forward speeds and operational reverse unless Table 2 notes otherwise.
FA Swift 016 Gurney flap wicker clarification #28884wordingwordingFA Swift 016 Mazda Duratec: clarify Gurney flap wording, dimensions and allowed locations unchanged.
T3 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars addedadded2004 Mercedes Benz CLK 320 Coupe classified in T4 at 3200 lbs with 3299cc engine, 17-inch wheels, 245 tyres, EIBACH PN# 2563.140 springs allowed.
T3 Request Nissan 350Z Part Number change #28145wordingwordingT3 Nissan 350Z brake kit part numbers specified: NISMO calipers 41001-FR350, rotors 40206-SZ350 and 40207-SZ350.
AS weight adjustments for 2020 season #28785weight -50 lbs
FA Remove redundant spec line in Table 1 #28720engineremovedengineFA removes Volkswagen 1835cc SOHC engine specification line from Table 1.
FA E&O general engine rules #28772wordingwordingFA engine rules clarify that blocks and heads must be OEM unless the tables note otherwise; wording only.
T3 2015 + Ford EcoBoost Mustang Sway Bars #28398suspension & brakesaddedsuspension & brakesT3 Ford Mustang EcoBoost and V6 sway bars allowed up to 35mm front, 25mm rear.
T3 Z3M Roadster Weight #28437weightfasterweightT3 BMW Z3 M & Coupe 98-99 minimum weight reduced to 3150 lbs.
FA Request higher compression ratio and prior weights for F1000 cars #28162enginefasterengineFA Formula 1000 motorcycle-based engines gain maximum compression ratio of 14.5:1, up from 13.5:1.
FA Remove redundant wheel dimension provisions #28554tyres & wheelstyres & wheelsFA removes Ex-FSV wheel width rules, all cars now front ten inches, rear fourteen to fifteen inches.
FA E&O Formula 3 spec line #28596engineaddedengineFA Formula 3 permitted engine years extended from 1997–2008 to 1997–2017.
FA FA weight correction/clarification #28430wordingwordingFA Table 1 engine notes now apply only to Table 1, not Table E; FA Table 2 Pro Formula Mazda engine references Table 1 specs.
T3 Clarify 05-10 V8 Mustang Spring Rates Wording/Adjust Restrictor #28238suspension & brakessuspension & brakesT3 05-10 V8 Mustang allowed parts clarified: strut tower brace, radiator, sway bars, damper kit, max spring rates 500 lbs/in front, 300 lbs/in rear.
T3 Correct Touring 3 05-10 Mustang final drive #28288cars addedaddedT3 Ford Mustang Coupe GT & Shelby GT 4.6L 05-10 adds permitted final drive ratios: 3.31, 3.55 or 3.73.
AS Rear Trailing Arms #28007suspension & brakesaddedsuspension & brakesAS rear trailing arms may be replaced with tubular arms maintaining stock length and axle location purpose only.
AS Weight reduction for cars running iron heads #28010weightfasterweightAS Ford and GM full prep cars get increased weight reduction from 150 to 200 lbs.
AS 05-10 Mustang with HR cam classification #28226cars addedadded05-10 Ford Mustang Coupe GT 4.6L OHC classified AS with 3200 lbs minimum weight, HR cam permitted.
AS 10-15 Camaro Full Prep classification #28227cars addedadded10-15 Camaro Full Prep classified AS with 3400 lbs base weight, 3700 lbs over 313 CID, specific head castings and Edelbrock heads permitted.
T3 2006 BMW E90 330i Sedan Classification #26663cars addedaddedT3 adds BMW 330i 2006-2012, 2996 cc, 18×9 wheels, 245 tyres, 3200 lbs minimum.
T3 Please Switch the Solstice GXP as Specified in T2, to T3 #27413cars added -50 lbsfastercars addedPontiac Solstice GXP and Saturn Sky move from T2 to T3; wheels widen to 18x9.5, Sky weight drops to 3200 lbs.
T3 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars addedaddedMazda RX-8 Base/R3/Sport/GT (04-12) classified in T3 effective 2020-02-01.
T3 Request for 2005 Subaru STI Changes #27658tyres & wheels +50 lbs
T3 Request to Classify 2017 Ford Fiesta ST #27700cars addedaddedT3 adds 2017 Ford Fiesta ST, 1596 cc, 2600 lbs minimum, 245 max tyre, 17×9 wheel, 280 F/254 R brakes.
FA Request to merge FB into FA #25611cars addedaddedFormula 1000 motorcycle-based engine up to 1000cc added to FA with unrestricted throttle bodies and ECUs.
FA Suggestions for FB/F1000 into FA #27319otherunclearunclear
FA Change Swift 016 - 2.3 liter Mazda Duratec restrictor size #27880inductionslowerinductionFA Swift 016 2.3L Mazda Duratec restrictor reduced from 33mm to 31mm SIR.
T3 Clarification of On-Board Fire System for T2 #27183wordingwordingT2 must have fire system installed; T3 and T4 may have one per GCR 9.3.
T3 Mustang Ecoboost and GT Transmission #27439cars addedaddedT3 Ford Mustang EcoBoost gains three transmission gear ratio options.
T3 Nissan 350Z HR Engine Restrictor Plate/Minimum Weight #27442engine +50 lbsslowerengineT3 Nissan 350Z and 370Z HR engines require 42mm restrictors instead of 37mm; minimum weights increase 50–100 lbs across variants.
T3 Request help for the GMX5 #27572tyres & wheelstyres & wheelsT3 Mazda MX-5 Global Cup Miata tire spec clarified to 215/610 R17 BF Goodrich G-Force Slick or wet; touring tire rule removed.
T3 Request for 05-10 Mustang GT Suspension Upgrades #27777suspension & brakesaddedsuspension & brakesT3 05-10 Mustang GT suspension upgrades allowed: strut tower brace, radiator, spring rate 500 lbs/in front 300 rear, sway bars, dampers, 40 mm restrictor, control arms, shock mounts, driveshaft options, bushings.
T3 Please Update the BMW SpecE46 Rules #27781wordingwordingT3 BMW SpecE46 updates to SpecE46 rules version 2.6 to 2.7; tyre size to 225 max.
T3 Request for 02-03 WRX Spec Line Parts #27864weight -100 lbsfasterweightT3 Subaru WRX 02-05 minimum weight drops 100 lbs to 3250.
T3 T4 RX8 Classification Error #27902cars addedaddedT3 and T4 Mazda RX-8 Base/R3 (04-12) reclassified to include Sport and GT variants.
T3 Request to add Toyota 86 GT to Spec Line #27910cars addedaddedToyota 86 GT variant (2017–) added to T3 and T4 spec lines.
FA Move wheel dimensions from Bodywork subsection to #27493wordingwordingFA wheel diameter and width specifications moved from Bodywork subsection to General section.
FA Table 2 Mazda MZR 2.0 E&O #27640wordingwordingFA Mazda MZR 2.0 engine use restricted to Ralt RT40, Ralt RT41, and Swift 014 chassis only.
T3 Request to add 2018 Subaru BRZ in T3 #27253cars addedaddedT3 Scion FR-S/Toyota 86 and Subaru BRZ year range extended from 13-17 to 13-20.
1:41.545Dario Cangialosi · fastest of 8 · top 5 within 2.8s
1:43.107Dario Cangialosi · fastest of 8 · top 5 within 1.8s
155.9Kent Vaccaro
2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s
2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s
119.8Jim Drago
+33.352squal +33.007s
132.3%qual 132.5%
2:04.918Marshall Mast · fastest of 20 · top 5 within 1.1s
2:05.354Broderick Bauguess · fastest of 20 · top 5 within 1.6s
138.2Scotty B White
+22.247squal +23.373s
121.6%qual 123.0%
2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s
2:03.900James Jost · fastest of 16 · top 5 within 2.1s
153.9James Jost
+20.793squal +21.393s
120.2%qual 121.1%
44 rule changes (FA: 7, SM: 4, T3: 29, AS: 4)11 cars added · 6 weight · 4 suspension & brakes · 3 engine · 2 tyres & wheels · 1 aero · 1 removed · 9 wording · 7 other · AS Spec Mustang (SMG) added as Restricted Prep class. · FA Honda Civic K20Z3 engine for Swift 014 and 016 chassis consolidated to single spec line with 1350 lbs minimum weight. · T3 Mazda NC MX-5 gains three alternate transmission gear ratio sets as options. · FA Swift 014 Mazda MZR 2.0 piston minimum weight drops from 320g to 280g; maximum dome height limit removed. · T2, T3, T4 spare tire and cover removal wording clarified; removable covers now explicitly allowable to remove. · AS class ride height minimum clarified: five inches measured at rocker panel, excluding seams and stock effects. · T3 2014-17 Volkswagen GTI gains sway bar spec, spring rate to 800 lb, turbo inlet restrictor 35 mm, R32 brakes, Stoptech 4-piston kit, ECS shield. · T3 BMW E36 M3 96-00 now allows alternate sway bars, 35mm front, 27mm rear. · AS Ford Mustang 79-93 non-Cobra drops 100 lbs to 3150; over 313 CID Cobra drops 100 lbs to 3450. · FA Line N minimum weight raised to 1375 lbs. · 09-12 Porsche Cayman added to T3 with 2900 cc engine, 3150 lbs minimum weight, 18×9 wheels, 245 tyres. · FA cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs. · T3 Chevrolet Camaro LT-I4 Turbo 1LE 2019- added: 1998 cc, 3450 lbs, 245 max tire, 18×10 wheels. · T3 Honda Civic Si 2017- minimum weight drops 100 lbs to 2900. · T3 Honda Civic Si 2017+ with alternate cage classified at 3075 lbs minimum weight with specified HPD parts and cage options. · T3 Volkswagen GTI 2014-2017 classified with 3080 lbs DSG, 3050 lbs manual, 35 mm turbo restrictor, 18×8.5 wheels, 245 tyres. · T3 adds BMW E36 M3 96-00 BMWCCA I Sport, 3152cc, 3100 lbs, 18-inch wheels, 245 tyres. · FA Formula 3 car transmission rules clarified: up to 6 forward gears, limited-slip differential, sequential removed, 25 lb penalty deleted. · SM fuel pump and filter now permitted as Mazda or OEM equivalent part. · T1-LP Ford Mustang GT 5.0L 2018- classified at 3400 lbs with 65mm restrictor, T2 and T3 Mustangs limited to 2015-2017. · 2015+ Subaru WRX classified in T3 at 1998cc, 3275 lbs minimum, 245/18 tires, 35mm turbo inlet restrictor required. · T4 and T3 Mazda MX-5 hardtop rules clarified: any OEM or aftermarket top permitted if retaining OEM silhouette; specific part numbers listed. · T3 Mazda MX-5 NC 06-15 wheel width increases from 7 to 8 inches. · T3 Mazda MX-5 NC 06-15 now allows any aftermarket header. · T3 Saturn Sky intercooler intake diameter increases to 35mm TIR; new calipers and spring rate limits added. · T2, T3, T4 now allow any thermostat serving original equipment intent only. · Subaru Legacy GT/Spec B 05–09 added to T3 with 2457cc, 18×9 wheels, 245 tires, 3300 lbs minimum. · T3 and T4 Mazda MX-5 Miata eligibility capped at 2016–2018 model years. · AS adds Spec Mustang SMG classification with 107.1 wheelbase, 3.73 gears, 355mm front and 300mm rear brakes. · FA Swift 014-Mazda MZR 2.0 engine no longer sealed by Elite Engines; block, crank, rods, head, cams, manifold now specified with part numbers and dimensions. · FA Swift 016 Mazda 2.3 and 2.5 liter minimum weight increases 30 lbs to 1450. · SM allows factory Mazda ECU and injector harnesses (P/N 0000-10-020E-99, 0000-10-080D-99) on 1999–2000 model year cars, unmodified. · SM electrical rules reorganized and clarified; alternator now externally regulated only by OEM ECU or master kill switch; harness repair by splicing permitted. · SM tire tread protrusion language removed from GCR 9.1.7.C.5. · T3 Mazdaspeed 3 07-09 front brake disc grows to 320mm vented, rear to 300mm solid. · T4 Celica GT wheelbase 2600 and 15x7 wheels added; Forte years narrowed; Fiesta ST starts 2014; Fiat 124 years 16-18 added; battery rule clarified. · T3 BMW SpecE46 must conform to Version 2.6 Effective Jan 1, 2019; Appendix N removed from GCR. · T3 Nissan 350Z 03-08 and Spec Z permitted to use Nissan brake kit part number 41000-BRKIT. · T1–T4 spec car classifications clarified with permitted parts, rule conformance versions, and exclusions of other touring modifications. · T2–T4 subframe bushings now permitted to be replaced with non-spherical bushings of any material. · T3: 24 cars lose 50–75 lbs across multiple models, including Camaro, Mustang, Miata, WRX, 370Z, GTI, and others. · T3 Ford Mustang EcoBoost gains two alternate brake kit options: Ford Motorsports 6-piston M2300V 380mm with 100lb penalty, or Brembo 2-piece 355mm rotor with 100lb penalty. · T3 FR-S/86 and BRZ: wheels to 17×9, tyres to 255, weight to 2750 lbs, final drive 4.10 or 4.30. · T3 BMW SpecE46 gains alternate tire option: any DOT up to 225 width permitted.showhide
AS Request to add SMG to 9.1.6.B.1 AS Intent #27140cars addedaddedAS Spec Mustang (SMG) added as Restricted Prep class.
FA Follow up to Letter #27344 on Honda Powered FA Rules #27363removedremovedFA Honda Civic K20Z3 engine for Swift 014 and 016 chassis consolidated to single spec line with 1350 lbs minimum weight.
T3 Request Mazda NC MX-5 alternate transmission gear ratios #27155otheraddedT3 Mazda NC MX-5 gains three alternate transmission gear ratio sets as options.
FA Swift 014 Mazda MZR 2.0 E&O #27305enginefasterengineFA Swift 014 Mazda MZR 2.0 piston minimum weight drops from 320g to 280g; maximum dome height limit removed.
T3 Request spare tire/wheel clarification #27012wordingfasterT2, T3, T4 spare tire and cover removal wording clarified; removable covers now explicitly allowable to remove.
AS Request Ride Height Clarification #26598wordingwordingAS class ride height minimum clarified: five inches measured at rocker panel, excluding seams and stock effects.
T3 Request guidance for 2014-2017 MK7 Volkswagen GTI #26866otheraddedT3 2014-17 Volkswagen GTI gains sway bar spec, spring rate to 800 lb, turbo inlet restrictor 35 mm, R32 brakes, Stoptech 4-piston kit, ECS shield.
T3 Request BMW e36 M3 sway bar and links #26885suspension & brakesaddedsuspension & brakesT3 BMW E36 M3 96-00 now allows alternate sway bars, 35mm front, 27mm rear.
AS Request to Revert to 2017 Weights #25885weightfasterweightAS Ford Mustang 79-93 non-Cobra drops 100 lbs to 3150; over 313 CID Cobra drops 100 lbs to 3450.
FA Adjust Line N restrictor size and minimum weight #26691weight +30 lbsslowerweightFA Line N minimum weight raised to 1375 lbs.
T3 Request to properly class base Porsche Cayman #26276cars addedadded09-12 Porsche Cayman added to T3 with 2900 cc engine, 3150 lbs minimum weight, 18×9 wheels, 245 tyres.
FA Add data plate requirement #26707otheraddedFA cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs.
T3 Request to classify a 2019 Chevrolet Camaro LT-I4 Turbo 1LE #25731cars addedaddedT3 Chevrolet Camaro LT-I4 Turbo 1LE 2019- added: 1998 cc, 3450 lbs, 245 max tire, 18×10 wheels.
T3 T3 Civic Si weight change #26294weightfasterweightT3 Honda Civic Si 2017- minimum weight drops 100 lbs to 2900.
T3 Class Civic Si 2017+ w/ alternate cage #26449cars addedaddedT3 Honda Civic Si 2017+ with alternate cage classified at 3075 lbs minimum weight with specified HPD parts and cage options.
T3 Classify 2014-2017 MK7 Volkswagen GTI for T3 #26695cars addedaddedT3 Volkswagen GTI 2014-2017 classified with 3080 lbs DSG, 3050 lbs manual, 35 mm turbo restrictor, 18×8.5 wheels, 245 tyres.
T3 Request to allow E36 M3 in T3 prepared to BMWCCA I sport #25195cars addedaddedT3 adds BMW E36 M3 96-00 BMWCCA I Sport, 3152cc, 3100 lbs, 18-inch wheels, 245 tyres.
FA Request to add FA engine spec lines #26183wordingwordingFA Formula 3 car transmission rules clarified: up to 6 forward gears, limited-slip differential, sequential removed, 25 lb penalty deleted.
SM Request to allow aftermarket fuel filters. #26370otheraddedSM fuel pump and filter now permitted as Mazda or OEM equivalent part.
T3 Request Mustang GT Limited Prep 2018 Classification #24431cars addedaddedT1-LP Ford Mustang GT 5.0L 2018- classified at 3400 lbs with 65mm restrictor, T2 and T3 Mustangs limited to 2015-2017.
T3 Classify 2015+ WRX #25832cars addedadded2015+ Subaru WRX classified in T3 at 1998cc, 3275 lbs minimum, 245/18 tires, 35mm turbo inlet restrictor required.
T3 Correct Mazda MX-5 Hard Top Notes #26137wordingwordingT4 and T3 Mazda MX-5 hardtop rules clarified: any OEM or aftermarket top permitted if retaining OEM silhouette; specific part numbers listed.
T3 Request to allow T3 06-15 Miata 17x8 wheels #26161tyres & wheelsfastertyres & wheelsT3 Mazda MX-5 NC 06-15 wheel width increases from 7 to 8 inches.
T3 Request T3 06-15 Miata header #26162otheraddedT3 Mazda MX-5 NC 06-15 now allows any aftermarket header.
T3 Request Pontiac GXP same allowances to Saturn Sky #26175aeroaddedaeroT3 Saturn Sky intercooler intake diameter increases to 35mm TIR; new calipers and spring rate limits added.
T3 Consider opening class rules to allow any thermostat #26187engineaddedengineT2, T3, T4 now allow any thermostat serving original equipment intent only.
T3 2005-2009 Legacy GT/Spec B #26384cars addedaddedSubaru Legacy GT/Spec B 05–09 added to T3 with 2457cc, 18×9 wheels, 245 tires, 3300 lbs minimum.
T3 Cap 2016 Mazda Miata year at 2018 #26388cars addedremovedcars addedT3 and T4 Mazda MX-5 Miata eligibility capped at 2016–2018 model years.
AS SMG Mustang eligibility in American sedan #26224cars addedaddedAS adds Spec Mustang SMG classification with 107.1 wheelbase, 3.73 gears, 355mm front and 300mm rear brakes.
FA FA MZR 2.0 Engine Specification #25814engineengineFA Swift 014-Mazda MZR 2.0 engine no longer sealed by Elite Engines; block, crank, rods, head, cams, manifold now specified with part numbers and dimensions.
FA FA 016 weight increase #26063weightslowerweightFA Swift 016 Mazda 2.3 and 2.5 liter minimum weight increases 30 lbs to 1450.
SM Request 99-00 replacement Wire harnesses #25602otheraddedSM allows factory Mazda ECU and injector harnesses (P/N 0000-10-020E-99, 0000-10-080D-99) on 1999–2000 model year cars, unmodified.
SM Organize and Clarify 9.1.7.C.1.o. #25913wordingwordingSM electrical rules reorganized and clarified; alternator now externally regulated only by OEM ECU or master kill switch; harness repair by splicing permitted.
SM Strike Tire Tread Language #26123wordingremovedSM tire tread protrusion language removed from GCR 9.1.7.C.5.
T3 Request correction on brake sizes #26170suspension & brakessuspension & brakesT3 Mazdaspeed 3 07-09 front brake disc grows to 320mm vented, rear to 300mm solid.
T3 Errors, Omissions, and Updates (Various) #22414wordingwordingT4 Celica GT wheelbase 2600 and 15x7 wheels added; Forte years narrowed; Fiesta ST starts 2014; Fiat 124 years 16-18 added; battery rule clarified.
T3 Request to update SpecE46 Appendix N. with 2019 Rules #25722wordingunclearT3 BMW SpecE46 must conform to Version 2.6 Effective Jan 1, 2019; Appendix N removed from GCR.
T3 Request Alternative Nissan Brake Parts - 350Z #25747otheraddedT3 Nissan 350Z 03-08 and Spec Z permitted to use Nissan brake kit part number 41000-BRKIT.
T3 Add Clarification to Spec Car Classifications Vehicle Spec #25774wordingwordingT1–T4 spec car classifications clarified with permitted parts, rule conformance versions, and exclusions of other touring modifications.
T3 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakesaddedsuspension & brakesT2–T4 subframe bushings now permitted to be replaced with non-spherical bushings of any material.
T3 Additional weight adjustments for T3 cars T3 weight loss #25803weightfasterweightT3: 24 cars lose 50–75 lbs across multiple models, including Camaro, Mustang, Miata, WRX, 370Z, GTI, and others.
T3 Request for Alternate EcoBoost Mustang Brakes #25813suspension & brakesaddedsuspension & brakesT3 Ford Mustang EcoBoost gains two alternate brake kit options: Ford Motorsports 6-piston M2300V 380mm with 100lb penalty, or Brembo 2-piece 355mm rotor with 100lb penalty.
T3 Request to Add the FR-S/86 and BRZ Spec Lines to T3 #25888weightfasterweightT3 FR-S/86 and BRZ: wheels to 17×9, tyres to 255, weight to 2750 lbs, final drive 4.10 or 4.30.
T3 Request to Clarify BMW SpecE46 Tire Verbiage #26027tyres & wheelsaddedtyres & wheelsT3 BMW SpecE46 gains alternate tire option: any DOT up to 225 width permitted.
Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of FA's best on the same day: the weather and the day cancel out, so one figure compares across years where lap times cannot; a class that suits one track more than another still reads differently there. It still moves when the yardstick's own balance changes or its field thins, and an event the yardstick did not run has no point. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.