Lap times across years say as much about the weather as the class. % of P2 is each class's best lap as a share of P2'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:P2 100.0% of P2 Jeff Shafer, Daytona International Speedway Runoffs 2015 race · T3 79.6% of P2 Mark Drennan, Sonoma Raceway Runoffs 2018 qualifying · SM 102.4% of P2 Travis Wiley, Virginia International Raceway Runoffs 2022 race · GTL 103.9% of P2 Michael Lewis, Virginia International Raceway Runoffs 2022 race
P2T3SMGTLsolid race · dashed qualifying · slower is lower
P2T3SMGTLsolid race · dashed qualifying · each class's best lap as a share of P2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
2:10.606Greg Gyann · fastest of 11 · top 5 within 5.3s+3.201s (+2.51%)
2:09.441Mike Reupert · fastest of 11 · top 5 within 4.2s+1.119s (+0.87%)
155.0Matt Strand+2.4 mph (+1.6%)
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%)
+18.099squal +17.284s
114.0%qual 113.2%
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%)
+33.284squal +31.567s
125.7%qual 124.2%
35 rule changes (T3: 32, SM: 2, GTL: 1)7 tyres & wheels · 7 weight · 5 suspension & brakes · 3 cars added · 2 induction · 2 removed · 1 aero · 2 wording · 6 other · SM/SMX Mazda rear toe link part number revised from 0000-04-5361426 to 0000-04-5361. · SM/SMX part number 0000-10-6900 replaced with 0000-06-5016-KT in GCR 9.1.7.C.1.j.1.c. · GT3U class removed from GCR; GT3U cars now compete in STU. · T2-T4 adjustable toe links now allow performance alternative bushings and spherical bearings, previously only spherical bearings permitted. · 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. · 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
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.
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.
T3 T3 Ecoboost Mustang clarification #39236suspension & brakes
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.
2:28.676Nic 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%)
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%)
32 rule changes (P2: 1, T3: 24, SM: 4, GTL: 3)6 cars added · 4 weight · 3 engine · 3 induction · 2 tyres & wheels · 1 removed · 9 wording · 4 other · T2, T3, T4 spec table header changed from T2 to ET. · 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. · 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. · Ford SCCA Club Spec Mustang added to T3 at 3350 lbs; Mazda SCCA Club Spec MX-5 added to T4 at 2500 lbs. · TA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof height limit. · T2, T3, T4: nine, nine, and thirty-seven expired spec lines removed effective 2025-01-01. · P2 2000 cc Pinto engine car minimum weight set to 1335 lbs. · 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. · GTL Toyota G16E-GTS removes direct injection prohibition, allowing direct injection engines. · GTL L16 limited prep gains 32mm choke option at 1910 lbs, compression capped 12.0:1, valve lift .450 max.showhide
T3 Incorrect Touring Heading #38451wordingwordingT2, T3, T4 spec table header changed from T2 to ET.
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.
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.
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.
GTL Correct language regarding OEM Areo Devices #37137wordingwordingTA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof height limit.
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
P2 2000 cc Pinto Engine Car Weight #37187weightslowerweightP2 2000 cc Pinto engine car minimum weight set to 1335 lbs.
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.
GTL G16E-GTS Fuel Injection Spec Line Change #36588engineaddedengineGTL Toyota G16E-GTS removes direct injection prohibition, allowing direct injection engines.
GTL GTL Alternate Weight and Choke Option for L16 engine #36653engineaddedengineGTL L16 limited prep gains 32mm choke option at 1910 lbs, compression capped 12.0:1, valve lift .450 max.
2:07.405Bart Wolf · fastest of 14 · top 5 within 3.0s-1.109s (-0.86%)
2:08.322Bart Wolf · fastest of 13 · top 5 within 0.6s-1.471s (-1.13%)
152.5Lucian Pancea-0.6 mph (-0.4%)
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%)
+20.869squal +18.045s
116.3%qual 114.2%
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%)
+33.164squal +33.701s
125.8%qual 126.5%
2:30.858Peter Shadowen · fastest of 14 · top 5 within 4.4s-1.085s (-0.71%)
2:30.844Chris Bovis · fastest of 13 · top 5 within 3.7s-0.757s (-0.50%)
133.3Peter Shadowen+1.8 mph (+1.4%)
+22.522squal +23.453s
117.6%qual 118.4%
66 rule changes (P2: 5, T3: 41, SM: 4, GTL: 16)15 cars added · 8 induction · 8 weight · 6 engine · 4 suspension & brakes · 2 aero · 2 tyres & wheels · 12 wording · 9 other · GTL adds Toyota GR86 2021–2023, 2dr RWD, 101.3 in wheelbase. · GTL adds Spec Miata 1990–2005 with legal Spec Miata engine and intake system. · GTL adds Mazda MX5 RF 2017- model with 91.0 in wheelbase. · 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. · GTL added to GT3 choke option line in GCR 9.1.2.E.13.n. · 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. · GT2-ST Acura NSX minimum weight rises to 3000 lbs, restrictor increases to 45mm TIR. · GTL Datsun 510 Limited Prep fuel induction increased to 34 mm chokes, minimum weight rises to 2000 lbs. · P2 Spec Line E engine notes clarify oil system, ECU, and exhaust remain unrestricted; wording only. · P2 FIA Group CN notes clarify V de V European Proto Endurance Challenge bodywork, rear diffuser, wing, wheels, assisted shifting allowed; regulations link provided. · 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. · 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. · GT1-GTX rear blade spoiler: angle 50–75°, max 59.0 wide by 5.0 high inches; total area limit removed. · GT1, GT2, GT3, GTL, GTX Direct Injection now permitted if original equipment. · GT2 Nissan and GT3 Mazda, Mitsubishi 4G93, Nissan QR25DE/DD, QE25DE/DD now permit Direct Injection per 9.1.2.F.7.5.E. · 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. · GTL 12A rotary engines may machine and use 13B housing to O.E. 12A spec across all port types. · GTL Toyota DR86 2021–2024 added to class. · GTL BMW Mini model years changed to 2002-2013. · P2 AMAC and related cars: clarified B.1 modified engine range to 2008 and older stock engines only, with 38mm restrictor and 1025 lbs minimum weight. · P2 Suzuki GSX-R1000 engine: 2007–2008 crankcase 11300-21860 may be replaced with 2016–2019 GSX-S1000 part 11301-04840. · 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. · GTL small unrestricted engines under 1399cc lose 38–79 lbs across Alfa, AMC, Triumph, Mini, Sprite, Fiat, Ford, Honda, Mazda, Nissan, Subaru, Toyota, Volkswagen. · GTL Honda Fit 2009-13 2-door FWD added with 99.0 in wheelbase, alternate 94.0 and 97.0 in. · GTL spec lines moved contiguous with GT2 and GT3; GTA category and specs renumbered behind GTL; P2 engine tables reorganised with restrictor and weight specifications clarified. · P2 Table 1 engine date ranges clarified: Stock Engine replaced with specific marques Suzuki, Yamaha, Honda, BMW for 2009-newer and 2008-older rows. · 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. · GTL Nissan Sentra/200SX A 1400 minimum weight reduced to 1800 lbs.showhide
GTL Request to Include Toyota GR86 in GTL #36324cars addedaddedGTL adds Toyota GR86 2021–2023, 2dr RWD, 101.3 in wheelbase.
GTL Inclusion of Modified Spec Miata for GTL competition #36325cars addedaddedGTL adds Spec Miata 1990–2005 with legal Spec Miata engine and intake system.
GTL Include Mazda MX5 RF 2017- in GTL #36428cars addedaddedGTL adds Mazda MX5 RF 2017- model with 91.0 in wheelbase.
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.
GTL Add GTL to GT3 choke option line. #36236otheraddedGTL added to GT3 choke option line in GCR 9.1.2.E.13.n.
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.
GTL Request for Spec Line 1010 Reconsideration #35009weight +300 lbsslowerweightGT2-ST Acura NSX minimum weight rises to 3000 lbs, restrictor increases to 45mm TIR.
GTL Allow 34 mm chokes for the Datsun 510 #35661induction +50 lbsfasterinductionGTL Datsun 510 Limited Prep fuel induction increased to 34 mm chokes, minimum weight rises to 2000 lbs.
P2 CN Spec ECU #35835wordingwordingP2 Spec Line E engine notes clarify oil system, ECU, and exhaust remain unrestricted; wording only.
P2 E&O - Correct FIA Group CN spec line notes #35900wordingwordingP2 FIA Group CN notes clarify V de V European Proto Endurance Challenge bodywork, rear diffuser, wing, wheels, assisted shifting allowed; regulations link provided.
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.
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.
GTL Rear Blade Spoiler Clarification #35261aeroaeroGT1-GTX rear blade spoiler: angle 50–75°, max 59.0 wide by 5.0 high inches; total area limit removed.
GTL GT Direct Injection allowance and rules #35437engineaddedengineGT1, GT2, GT3, GTL, GTX Direct Injection now permitted if original equipment.
GTL GT2/3 remove Direction Injection not allowed in Spec line notes #35439engineaddedengineGT2 Nissan and GT3 Mazda, Mitsubishi 4G93, Nissan QR25DE/DD, QE25DE/DD now permit Direct Injection per 9.1.2.F.7.5.E.
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.
GTL Rotary Engine 12A Rotor Housings #35131engineaddedengineGTL 12A rotary engines may machine and use 13B housing to O.E. 12A spec across all port types.
GTL Request to Include Toyota GR86 in GTL #35198cars addedaddedGTL Toyota DR86 2021–2024 added to class.
GTL Errors and Omissions, GTL engines & Cars #35226wordingwordingGTL BMW Mini model years changed to 2002-2013.
P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225wordingwordingP2 AMAC and related cars: clarified B.1 modified engine range to 2008 and older stock engines only, with 38mm restrictor and 1025 lbs minimum weight.
P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engineaddedengineP2 Suzuki GSX-R1000 engine: 2007–2008 crankcase 11300-21860 may be replaced with 2016–2019 GSX-S1000 part 11301-04840.
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.
GTL Small Engines in GT Lite #34842weightfasterweightGTL small unrestricted engines under 1399cc lose 38–79 lbs across Alfa, AMC, Triumph, Mini, Sprite, Fiat, Ford, Honda, Mazda, Nissan, Subaru, Toyota, Volkswagen.
GTL Request to Classify Honda Fit body in GTL #35020cars addedaddedGTL Honda Fit 2009-13 2-door FWD added with 99.0 in wheelbase, alternate 94.0 and 97.0 in.
GTL Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453wordingwordingGTL spec lines moved contiguous with GT2 and GT3; GTA category and specs renumbered behind GTL; P2 engine tables reorganised with restrictor and weight specifications clarified.
P2 Correct Table 1 for Engine Date Range Specifications #35182wordingwordingP2 Table 1 engine date ranges clarified: Stock Engine replaced with specific marques Suzuki, Yamaha, Honda, BMW for 2009-newer and 2008-older rows.
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.
GTL Weight for Nissan Sentra/200SX A 1400's #34918weight -50 lbsfasterweightGTL Nissan Sentra/200SX A 1400 minimum weight reduced to 1800 lbs.
1:48.590Greg Gyann · fastest of 12 · top 5 within 1.7s+1.024s (+0.95%)
1:48.829Lucian Pancea · fastest of 11 · top 5 within 0.9s-27.005s (-19.88%)
150.9Lucian Pancea-0.2 mph (-0.2%)
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%)
+17.025squal +15.930s
115.6%qual 114.7%
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%)
+27.400squal +26.396s
125.2%qual 124.3%
2:09.564Peter Shadowen · fastest of 11 · top 5 within 4.9s+1.775s (+1.39%)
2:11.277Graham Fuller · fastest of 10 · top 5 within 2.4s-9.903s (-7.01%)
142.7Peter Shadowen+6.7 mph (+4.9%)
+22.448squal +20.974s
120.6%qual 119.3%
44 rule changes (P2: 8, T3: 28, SM: 1, GTL: 7)12 cars added · 8 weight · 3 engine · 3 suspension & brakes · 2 tyres & wheels · 1 aero · 1 induction · 10 wording · 4 other · 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. · 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. · Fields Cardinal V8 added to GT1 with Ford V8 engine, 4.9L, 2100 lbs, fuel injection. · P2 minimum side body height must equal front axle centerline height, viewed from side. · P2 closed cockpit single seat cars now prohibited unless Table 1 spec line permits. · 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. · P2 engine table spec line B.1 redundant effective date language removed and table updated. · P2 motorcycle restrictor reduced 35mm to 34mm for 2011+ Kawasaki; minimum weights increased to 1100 lbs for 2009+ engines; cockpit length corrected to 23.622 inches. · 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. · GTL 3K, 4K, 5K Toyota engines may now use 4Y block only. · 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. · GT2 and GTL add Toyota 4A-F and 4A-FE 1.6L DOHC 16V engines as permitted options. · Sebeco NP01-EVO and Elan NP01 added to P2 with Mazda 2.0L MZR, no restrictor required, 1600 lb minimum weight. · P2 Radical SR3/SR4, Cup, Club Sport, Pro-Sport, PR6: assisted shifting clarified from A-assisted to Aassisted; Cup engine restrictor changed from Unrestricted to Not required. · P2 chassis now allows composite materials partially installed; anti-intrusion panels attachment simplified; Stohr and converted models clarified. · 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. · GTL Fiat X1/9 1500 Limited Prep minimum weight increases to 2000 lbs from 1835 lbs. · GT2 TA2 and GTA throttle body part numbers updated to GM 12570790 or Edelbrock 33869/3870. · GTL adds Ford Festiva 1988-1993 FWD hatchback with Mazda B3 1324cc engine. · T3 Solstice GXP gains hardtop, suspension, spoiler, Cobalt brakes, aftermarket top, intercooler alternatives, and 4-piston calipers. · GTL adds Toyota G16E-GTS 1618cc DOHC 3-cyl engine, 1945 lbs, SIR, no turbo or direct injection. · 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
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.
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.
GTL Please classify Fields Cardinal V8 #33784cars addedaddedFields Cardinal V8 added to GT1 with Ford V8 engine, 4.9L, 2100 lbs, fuel injection.
P2 Clarify minimum side body height requirement #34143wordingwordingP2 minimum side body height must equal front axle centerline height, viewed from side.
P2 Clarify closed cockpit single seat car allowance #34144wordingwordingP2 closed cockpit single seat cars now prohibited unless Table 1 spec line permits.
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.
P2 Remove redundant effective date language and update engine table #34012wordingwordingP2 engine table spec line B.1 redundant effective date language removed and table updated.
P2 E&O - Correct dimensional equivalents #34038enginefasterengineP2 motorcycle restrictor reduced 35mm to 34mm for 2011+ Kawasaki; minimum weights increased to 1100 lbs for 2009+ engines; cockpit length corrected to 23.622 inches.
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.
GTL Toyota 4Y Engine Classification Request #33562engineaddedengineGTL 3K, 4K, 5K Toyota engines may now use 4Y block only.
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.
GTL Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415cars addedaddedGT2 and GTL add Toyota 4A-F and 4A-FE 1.6L DOHC 16V engines as permitted options.
P2 Request to Classify Sebeco NP01 #33378cars addedaddedSebeco NP01-EVO and Elan NP01 added to P2 with Mazda 2.0L MZR, no restrictor required, 1600 lb minimum weight.
P2 Radical spec line clarifications #33485wordingwordingP2 Radical SR3/SR4, Cup, Club Sport, Pro-Sport, PR6: assisted shifting clarified from A-assisted to Aassisted; Cup engine restrictor changed from Unrestricted to Not required.
P2 E&O original class intent #33519wordingwordingP2 chassis now allows composite materials partially installed; anti-intrusion panels attachment simplified; Stohr and converted models clarified.
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.
GTL Fiat HP Limited Prep X1/9 Weight in GTL #33297weightslowerweightGTL Fiat X1/9 1500 Limited Prep minimum weight increases to 2000 lbs from 1835 lbs.
GTL GT2 (TA2)/GTA Part Number Update #33315wordingwordingGT2 TA2 and GTA throttle body part numbers updated to GM 12570790 or Edelbrock 33869/3870.
GTL Request to add Ford Festiva to GTL #33335cars addedaddedGTL adds Ford Festiva 1988-1993 FWD hatchback with Mazda B3 1324cc engine.
T3 Solstice GXP in T3 #33501cars addedaddedT3 Solstice GXP gains hardtop, suspension, spoiler, Cobalt brakes, aftermarket top, intercooler alternatives, and 4-piston calipers.
GTL Engine Request #33064cars addedaddedGTL adds Toyota G16E-GTS 1618cc DOHC 3-cyl engine, 1945 lbs, SIR, no turbo or direct injection.
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.
1:47.566Tim Day Jr · fastest of 12 · top 5 within 3.0s-1.545s (-1.42%)
2:15.834Greg Gyann · fastest of 12 · top 5 within 10.1s+25.576s (+23.20%)
151.1Robert Iversen+1.8 mph (+1.2%)
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%)
+11.792squal +16.657s
108.7%qual 115.5%
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%)
+3.273squal +27.098s
102.4%qual 125.2%
2:07.789Peter Shadowen · fastest of 14 · top 5 within 2.2s+0.792s (+0.62%)
2:21.180Michael Lewis · fastest of 13 · top 5 within 2.1s+13.343s (+10.44%)
136.0Peter Shadowen+4.9 mph (+3.7%)
+5.346squal +20.223s
103.9%qual 118.8%
45 rule changes (P2: 10, T3: 31, SM: 1, GTL: 3)11 cars added · 8 weight · 4 suspension & brakes · 2 aero · 1 engine · 1 tyres & wheels · 15 wording · 3 other · GT1, GT2, GT3, GTL, GTX tail lights may now be original style or custom panel graphic with functioning red LED brake lamps. · 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. · 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. · P2 chassis construction clarified: full composite allowed; partial composite must roll without composite parts installed. · P2 classification wording cleaned up in GCR section 9.1.8.C and GCR contents. · 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. · P2 Oldsmobile cam rules correct spelling from 'after market' to 'aftermarket' in two sections. · 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. · Ginetta G40 added to GTL with Ford Zetec 1796cc engine, 2050 lbs minimum weight, 22.5mm SIR. · P2 adds Beasley B2 at 1350 lbs with Mazda 12A, 40.5mm venturi, and up to 16.5in wing chord. · P2 wings: terminology change from 'cord' to 'chord', and 'only' removed from Bobsy and Jondal notes. · P2 Converted F5 cars renamed F500, must retain F500 suspension, minimum width 55 inches. · 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. · P2 motorcycle engines gain 5cc to 1505cc max, two-stroke gains 5cc to 1205cc max, automotive engines add 50 lbs minimum weight to 1350 lbs. · P2 Control Area definition clarified: rectangular zone from rear edge of front tires to front edge of rear tires, full car width. · 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. · P2 specification line B.1 engine table entry amended; details of change not provided in excerpt. · P2 Control Area definition clarified: rear tire edge and front tire edge bounds, car's lower surface width, floor extensions and aerodynamic attachments included, vertical structures prohibited. · 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. · GT3 Volkswagen Fun Cup Beetle EVO3 classified, sealed SOHC 1984cc engine, 2060 lbs minimum weight.showhide
GTL Tail lights on all GT category race cars. #32799wordingwordingGT1, GT2, GT3, GTL, GTX tail lights may now be original style or custom panel graphic with functioning red LED brake lamps.
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.
P2 E&O Clarification of Chassis Construction Requirements #32469wordingwordingP2 chassis construction clarified: full composite allowed; partial composite must roll without composite parts installed.
P2 Clean up P2 wording #32525wordingwordingP2 classification wording cleaned up in GCR section 9.1.8.C and GCR contents.
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.
P2 After Market to Aftermarket #32373wordingwordingP2 Oldsmobile cam rules correct spelling from 'after market' to 'aftermarket' in two sections.
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.
GTL Request to Classify Ginetta G40 in GTL #31599cars addedaddedGinetta G40 added to GTL with Ford Zetec 1796cc engine, 2050 lbs minimum weight, 22.5mm SIR.
P2 Add spec line for Beasley B2 #32147cars addedaddedP2 adds Beasley B2 at 1350 lbs with Mazda 12A, 40.5mm venturi, and up to 16.5in wing chord.
P2 E&O Table 1 spec line wing terminology #32148wordingwordingP2 wings: terminology change from 'cord' to 'chord', and 'only' removed from Bobsy and Jondal notes.
P2 E&O class name #32196wordingwordingP2 Converted F5 cars renamed F500, must retain F500 suspension, minimum width 55 inches.
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.
P2 E&O Engine section #31969weightslowerweightP2 motorcycle engines gain 5cc to 1505cc max, two-stroke gains 5cc to 1205cc max, automotive engines add 50 lbs minimum weight to 1350 lbs.
P2 E&O letter #31539 – Control Area definition #31783wordingwordingP2 Control Area definition clarified: rectangular zone from rear edge of front tires to front edge of rear tires, full car width.
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.
P2 BoP adjustment effective 1-1-22 #31538otherunclearP2 specification line B.1 engine table entry amended; details of change not provided in excerpt.
P2 E&O clarification of "Control Area" definition #31539wordingwordingP2 Control Area definition clarified: rear tire edge and front tire edge bounds, car's lower surface width, floor extensions and aerodynamic attachments included, vertical structures prohibited.
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.
GTL Request car classification #31032cars addedaddedGT3 Volkswagen Fun Cup Beetle EVO3 classified, sealed SOHC 1984cc engine, 2060 lbs minimum weight.
1:33.235Tim Day Jr · fastest of 16 · top 5 within 3.3s+1.409s (+1.53%)
1:35.322Tim Day Jr · fastest of 10 · top 5 within 4.8s+2.841s (+3.07%)
150.3Robert Iversen
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
+17.379squal +18.356s
118.2%qual 119.7%
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
+23.515squal +24.460s
124.7%qual 126.2%
1:51.819Christopher Bovis · fastest of 22 · top 5 within 1.8s+1.488s (+1.35%)
1:51.952Scott Twomey · fastest of 19 · top 5 within 1.7s-0.116s (-0.10%)
129.5Brian Linn
+16.630squal +18.584s
117.4%qual 119.9%
36 rule changes (P2: 8, T3: 19, SM: 1, GTL: 8)10 cars added · 4 weight · 3 tyres & wheels · 2 aero · 2 engine · 2 induction · 9 wording · 4 other · P2 CN Honda K20A-FD2 engine rebuild clarified: balancing, porting, polishing prohibited; valve jobs and honing must follow factory procedures. · GTA part numbers updated: 0-80541-1 to 0-80541-2 in two locations and 6010 to 6014X in TA2 Appendix. · P2 Converted F5 cars must retain F5 suspension and meet P2 non-spec requirements except minimum width is 55 inches. · P2 minimum body width clarified: cannot extend inward beyond vertical plane through tire centerlines. · GTL Honda B18 split into B18A/B at 1797 cc 2050 lbs and B18C at 1834 cc 2065 lbs. · GTL Nissan B13 Sentra may have hood bulge maximum 1.5 inches high by 10.0 long by 6.0 wide. · unclear · 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. · T3 Honda Civic Type-R 2020+ allowed brake rotor #45251-TGH-A01 with 25 lb penalty. · P2 tonneau covers now allowed to meet minimum dimensions; cockpit equipment attachment wording clarified. · P2 removes effective date 01/01/2021 from six car spec lines in Table 1. · P2 engine specs B.1, B.2, B.3 limited to maximum 4 valves per cylinder. · 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. · 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. · GTL Mazda 12A SIR increases to 29mm, minimum weight rises to 2000 lbs, 28mm SIR option with 175 lb penalty removed. · P2 adds new spec line for 2-cycle 3-cylinder engine up to 820cc with 10 front, 14–15 rear wheel width. · GTL adds FIAT X-1/9 Bertone 1500 SOHC, 1498 cc, 2000 lbs, fuel injection or carburetors permitted. · 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. · GTL Nissan MRA8DE 1.8L engine added, 1797 cc, DOHC, 2050 lbs minimum weight. · GTL Mazda 13B SIR increases from 26 mm to 28 mm; 27 mm option with 175 lbs removed. · 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. · P2 motorcycle-engine cars: 2009+ stock 37mm restrictor, 2008- stock 35mm, modified 1075 lbs. Honda K20A 50mm restrictor. Various spec cars: restrictors increased or decreased 0.5–3mm. · T3 Alfa Romeo 4C Launch Edition variant now allowed.showhide
P2 P2 CN Engine Rebuild Clarification #31000wordingwordingP2 CN Honda K20A-FD2 engine rebuild clarified: balancing, porting, polishing prohibited; valve jobs and honing must follow factory procedures.
GTL Request to Update GTA Obsolete Part Numbers #30615wordingwordingGTA part numbers updated: 0-80541-1 to 0-80541-2 in two locations and 6010 to 6014X in TA2 Appendix.
P2 F5 P2 Conversion #30856wordingwordingP2 Converted F5 cars must retain F5 suspension and meet P2 non-spec requirements except minimum width is 55 inches.
P2 Clarify minimum body width requirement #30859wordingwordingP2 minimum body width clarified: cannot extend inward beyond vertical plane through tire centerlines.
GTL Request clarification for the Honda B18a,bVS B18c #30482cars addedaddedGTL Honda B18 split into B18A/B at 1797 cc 2050 lbs and B18C at 1834 cc 2065 lbs.
GTL Request to Allow Hood Bulge on Nissan B13 Sentra #30504aeroaddedaeroGTL Nissan B13 Sentra may have hood bulge maximum 1.5 inches high by 10.0 long by 6.0 wide.
GTL Request BMW E21 Classing #30582otherunclearunclear
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.
T3 Civic Type R Brake Rotors #29817weightslowerweightT3 Honda Civic Type-R 2020+ allowed brake rotor #45251-TGH-A01 with 25 lb penalty.
P2 E&O tonneau cover provision in cockpit opening section #30459wordingwordingP2 tonneau covers now allowed to meet minimum dimensions; cockpit equipment attachment wording clarified.
P2 Remove effective dates in Table 1 #30468wordingwordingP2 removes effective date 01/01/2021 from six car spec lines in Table 1.
P2 E&O Maximum Valves Per Cylinder #30560engineengineP2 engine specs B.1, B.2, B.3 limited to maximum 4 valves per cylinder.
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.
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.
GTL Request for Help for Mazda 12A #29754induction +50 lbsslowerinductionGTL Mazda 12A SIR increases to 29mm, minimum weight rises to 2000 lbs, 28mm SIR option with 175 lb penalty removed.
P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272cars addedaddedP2 adds new spec line for 2-cycle 3-cylinder engine up to 820cc with 10 front, 14–15 rear wheel width.
GTL Request LP HP Fiat X1/9 & Bertone 1500 to GTL #30058cars addedaddedGTL adds FIAT X-1/9 Bertone 1500 SOHC, 1498 cc, 2000 lbs, fuel injection or carburetors permitted.
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.
GTL Increase 13b SIR size #29867inductionfasterinductionGTL Mazda 13B SIR increases from 26 mm to 28 mm; 27 mm option with 175 lbs removed.
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.
2:08.514Robert Iversen · fastest of 12 · top 5 within 3.0s
2:09.793Robert Iversen · fastest of 12 · top 5 within 3.9s
153.1Robert Iversen
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
+21.895squal +21.243s
116.9%qual 116.5%
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
+33.955squal +33.695s
126.2%qual 126.2%
2:31.943Chris Bovis · fastest of 14 · top 5 within 6.3s
2:31.601Peter Shadowen · fastest of 14 · top 5 within 7.2s
131.4Peter Shadowen
+21.808squal +23.429s
116.8%qual 118.2%
51 rule changes (P2: 6, T3: 26, SM: 2, GTL: 17)16 cars added · 6 suspension & brakes · 5 aero · 3 weight · 2 engine · 2 induction · 2 tyres & wheels · 13 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. · GT1/GT2/GT3/GTL/GTX turbocharging and supercharging now permitted if listed on spec line. · P2 rear wing rules clarified: standard wing 6×12 inches, end plates 14-inch square; alternate 1-meter formula wing 110cm wide, 9×18 inches, end plates 14×18 inches. · GTL Mazda 13B restrictor increases from 24mm to 26mm SIR, minimum weight rises to 2125 lbs, alternative 27mm SIR option adds 175 lbs. · 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. · GTL: Toyota MR2 Spyder 1999–2007 newly classified for GTL competition. · TA2 Gurney flap wording clarified: replace 'wicker bill' and 'wicker' with 'Gurney flap' throughout wing specifications. · STO rear wing rules clarify that wicker is called Gurney flap in two places; no performance change. · GT Gurney flap wording clarified: wickerbill and tab terminology replaced with Gurney flap throughout sections 9.1.2.F.7.b. · GTL Mazda 13B restrictor size addressed in response to letter 28518; see that letter for details. · 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. · GTL SIR stall test procedure clarified: system tested as raced, competitor must prevent air bypass behind restrictor. · Elan NP01 added to P2 Table 1 as Spec Line car with 2000cc displacement and 42mm restrictor. · 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. · GTL wing mount openings excluded from square inch area limit. · P2 Enterprises Sports Racer now permits 55mm flat plate intake restrictor Part # WM303013 as alternative to SIR. · 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. · P2 Enterprise Sports Racer 2.3L engine must use SIR or Flat Plate restrictor meeting peak horsepower, sized in whole or 0.5mm increments. · GTL wing mounting posts limited to 85 square inches exposed area each, measured flat from side view. · GTL wing mounting posts limited to 85 square inches each, measured flat from side view. · GTL wing endplates maximum area increased to 64 square inches from 8.5 by 3.0 inches rectangle. · GTL Mazda 12A street port minimum weight drops to 1950 lbs. · P2 electronic throttle control wording clarified: ETC permitted if stock ECU throttle pedal activates original throttle shaft mechanism. · 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. · GT1, GT2, GT3, GTL, GTX may use bonded-glass factory windshields without clips or straps if attached per original specifications. · 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. · GTX Misc. adds Factory Five Type 65 Coupe R Ford 302/351 and 5.0/5.2L NA at 2600 lbs, plus Ferrari 458/488 Challenge, Ford FP350S, Chevrolet C6, Lamborghini Super Trofeo. · GTL adds Jetta Mk1 two-door classification effective 2020-01-01. · P2 adds BMW to permitted motorcycle-based engines alongside Kawasaki, Suzuki, Yamaha, Honda. · 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. · GTL Honda CRX 84-87 and 88-91 lose permission to use IRS with 2.5% weight penalty. · 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.
GTL GT Category Wording #29193wordingaddedGT1/GT2/GT3/GTL/GTX turbocharging and supercharging now permitted if listed on spec line.
P2 E&O clarification of P2 rear wing requirements #29205aeroaeroP2 rear wing rules clarified: standard wing 6×12 inches, end plates 14-inch square; alternate 1-meter formula wing 110cm wide, 9×18 inches, end plates 14×18 inches.
GTL Request to change the Mazda 13b restrictor size #28518induction +175 lbsfasterinductionGTL Mazda 13B restrictor increases from 24mm to 26mm SIR, minimum weight rises to 2125 lbs, alternative 27mm SIR option adds 175 lbs.
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.
GTL Request to classify 1999-2007 Toyota MR2 Spyder body #28870cars addedaddedGTL: Toyota MR2 Spyder 1999–2007 newly classified for GTL competition.
GTL TA2 Gurney flap wicker clarification #28874wordingwordingTA2 Gurney flap wording clarified: replace 'wicker bill' and 'wicker' with 'Gurney flap' throughout wing specifications.
GTL STO Gurney flap wicker clarification #28883wordingwordingSTO rear wing rules clarify that wicker is called Gurney flap in two places; no performance change.
GTL GT Gurney flap wicker clarification #28909wordingwordingGT Gurney flap wording clarified: wickerbill and tab terminology replaced with Gurney flap throughout sections 9.1.2.F.7.b.
GTL Mazda 13b Restrictor Size Follow up to Letter 28518 #29015wordingunclearGTL Mazda 13B restrictor size addressed in response to letter 28518; see that letter for details.
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.
GTL Stall Test #28709wordingwordingGTL SIR stall test procedure clarified: system tested as raced, competitor must prevent air bypass behind restrictor.
P2 Classify Elan NP01 in P2 Table 1 #28812cars addedaddedElan NP01 added to P2 Table 1 as Spec Line car with 2000cc displacement and 42mm restrictor.
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.
GTL GTL Wing Rule #28754aeroaddedaeroGTL wing mount openings excluded from square inch area limit.
P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669otheraddedP2 Enterprises Sports Racer now permits 55mm flat plate intake restrictor Part # WM303013 as alternative to SIR.
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.
P2 Add ESR inlet restrictor #27869inductionaddedinductionP2 Enterprise Sports Racer 2.3L engine must use SIR or Flat Plate restrictor meeting peak horsepower, sized in whole or 0.5mm increments.
GTL Wing Mounting Upright Size #27641aeroaeroGTL wing mounting posts limited to 85 square inches exposed area each, measured flat from side view.
GTL Wing Mounting Upright Size #27641aeroaeroGTL wing mounting posts limited to 85 square inches each, measured flat from side view.
GTL GTL wing end plates addition #28243aerofasteraeroGTL wing endplates maximum area increased to 64 square inches from 8.5 by 3.0 inches rectangle.
GTL Clarification to letter #27406 #28309weight -50 lbsfasterweightGTL Mazda 12A street port minimum weight drops to 1950 lbs.
P2 Request for Fly by Wire Rule Wording Change #28247wordingwordingP2 electronic throttle control wording clarified: ETC permitted if stock ECU throttle pedal activates original throttle shaft mechanism.
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.
GTL Windshield Clips #27323otheraddedGT1, GT2, GT3, GTL, GTX may use bonded-glass factory windshields without clips or straps if attached per original specifications.
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.
GTL Request Factory Five Daytona coupe classification #26308cars addedaddedGTX Misc. adds Factory Five Type 65 Coupe R Ford 302/351 and 5.0/5.2L NA at 2600 lbs, plus Ferrari 458/488 Challenge, Ford FP350S, Chevrolet C6, Lamborghini Super Trofeo.
GTL Request to Classify the MK1 two door Jetta #27648cars addedaddedGTL adds Jetta Mk1 two-door classification effective 2020-01-01.
P2 Request for addition of BMW Engine in P2 Engine Table #27821engineaddedengineP2 adds BMW to permitted motorcycle-based engines alongside Kawasaki, Suzuki, Yamaha, Honda.
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.
GTL 88-91 Honda CRX Spec Line Correction #27233suspension & brakesremovedsuspension & brakesGTL Honda CRX 84-87 and 88-91 lose permission to use IRS with 2.5% weight penalty.
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.
1:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s
1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s
149.4Robert Iversen
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
+15.096squal +15.807s
113.7%qual 114.5%
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
+26.201squal +25.441s
123.8%qual 123.3%
2:06.997Peter Shadowen · fastest of 19 · top 5 within 4.0s
2:07.837Bill Ball · fastest of 18 · top 5 within 4.2s
131.1Peter Shadowen
+17.579squal +17.886s
115.9%qual 116.4%
55 rule changes (P2: 9, T3: 29, SM: 4, GTL: 13)14 cars added · 7 engine · 5 weight · 4 suspension & brakes · 2 induction · 2 tyres & wheels · 1 aero · 1 removed · 12 wording · 7 other · P2 Honda K20A-FD2 non-composite chassis intake restrictor note clarified; restrictor implementation date removed. · T3 Mazda NC MX-5 gains three alternate transmission gear ratio sets as options. · GTL Fun Cup Beetle engine weight set to 1850 lbs with Weber DMTL 32/34 induction. · P2 motorcycle engines: Stock restrictor to 35mm, Modified to 34mm; weights up to 1025 and 1125 lbs respectively. B.5 restrictor to 33mm, weight to 1185 lbs. · T2, T3, T4 spare tire and cover removal wording clarified; removable covers now explicitly allowable to remove. · GTL Fun Cup Beetle removes reference to VW engine table; Fun Cup engines only permitted. · 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. · GTL Honda CRZ 10-14, CRZ 15-16, and Insight 00-06 gain alternate wheelbase option of 90.6 inches. · P2 cars limited to power application on maximum two wheels. · T3 BMW E36 M3 96-00 now allows alternate sway bars, 35mm front, 27mm rear. · P2 Enterprise minimum weight increased to 1375 lbs.; peak horsepower of sealed ESR engine reduced per CRB specification. · 09-12 Porsche Cayman added to T3 with 2900 cc engine, 3150 lbs minimum weight, 18×9 wheels, 245 tyres. · GTL Fun Cup Beetle added, all model years, 2-door RWD, 94.5 in wheelbase, VW Fun Cup spec chassis. · GTX tube frame cars now allowed fuel injection with maximum 90mm throttle body. · GTX adds Ligier JS2 R classification with restrictor and minimum weight. · GTL Mazda 13B may use 25mm SIR with 175 lbs weight penalty added. · 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. · GT1 and GT2/3/Lite remove ride height ground clearance rules; cars may now touch ground when tires deflate. · T3 adds BMW E36 M3 96-00 BMWCCA I Sport, 3152cc, 3100 lbs, 18-inch wheels, 245 tyres. · GTL Mazda 12A may use 28mm SIR plus 175 lbs. · GTL: Ford Mustang 94-04 body newly classified for GTL racing. · P2 stock and modified engines get smaller restrictors (35.0mm, 34.0mm, 33.0mm) and heavier minimums (1025, 1125, 1185 lbs). · P2 Line A.1 restrictor reduced from 40mm to 38mm. · 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. · 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. · GTL Mini 1275–1399 Iron and Aluminum Crossflow with OE common sump gearbox reduce weight by 125 lbs, up from 50 lbs. · GTL BMC thru Rover Group removes four long inactive Mini engines: 948, 970, 1071, 1098. · GTX FIA GT3: Audi R8 now 40 mm restrictor and 2900 lbs; BMW Z4 now 70 mm restrictor and 2800 lbs; Ferrari 488 now 35 mm restrictor, TIR, and 3025 lbs. · P2 Spec Line cars now allow 1345cc Hayabusa stock engines at 1050 lb minimum with 30mm restrictor. · P2 Group CN Honda K20A-FD2 55mm intake restrictor implementation delayed from 1 January to 3 March 2019. · P2 Honda K20A-FD2 Group CN must use stock intake manifold, 64mm throttle, 55mm restrictor at 1500 lbs minimum. · 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
P2 Update Engine Table Line E notes #27414wordingwordingP2 Honda K20A-FD2 non-composite chassis intake restrictor note clarified; restrictor implementation date removed.
T3 Request Mazda NC MX-5 alternate transmission gear ratios #27155otheraddedT3 Mazda NC MX-5 gains three alternate transmission gear ratio sets as options.
GTL Fun Cup Beetle #27334wordingwordingGTL Fun Cup Beetle engine weight set to 1850 lbs with Weber DMTL 32/34 induction.
P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engineslowerengineP2 motorcycle engines: Stock restrictor to 35mm, Modified to 34mm; weights up to 1025 and 1125 lbs respectively. B.5 restrictor to 33mm, weight to 1185 lbs.
T3 Request spare tire/wheel clarification #27012wordingfasterT2, T3, T4 spare tire and cover removal wording clarified; removable covers now explicitly allowable to remove.
GTL GTL #26960wordingwordingGTL Fun Cup Beetle removes reference to VW engine table; Fun Cup engines only permitted.
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.
GTL Request CRZ wheelbase change #26896cars addedaddedGTL Honda CRZ 10-14, CRZ 15-16, and Insight 00-06 gain alternate wheelbase option of 90.6 inches.
P2 E&O Transmissions #27006engineslowerengineP2 cars limited to power application on maximum two wheels.
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.
P2 Request to restrict all cars #26246weightslowerweightP2 Enterprise minimum weight increased to 1375 lbs.; peak horsepower of sealed ESR engine reduced per CRB specification.
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.
GTL Request to Classify VW Fun Cup Beetle #25986cars addedaddedGTL Fun Cup Beetle added, all model years, 2-door RWD, 94.5 in wheelbase, VW Fun Cup spec chassis.
GTL Request GTX Fuel injection for previous GT-1 tube frame cars #26141engineaddedengineGTX tube frame cars now allowed fuel injection with maximum 90mm throttle body.
GTL Request to Classify Ligier JS2 R #26535cars addedaddedGTX adds Ligier JS2 R classification with restrictor and minimum weight.
GTL Request for GTL Mazda 13B SIR Increase with Penalty #26572engineaddedengineGTL Mazda 13B may use 25mm SIR with 175 lbs weight penalty added.
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.
GTL Request Ride Height Clarification #26600wordingfasterGT1 and GT2/3/Lite remove ride height ground clearance rules; cars may now touch ground when tires deflate.
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.
GTL Request Mazda 12a Rotary SIR Increase #26081inductionaddedinductionGTL Mazda 12A may use 28mm SIR plus 175 lbs.
GTL Request to Classify Mustang 2 Body in GTL #26222cars addedaddedGTL: Ford Mustang 94-04 body newly classified for GTL racing.
P2 Change Engine Table Lines B.1 & B.5 #25777inductionslowerinductionP2 stock and modified engines get smaller restrictors (35.0mm, 34.0mm, 33.0mm) and heavier minimums (1025, 1125, 1185 lbs).
P2 Change Line A.1 restrictor size #26429engineslowerengineP2 Line A.1 restrictor reduced from 40mm to 38mm.
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.
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.
GTL Request for GTL Mini Adjustments #25754weightfasterweightGTL Mini 1275–1399 Iron and Aluminum Crossflow with OE common sump gearbox reduce weight by 125 lbs, up from 50 lbs.
GTL BMC thru Rover Group remove long inactive mini #25771removedremovedGTL BMC thru Rover Group removes four long inactive Mini engines: 948, 970, 1071, 1098.
GTL GTX Homologation table update #26034otherunclearGTX FIA GT3: Audi R8 now 40 mm restrictor and 2900 lbs; BMW Z4 now 70 mm restrictor and 2800 lbs; Ferrari 488 now 35 mm restrictor, TIR, and 3025 lbs.
P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595cars addedaddedP2 Spec Line cars now allow 1345cc Hayabusa stock engines at 1050 lb minimum with 30mm restrictor.
P2 Change CN inlet restrictor implementation date #25816wordingwordingP2 Group CN Honda K20A-FD2 55mm intake restrictor implementation delayed from 1 January to 3 March 2019.
P2 Clarify Honda K20A-FD2 parts requirement #25950engineslowerengineP2 Honda K20A-FD2 Group CN must use stock intake manifold, 64mm throttle, 55mm restrictor at 1500 lbs minimum.
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 P2'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.