Lap times across years say as much about the weather as the class. % of GT2 is each class's best lap as a share of GT2'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.
Quickest here:GT2 1:25.405 Andrew Aquilante, Runoffs 2016 qualifying · FM 1:26.043 Jacob Loomis, Runoffs 2016 qualifying · B-Spec 1:46.865 David Daughtery, Runoffs 2016 qualifying · SM 1:40.514 Justin Hille, Runoffs 2016 qualifying
GT2FMB-SpecSMsolid race · dashed qualifying · slower is lower
GT2FMB-SpecSMsolid race · dashed qualifying · each class's best lap as a share of GT2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
2:09.634John Atwell · fastest of 18 · top 5 within 4.3s-2.173s (-1.65%)
2:10.650John Atwell · fastest of 18 · top 5 within 4.1s-2.797s (-2.10%)
163.0Jack Stanford-0.3 mph (-0.2%)
2:51.987Josh Schmidt · fastest of 23 · top 5 within 1.3s-0.224s (-0.13%)
2:51.633Josh Schmidt · fastest of 22 · top 5 within 1.7s-1.980s (-1.14%)
112.5Ricky Holmstrom-0.2 mph (-0.1%)
+40.983squal +42.353s
131.4%qual 132.7%
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%)
+32.075squal +32.539s
124.6%qual 125.1%
31 rule changes (GT2: 13, B-Spec: 16, SM: 2)9 cars added · 3 suspension & brakes · 3 weight · 2 aero · 1 induction · 6 wording · 7 other · SM/SMX Mazda rear toe link part number revised from 0000-04-5361426 to 0000-04-5361. · B-Spec Mazda2 10-14 ECU housing may be trimmed and relocated within the engine bay. · B-Spec and C-Spec Hyundai Accent and Kia Rio models now permit Wilwood 260-10500 reservoir kit. · B-Spec Mini Cooper R56, R56LCI, R55 Clubman, R58 Coupe minimum weights reduced to 2600 lbs with OEM catalyst or 2675 lbs with header. · GT2 Panoz Esperante GTS spec simplified to standard GT2 rules unless noted; detailed suspension, brake, aero specs removed. · TA2 shock absorbers rise to $1005, rear calipers to $585, brake pads to $330 per axle; wheels drop to $165. · GT2 Porsche 991.1 GT3 Cup now permits modifications from Grand Am, IMSA Cup, World Challenge rules; factory Lexan windows and ABS allowed. · GT2-ST Corvette C7 L76 minimum weight drops 100 lbs to 3000, restrictor rises to 83 mm FPR. · GT2 Porsche 997.2 GT3 Cup removes permission for Lexan front windows and clarifies ABS allowance status. · SM/SMX part number 0000-10-6900 replaced with 0000-06-5016-KT in GCR 9.1.7.C.1.j.1.c. · B-Spec Mini Cooper R50 MT gains Getrag GS5BG transmission option with ratios 3.308, 1.913, 1.258, 0.943, 0.806 and 4.352 final drive. · B-Spec exhaust rules clarified: primary catalyst required unless spec permits removal, downstream system free if routing and exit location match OEM. · B-Spec Mini Cooper R56 and R56LCI allowed World Challenge suspension kit. · B-Spec adds approved Walker replacement catalyst part numbers for eight car models. · B-Spec Nissan Versa Sedan/Hatchback 2012–2019 and Toyota Yaris Hatchback/Sedan 2007–2018 may remove primary catalyst. · Ginetta G56 GT4 (V8) added to GT2 with GM LS V8, 6.2L, 72mm restrictor, 3300 lbs. · GT3U class removed from GCR; GT3U cars now compete in STU. · GT2 Audi R8 GT4 removes requirement to carry GT4 rules at events, directs to GT2-ST header note. · C-Spec adds approved rear sway bars for Chevrolet Cruze, Dodge Dart, Ford Focus, Honda Civic, Mazda3i, Mazda 3i, Toyota Corolla models. · GT2 Porsche 911 SC gains 4.0L air-cooled engine option at 2275 or 2350 lbs depending on valve count. · M3 E92 classified in GT2 with 3999cc V8, 35mm restrictor, 3300 lb minimum weight. · B-Spec Chevrolet Sonic and Ford Fiesta and Honda Fit Notes sections reorganised for clarity; approved parts listed; no performance changes. · B-Spec: Sonic restrictors removed, Fit MT up 25 lbs to 2550, Fit CVT restrictor removed, Mini Coopers up 2 mm restrictor, Versa sedans down 25 lbs to 2425, Versa 2020+ and IA restrictors removed. · B-Spec Mazda2 10-14 exhaust header cat delete: only Mazda Motorsports PN 0000-06-2410 allowed, no weight adder. · GT2 adds Cadillac CTS, Chevrolet Impala/Malibu/Monte Carlo/SS, Dodge Intrepid, Ford Fusion/Taurus, Lincoln MKS, Pontiac G8/GTO/Grand Prix, Toyota Camry, and Gen late Model Stock Car bodies Camaro/Mustang/Camry. · GT2 Mazda BP 1839cc DOHC classified with 2250 lbs minimum weight, 46mm restrictor, EFR6258 or EFR7163 turbo allowed. · B-Spec Honda Fit MT 07-08 now permits Torque Solution Shifter Cable Bushing kit TS-SCB-506. · B-Spec Ford Fiesta Hatchback gains 55 lbs to 2525, restrictor opens 39 to 40 mm FPR; Sedan gains 55 lbs to 2525, restrictor opens 38 to 39 mm FPR. · B-Spec Hyundai Accent Sedan and Kia Rio Sedan remove approved Bilstein B8 shock 33-187112 from rear suspension. · B-Spec Honda Fit MT 07-08 gains Bilstein B14 kit 47172401, Progress rear sway bar #62.1060, Injen intake SP1511, Torque Solution shifter cable bushing TS-SCB-506; Runoffs eligibility restriction removed.showhide
SM Rear Toe Link #40271wordingwordingSM/SMX Mazda rear toe link part number revised from 0000-04-5361426 to 0000-04-5361.
B-Spec ECU Location in Mazda2 #40034otheraddedB-Spec Mazda2 10-14 ECU housing may be trimmed and relocated within the engine bay.
B-Spec Allow Cars With Combined Brake/Clutch Reservoir to Separate. #40122otheraddedB-Spec and C-Spec Hyundai Accent and Kia Rio models now permit Wilwood 260-10500 reservoir kit.
B-Spec Race Memo RM 26-01 B-Spec Mini Cooper Weight Adjustments with OEM #40070weightfaster · weightB-Spec Mini Cooper R56, R56LCI, R55 Clubman, R58 Coupe minimum weights reduced to 2600 lbs with OEM catalyst or 2675 lbs with header.
GT2 Panoz Esperante GTS Letter ID Number: #38494 - Additional Info #38584wordingunclearGT2 Panoz Esperante GTS spec simplified to standard GT2 rules unless noted; detailed suspension, brake, aero specs removed.
GT2 Appendix L Update #39923otherotherTA2 shock absorbers rise to $1005, rear calipers to $585, brake pads to $330 per axle; wheels drop to $165.
GT2 GT2 Porsche 997.2 GT3 Cup EDIT #40125otheraddedGT2 Porsche 991.1 GT3 Cup now permits modifications from Grand Am, IMSA Cup, World Challenge rules; factory Lexan windows and ABS allowed.
GT2 Corvette C7 (14-19) L76 Specline Errors/Missing Changes #39838weight -100 lbsfaster · weightGT2-ST Corvette C7 L76 minimum weight drops 100 lbs to 3000, restrictor rises to 83 mm FPR.
GT2 GT2 Porsche 997.2 GT3 Cup #39936wordingwordingGT2 Porsche 997.2 GT3 Cup removes permission for Lexan front windows and clarifies ABS allowance status.
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.
B-Spec Add Getrag GS5BG Transmisson Ratios for Mini R50 #39416cars addedaddedB-Spec Mini Cooper R50 MT gains Getrag GS5BG transmission option with ratios 3.308, 1.913, 1.258, 0.943, 0.806 and 4.352 final drive.
B-Spec Exhaust Rules Update #39669wordingwordingB-Spec exhaust rules clarified: primary catalyst required unless spec permits removal, downstream system free if routing and exit location match OEM.
B-Spec Please reinstate KW suspension for R56 #39727suspension & brakesadded · suspension & brakesB-Spec Mini Cooper R56 and R56LCI allowed World Challenge suspension kit.
B-Spec Add approved replacement catalysts #39817otheraddedB-Spec adds approved Walker replacement catalyst part numbers for eight car models.
B-Spec Yaris/Versa catalyst removal #39818aerofaster · aeroB-Spec Nissan Versa Sedan/Hatchback 2012–2019 and Toyota Yaris Hatchback/Sedan 2007–2018 may remove primary catalyst.
GT2 Classification Request - Ginetta G56 GT4 (V8) #39625cars addedaddedGinetta G56 GT4 (V8) added to GT2 with GM LS V8, 6.2L, 72mm restrictor, 3300 lbs.
GT2 Remove GT3U from GCR as it is now in STU #39862cars addedremoved · cars addedGT3U class removed from GCR; GT3U cars now compete in STU.
GT2 Audi R8 GT4 remove spec line notes #39864wordingwordingGT2 Audi R8 GT4 removes requirement to carry GT4 rules at events, directs to GT2-ST header note.
B-Spec C-Spec Rear Sway Bars #39652suspension & brakesadded · suspension & brakesC-Spec adds approved rear sway bars for Chevrolet Cruze, Dodge Dart, Ford Focus, Honda Civic, Mazda3i, Mazda 3i, Toyota Corolla models.
GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2 #39249cars addedaddedGT2 Porsche 911 SC gains 4.0L air-cooled engine option at 2275 or 2350 lbs depending on valve count.
GT2 Classify T1 BMW in GT2 #39408cars addedaddedM3 E92 classified in GT2 with 3999cc V8, 35mm restrictor, 3300 lb minimum weight.
B-Spec Notes section cleanup #39062wordingwordingB-Spec Chevrolet Sonic and Ford Fiesta and Honda Fit Notes sections reorganised for clarity; approved parts listed; no performance changes.
B-Spec 2026 BOP Recommendations #39475induction +25 lbsunclearB-Spec: Sonic restrictors removed, Fit MT up 25 lbs to 2550, Fit CVT restrictor removed, Mini Coopers up 2 mm restrictor, Versa sedans down 25 lbs to 2425, Versa 2020+ and IA restrictors removed.
GT2 Additional Body Options to Replace Older Stock Car Bodies #39086cars addedaddedGT2 adds Cadillac CTS, Chevrolet Impala/Malibu/Monte Carlo/SS, Dodge Intrepid, Ford Fusion/Taurus, Lincoln MKS, Pontiac G8/GTO/Grand Prix, Toyota Camry, and Gen late Model Stock Car bodies Camaro/Mustang/Camry.
GT2 GT3 Turbo to GT2? #39365cars addedaddedGT2 Mazda BP 1839cc DOHC classified with 2250 lbs minimum weight, 46mm restrictor, EFR6258 or EFR7163 turbo allowed.
GT2 Tech Bulletins for GT2 and GT2-ST #39537cars added -100 lbs
B-Spec Alternate Shift Cable Bushings and Rear Spring Seats #38472otheraddedB-Spec Honda Fit MT 07-08 now permits Torque Solution Shifter Cable Bushing kit TS-SCB-506.
B-Spec Fiesta BOP Adjustment #38847weight +55 lbsfaster · weightB-Spec Ford Fiesta Hatchback gains 55 lbs to 2525, restrictor opens 39 to 40 mm FPR; Sedan gains 55 lbs to 2525, restrictor opens 38 to 39 mm FPR.
B-Spec Request to Remove Rear Shock From Spec Line Hyundai Accents/Kia #39017suspension & brakesremoved · suspension & brakesB-Spec Hyundai Accent Sedan and Kia Rio Sedan remove approved Bilstein B8 shock 33-187112 from rear suspension.
2:11.807Brad McAllister · fastest of 16 · top 5 within 3.4s-0.053s (-0.04%)
2:13.447John Atwell · fastest of 13 · top 5 within 3.6s+0.136s (+0.10%)
163.3Charlie Peter-1.0 mph (-0.6%)
2:52.211Josh Schmidt · fastest of 19 · top 5 within 0.8s+0.184s (+0.11%)
2:53.613Daniel Conway · fastest of 18 · top 5 within 0.4s+1.724s (+1.00%)
112.7Stewart Black-0.4 mph (-0.3%)
+40.166squal +40.404s
130.1%qual 130.7%
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%)
+30.983squal +31.304s
123.2%qual 123.7%
34 rule changes (GT2: 7, B-Spec: 23, SM: 4)5 suspension & brakes · 3 cars added · 2 aero · 2 induction · 2 weight · 1 engine · 1 removed · 12 wording · 6 other · B-Spec and C-Spec remove asterisk from Rule 9.1.10.D.9 public road use note. · B-Spec Honda Fit MT 09-14 may disable two pedal shutdown by cutting or de-pinning pin 42 BKSW at main ECU connector. · B-Spec Honda Fit MT 07-08 restricted to Injen Intake SP1511, cold air intakes no longer allowed; requires three Super Tour weekends and OBDII data collection. · GT2 Porsche 911, 963, 994 may use 993 3.8 RSR rear deck lid or faithful aftermarket reproductions. · B-Spec adds Hyundai Accent Sedan (12-17) and Kia Rio Sedan (12-17), both 1591cc, 2525 lbs, 40mm FPR restrictor. · B-Spec Honda Fit MT 09-14 adds allowed Acuity Shifter Base Bushing Kit 1954. · B-Spec Honda Fit AT 09-14 adds Weapon R Intake 301-166-301 as permitted option. · B-Spec and C-Spec shift linkages may now use approved aftermarket bushings; cables and linkage remain stock otherwise. · 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. · B-Spec Hyundai Accent Hatchback corrected to 12-17, Kia Rio Hatchback to 12-15. · B-Spec 07-08 Honda Fit MT minimum weight increases 50 lbs to 2450. · B-Spec Honda Fit 07-08 MT and AT now allow Bilstein B14 kit 47172401. · 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. · B-Spec: Honda Fit cold air intake restricted to three named parts with 25lb adder; Mazda2 exhaust headers allowed with weight adders; Mini Cooper FPR adjusted across six variants; Nissan Versa minimum weight cut 40lb with Injen intake allo… · B-Spec Accent and Yaris get brake-type weight adjustments: drum subtract 25 lb, disc add 25 lb. · B-Spec Hyundai Accent and Kia Rio (12-19) now allow Bilstein B14 kit #47167490 front shocks and BabyFace Fabrication sump extension #BF-HYU-PAN. · B-Spec Toyota Yaris Hatchback 12-18 rear brakes now allow 10.2 inch disc option alongside 7.9 drum. · B-Spec Toyota Yaris Hatchback and Sedan may now disconnect speed sensor. · B-Spec Fiat 500 (12-17) spec line expires 1/1/26 unless appeal filed. · GT2 Pontiac Fiero drivetrain changed to RWD and hood bulge permitted for front engine relocation. · TA2 OEM wing height rule exemption removed; STO permits factory aero but bans it with aftermarket wings. · B-Spec and C-Spec remove redundant notes language from Honda Fit AT, Honda Fit CVT, Mazda2, Mini Cooper Hatchback MT and CVT, and Toyota Yaris Hatchback. · B-Spec removes Mini Cooper Countryman R60, Cooper Paceman R61, and Nissan Versa 07-11 and 09-11 spec lines. · B-Spec Nissan Micra Cup Car spec line expires 7/1/25 unless appeal submitted by 6/30/25. · GT2 STO aftermarket ABS weight penalty reduced from 100 lbs to 50 lbs. · B-Spec and C-Spec replace wheelbase spec with restrictor (mm) effective 2025-01-01; Sonic 33–36, Fiesta 38–39, Fit 31–33, Accent/Rio 41, Mini Cooper 40–46, Nissan Versa 38, Toyota IA/Yaris 38–42. · B-Spec Hyundai Accent and Kia Rio approved for Bilstein B8 shock 33-187112 in rear suspension. · GT2 Panoz Esperante GTS adds 2013-2016 Ford EcoBoost Twin Turbo V-6, 3496 cc, 2600 lbs, twin turbo induction. · TA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof height limit. · GT2 Sunbeam Tiger gains Holly 650 cfm carburetors PN #80541-1 and PN #80541-2 as alternate options. · 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. · B-Spec Toyota Scion IA Sedan 16-20 allows ST Suspension Kit 13275022; requires three Super Tour weekends and OBDII data collection before Runoffs eligibility. · Honda Fit AT 07-08 B-Spec notes simplified: specific damper, spring, and helper spring part numbers removed; Progress rear sway bar 62.1060 and any cold air intake now allowed.showhide
B-Spec Remove Asterisk from Rule 9 #38768wordingwordingB-Spec and C-Spec remove asterisk from Rule 9.1.10.D.9 public road use note.
B-Spec Disabling 2 Pedal Shutdown #38354otheraddedB-Spec Honda Fit MT 09-14 may disable two pedal shutdown by cutting or de-pinning pin 42 BKSW at main ECU connector.
B-Spec Update Honda Fit MT (07-08) Intake Allowance #38530wordingwordingB-Spec Honda Fit MT 07-08 restricted to Injen Intake SP1511, cold air intakes no longer allowed; requires three Super Tour weekends and OBDII data collection.
GT2 Rear Deck Lid for Older Air-Cooled Porsche #38506aeroadded · aeroGT2 Porsche 911, 963, 994 may use 993 3.8 RSR rear deck lid or faithful aftermarket reproductions.
B-Spec Add Sedan spec lines for Hyundai & Kia #37537cars addedaddedB-Spec adds Hyundai Accent Sedan (12-17) and Kia Rio Sedan (12-17), both 1591cc, 2525 lbs, 40mm FPR restrictor.
B-Spec Shifter Bushing Questions. #38048otheraddedB-Spec Honda Fit MT 09-14 adds allowed Acuity Shifter Base Bushing Kit 1954.
B-Spec Add Weapon R Intake to Honda Fit MT (09-14) Spec Line #38306inductionadded · inductionB-Spec Honda Fit AT 09-14 adds Weapon R Intake 301-166-301 as permitted option.
B-Spec Update Rule 46 #38307wordingwordingB-Spec and C-Spec shift linkages may now use approved aftermarket bushings; cables and linkage remain stock otherwise.
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.
B-Spec Correct Hyundai/Kia Model Years #37943wordingwordingB-Spec Hyundai Accent Hatchback corrected to 12-17, Kia Rio Hatchback to 12-15.
B-Spec 07-08 Honda Fit MT Requests #37974weight +50 lbsslower · weightB-Spec 07-08 Honda Fit MT minimum weight increases 50 lbs to 2450.
B-Spec Add B14 Kit Part # to Honda Fit (07-08) Spec line #38010suspension & brakesadded · suspension & brakesB-Spec Honda Fit 07-08 MT and AT now allow Bilstein B14 kit 47172401.
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.
B-Spec 2025 BOP Recommendations #37520otherotherB-Spec: Honda Fit cold air intake restricted to three named parts with 25lb adder; Mazda2 exhaust headers allowed with weight adders; Mini Cooper FPR adjusted across six variants; Nissan Versa minimum weight cut 40lb with Injen intake allo…
B-Spec Request to Update the Spec line for Hyundai Accent and Kia Rio #37880otheraddedB-Spec Hyundai Accent and Kia Rio (12-19) now allow Bilstein B14 kit #47167490 front shocks and BabyFace Fabrication sump extension #BF-HYU-PAN.
B-Spec Toyota Yaris Hatchback (12-18) rear disc brakes #37530suspension & brakessuspension & brakesB-Spec Toyota Yaris Hatchback 12-18 rear brakes now allow 10.2 inch disc option alongside 7.9 drum.
B-Spec Yaris Speed Sensor #37536otheraddedB-Spec Toyota Yaris Hatchback and Sedan may now disconnect speed sensor.
B-Spec Set Expiration Date For Fiat 500 #37689cars addedremoved · cars addedB-Spec Fiat 500 (12-17) spec line expires 1/1/26 unless appeal filed.
GT2 Hood Bulge allowed #37000wordingwordingGT2 Pontiac Fiero drivetrain changed to RWD and hood bulge permitted for front engine relocation.
GT2 OEM Wing Adjustment #37590aeroaeroTA2 OEM wing height rule exemption removed; STO permits factory aero but bans it with aftermarket wings.
B-Spec Remove Redundant Language from Notes Sections #37337wordingwordingB-Spec and C-Spec remove redundant notes language from Honda Fit AT, Honda Fit CVT, Mazda2, Mini Cooper Hatchback MT and CVT, and Toyota Yaris Hatchback.
B-Spec Expire designated spec lines #37517removedremovedB-Spec removes Mini Cooper Countryman R60, Cooper Paceman R61, and Nissan Versa 07-11 and 09-11 spec lines.
B-Spec Set expiration date for Nissan Micra Cup Cars (Canadian) #37519wordingremovedB-Spec Nissan Micra Cup Car spec line expires 7/1/25 unless appeal submitted by 6/30/25.
GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty #36538weightfaster · weightGT2 STO aftermarket ABS weight penalty reduced from 100 lbs to 50 lbs.
B-Spec Remove wheelbase from spec lines and replace with Restrictor #36074enginefaster · engineB-Spec and C-Spec replace wheelbase spec with restrictor (mm) effective 2025-01-01; Sonic 33–36, Fiesta 38–39, Fit 31–33, Accent/Rio 41, Mini Cooper 40–46, Nissan Versa 38, Toyota IA/Yaris 38–42.
B-Spec Bilstein Rear Shock Request for Hyundai Accent/Kia Rio #36965suspension & brakesadded · suspension & brakesB-Spec Hyundai Accent and Kia Rio approved for Bilstein B8 shock 33-187112 in rear suspension.
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.
B-Spec Scion IA/Toyota Yaris/Mazda 2 DY chassis suspension #35780suspension & brakesadded · suspension & brakesB-Spec Toyota Scion IA Sedan 16-20 allows ST Suspension Kit 13275022; requires three Super Tour weekends and OBDII data collection before Runoffs eligibility.
B-Spec Clean up 07-08 Honda Fit AT Notes Section #36542wordingwordingHonda Fit AT 07-08 B-Spec notes simplified: specific damper, spring, and helper spring part numbers removed; Progress rear sway bar 62.1060 and any cold air intake now allowed.
2:11.860Charlie Peter · fastest of 23 · top 5 within 1.1s-0.438s (-0.33%)
2:13.311John Atwell · fastest of 23 · top 5 within 0.9s-0.968s (-0.72%)
164.3Jonathan Start+2.1 mph (+1.3%)
2:52.027Daniel Conway · fastest of 25 · top 5 within 0.7s-0.006s (-0.00%)
2:51.889Rob Piekarczyk · fastest of 25 · top 5 within 0.6s-0.958s (-0.55%)
113.1Joe McClughan+1.5 mph (+1.4%)
+38.578squal +40.167s
128.9%qual 130.5%
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%)
+28.175squal +29.246s
121.1%qual 122.2%
47 rule changes (GT2: 13, B-Spec: 30, SM: 4)7 weight · 6 cars added · 5 engine · 4 suspension & brakes · 4 tyres & wheels · 2 induction · 1 aero · 1 removed · 13 wording · 4 other · 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. · B-Spec restricted to Goodyear Eagle RS dry and RS-R wet P205/50R15 tires; C-Spec 225/45R17 tire mixing prohibition clarified. · B-Spec automatics: Sonic restrictors to 35/36mm, Fit weights to 2350/2500 lbs, Fit CVT restrictor to 313mm, Mini weights to 2500 lbs, Mini restrictors to 35-46mm. · B-Spec and C-Spec hood pins now recommended but not required; factory release cable may be removed if pins used. · B-Spec Chevrolet Sonic and C-Spec Cruze allowed Babyface Fabrication brake caliper pistons SNC-SS and CRZ-SS. · B-Spec Honda Fit MT & CVT (15-19) notes cleaned up: removed obsolete parts, added rear sway bar Progress 62.1063 and CVT transmission cooler Setrab 50-119-7612. · B-Spec Nissan Versa 09-11 spec line expires 1 January 2025 unless appeal filed by 1 December 2024. · B-Spec removes redundant Rule 25 from GCR Section 9.1.10.E, effective 2024-07-01. · B-Spec Hyundai Accent rear brakes change to 10.3 disc; Kia Rio rear brakes change to 10.3 disc. · GT2-ST: aftermarket replacement differential housings permitted if exact equivalent. · GT4 cars now permitted in GT2-ST with factory power stick or Pro Series restrictor, 100-pound weight penalty for slicks. · Chevrolet Sonic Spec lines add Bilstein B14 kit #47-171725 as verified compatible suspension option. · B-Spec and C-Spec: redundant sway bar end link part numbers removed from Mazda2 and eleven Mini Cooper variants' notes. · B-Spec Fiat 500 spec line year range changed from 12-15 to 12-17. · B-Spec Honda Fit CVT 15-19 minimum weight increases to 2550 lbs, intake restrictor to 31 mm. · B-Spec model descriptions standardized: trim levels removed, body styles clarified with consistent wording across Sonic, Fiesta, Fit, Accent, Rio, Versa, and Yaris. · B-Spec and C-Spec wheel rules clarified: tyre tread may not protrude beyond fender opening; wheel spacers allowed equally on all four corners; total offset must match left to right per axle. · GT2-ST Acura NSX minimum weight rises to 3000 lbs, restrictor increases to 45mm TIR. · GT2-ST Spec Corvette (14-19) LS2 restrictor increases from 78mm to 80mm flat plate. · B-Spec Honda Fit MT 15-19 restrictor increases 30mm to 31mm, minimum weight rises 2525 to 2550 lbs. · B-Spec and C-Spec gain wheel offset freedom and spacer flexibility; C-Spec wheels now differ per axle, not all four corners. · B-Spec Mini Cooper Countryman R60, Paceman R61, and Nissan Versa 07-11 1797cc expire 1/1/2025 without appeal by 12/1/2024. · B-Spec 07-08 Honda Fit Automatic allows rear sway bar Progress #62.1060; manual adds same part. · Chevrolet Corvette C8 (2020–) classified in GT2-ST: 6162 cc, 3300 lbs minimum, 71 mm restrictor, flat plate. · Mitjet ST 2015 added to GT2, must run per VTS specs with FIA form CdM008. · B-Spec and C-Spec auxiliary transmission cooler approval rule deleted. · B-Spec Chevrolet Sonic 5dr Hatch MT 12-19 allows aluminum radiator #ZZP-ZZ013. · 09-14 Honda Fit MT and AT now have separate spec lines with distinct gear ratios and final drive. · B-Spec Mazda2 10-14 minimum weight increases 70 lbs to 2350, headers and parts equalized effective 3-1-2024. · B-Spec Nissan Versa and Versa Note 2013–2019 permitted Hardrace HR-Q0146 19mm rear sway bar. · 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 Chevrolet Corvette 7011 OEM 7-liter minimum weight reduces to 3125 lbs, down 150 lbs. · GT2 Nissan and GT3 Mazda, Mitsubishi 4G93, Nissan QR25DE/DD, QE25DE/DD now permit Direct Injection per 9.1.2.F.7.5.E. · B-Spec Hankook tires allowed at regionals only through June 30, 2024; Goodyear becomes sole legal tire July 1, 2024. · B-Spec Nissan Versa Note Hatchback minimum weight drops 60 lbs to 2490; sedan line expanded to 2012–2019; 2013+ model deleted. · B-Spec and C-Spec clarify ECU must be unaltered OE, no altering devices allowed in grid to post-impound, and data acquisition systems expanded with new sensor types permitted. · GT2 Dodge Viper Gen 3 hybrid kit restrictor reduced from 50mm to 45mm flat plates in 8300 class. · C-Spec Mazda 3i 2010-2013 5-speed manual third gear ratio changes from 3.84 to 1.84. · C-Spec Dodge Dart 14-16 displacement corrected to 1998 cc, bore and stroke to 88.0 x 82.0 mm. · 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. · B-Spec adds Goodyear Eagle RS dry and wet tires; Hankook restricted to regional events from 2024. · GT2-ST Dodge Viper including Comp Coupe, ACR/ACR-X adds VRL front fascia, 100 lbs weight reduction.showhide
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 #36556engineadded · engineSM 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.
B-Spec BOP help for the automatic B-Specs #36161induction -50 lbsfaster · inductionB-Spec automatics: Sonic restrictors to 35/36mm, Fit weights to 2350/2500 lbs, Fit CVT restrictor to 313mm, Mini weights to 2500 lbs, Mini restrictors to 35-46mm.
B-Spec Require hood pins #36233wordingwordingB-Spec and C-Spec hood pins now recommended but not required; factory release cable may be removed if pins used.
B-Spec Sonic Caliper Pistons #36238tyres & wheelsadded · tyres & wheelsB-Spec Chevrolet Sonic and C-Spec Cruze allowed Babyface Fabrication brake caliper pistons SNC-SS and CRZ-SS.
B-Spec Clean up (15-19) Honda Fit MT & CVT Notes Sections #36068wordingwordingB-Spec Honda Fit MT & CVT (15-19) notes cleaned up: removed obsolete parts, added rear sway bar Progress 62.1063 and CVT transmission cooler Setrab 50-119-7612.
B-Spec Set expiration date for Nissan Versa (09-11) #36069cars addedremoved · cars addedB-Spec Nissan Versa 09-11 spec line expires 1 January 2025 unless appeal filed by 1 December 2024.
B-Spec Correct error for rear brakes of Hyundai/Kia #36174suspension & brakessuspension & brakesB-Spec Hyundai Accent rear brakes change to 10.3 disc; Kia Rio rear brakes change to 10.3 disc.
GT2 GT4 cars may run in GT2-ST #36235cars addedaddedGT4 cars now permitted in GT2-ST with factory power stick or Pro Series restrictor, 100-pound weight penalty for slicks.
B-Spec Add B14 Kit Part # to Sonic Spec line In #35969suspension & brakesadded · suspension & brakesChevrolet Sonic Spec lines add Bilstein B14 kit #47-171725 as verified compatible suspension option.
B-Spec Eliminate redundant sway bar end link part #s from notes In #35970wordingwordingB-Spec and C-Spec: redundant sway bar end link part numbers removed from Mazda2 and eleven Mini Cooper variants' notes.
B-Spec Update Fiat 500 Spec line In #35990cars addedaddedB-Spec Fiat 500 spec line year range changed from 12-15 to 12-17.
B-Spec Update (15-19) Honda Fit #36067weight +25 lbsslower · weightB-Spec Honda Fit CVT 15-19 minimum weight increases to 2550 lbs, intake restrictor to 31 mm.
B-Spec Delete trim levels/update language for spec lines #35746wordingwordingB-Spec model descriptions standardized: trim levels removed, body styles clarified with consistent wording across Sonic, Fiesta, Fit, Accent, Rio, Versa, and Yaris.
B-Spec Wheel Rules #36066wordingwordingB-Spec and C-Spec wheel rules clarified: tyre tread may not protrude beyond fender opening; wheel spacers allowed equally on all four corners; total offset must match left to right per axle.
GT2 Request for Spec Line 1010 Reconsideration #35009weight +300 lbsslower · weightGT2-ST Acura NSX minimum weight rises to 3000 lbs, restrictor increases to 45mm TIR.
GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2 #35878enginefaster · engineGT2-ST Spec Corvette (14-19) LS2 restrictor increases from 78mm to 80mm flat plate.
B-Spec Change restrictor from 30mm to 31mm (2015+ Honda Fit) and add 50# #34857inductionfaster · inductionB-Spec Honda Fit MT 15-19 restrictor increases 30mm to 31mm, minimum weight rises 2525 to 2550 lbs.
B-Spec Wheel Offset and Spacer Revision #35466suspension & brakessuspension & brakesB-Spec and C-Spec gain wheel offset freedom and spacer flexibility; C-Spec wheels now differ per axle, not all four corners.
B-Spec Set Expiration Date for Unused Spec Lines #35742wordingwordingB-Spec Mini Cooper Countryman R60, Paceman R61, and Nissan Versa 07-11 1797cc expire 1/1/2025 without appeal by 12/1/2024.
B-Spec BOP Adjustment for Yaris iA, 2020+ Versa, and 07-08 Honda Fit #35382weight -125 lbs
B-Spec 07-08 Honda Fit Rear Sway Bar part # #35473otherotherB-Spec 07-08 Honda Fit Automatic allows rear sway bar Progress #62.1060; manual adds same part.
GT2 Classify Corvette C8 (2020- ) into GT2/ST #33759cars addedaddedChevrolet Corvette C8 (2020–) classified in GT2-ST: 6162 cc, 3300 lbs minimum, 71 mm restrictor, flat plate.
GT2 Requesting classification for a 2015 Mitjet ST in GT2 #35408cars addedaddedMitjet ST 2015 added to GT2, must run per VTS specs with FIA form CdM008.
B-Spec Eliminate Redundant Trans Cooler Rule #35353removedremovedB-Spec and C-Spec auxiliary transmission cooler approval rule deleted.
B-Spec Fix Sonic Hatchback MT Spec Line #35371otheraddedB-Spec Chevrolet Sonic 5dr Hatch MT 12-19 allows aluminum radiator #ZZP-ZZ013.
B-Spec Split Spec Line of Automatic and Manual 2nd Gen (09-14) Fit #35251cars addedadded09-14 Honda Fit MT and AT now have separate spec lines with distinct gear ratios and final drive.
B-Spec Equalize Mazda 2 Headers and clean up spec line #35259weightslower · weightB-Spec Mazda2 10-14 minimum weight increases 70 lbs to 2350, headers and parts equalized effective 3-1-2024.
B-Spec Rear Sway Bar Request for Nissan Versa and Versa Note 2013- #35323suspension & brakesadded · suspension & brakesB-Spec Nissan Versa and Versa Note 2013–2019 permitted Hardrace HR-Q0146 19mm rear sway bar.
GT2 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.
GT2 GT Direct Injection allowance and rules #35437engineadded · engineGT1, GT2, GT3, GTL, GTX Direct Injection now permitted if original equipment.
GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB #35385weight -150 lbsfaster · weightGT2 Chevrolet Corvette 7011 OEM 7-liter minimum weight reduces to 3125 lbs, down 150 lbs.
GT2 GT2/3 remove Direction Injection not allowed in Spec line notes #35439engineadded · engineGT2 Nissan and GT3 Mazda, Mitsubishi 4G93, Nissan QR25DE/DD, QE25DE/DD now permit Direct Injection per 9.1.2.F.7.5.E.
B-Spec B-Spec Hankook Tire for Regionals #35055tyres & wheelstyres & wheelsB-Spec Hankook tires allowed at regionals only through June 30, 2024; Goodyear becomes sole legal tire July 1, 2024.
B-Spec Update 12-19 Nissan Versa Spec Line & Adjust BOP #35074weight -60 lbsfaster · weightB-Spec Nissan Versa Note Hatchback minimum weight drops 60 lbs to 2490; sedan line expanded to 2012–2019; 2013+ model deleted.
B-Spec Clarifying the ECU and Data Acquisition language #35236wordingwordingB-Spec and C-Spec clarify ECU must be unaltered OE, no altering devices allowed in grid to post-impound, and data acquisition systems expanded with new sensor types permitted.
GT2 Dodge Viper Gen 3 hybrid Kit Update Request #35200engineslower · engineGT2 Dodge Viper Gen 3 hybrid kit restrictor reduced from 50mm to 45mm flat plates in 8300 class.
B-Spec Mazda 3i 2010-2013 5-Speed Manual Gear Ratios #34820wordingwordingC-Spec Mazda 3i 2010-2013 5-speed manual third gear ratio changes from 3.84 to 1.84.
B-Spec Error Correction #34955wordingwordingC-Spec Dodge Dart 14-16 displacement corrected to 1998 cc, bore and stroke to 88.0 x 82.0 mm.
GT2 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.
B-Spec B-Spec Tire #35034tyres & wheelsadded · tyres & wheelsB-Spec adds Goodyear Eagle RS dry and wet tires; Hankook restricted to regional events from 2024.
GT2 Late E & O #34966weightfaster · weightGT2-ST Dodge Viper including Comp Coupe, ACR/ACR-X adds VRL front fascia, 100 lbs weight reduction.
1:52.004Barry Boes · fastest of 15 · top 5 within 1.6s+0.918s (+0.83%)
1:52.865Jared Odrick · fastest of 15 · top 5 within 1.0s-0.183s (-0.16%)
164.0Tom Patton-0.2 mph (-0.1%)
2:22.707Riley Salyer · fastest of 25 · top 5 within 1.0s-0.238s (-0.17%)
2:23.732Richard Hromin · fastest of 23 · top 5 within 0.4s-0.087s (-0.06%)
110.7Chris Daughtery-1.6 mph (-1.4%)
+30.867squal +30.703s
127.3%qual 127.4%
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%)
+23.364squal +22.982s
120.7%qual 120.5%
41 rule changes (GT2: 19, B-Spec: 21, SM: 1)7 cars added · 7 engine · 6 weight · 3 induction · 3 suspension & brakes · 3 tyres & wheels · 1 aero · 5 wording · 6 other · C-Spec adds Chevrolet Cruze, Ford Focus, Honda Civic, Mazda 3i, Toyota Corolla, VW Jetta; updates Dodge Dart displacement to 2360 cc, Mazda3s model year, Toyota Corolla specs. · GT2 Mazda 20B rotary minimum weight reduced to 2280 lbs, with 100-lb penalty for Grand Am transaxle and independent rear suspension. · B-Spec Hyundai Accent GS Hatchback restrictor plate increases from 39 mm to 41 mm. · B-Spec Hyundai Accent GS Hatchback model years changed from 13–19 to 12–19. · GT2 BMW E46 M3, E36, Z3, 5000cc V8: 3.4L at 2575 lbs, 4.0L at 2900 lbs, 4.5L at 2950 lbs, 5.0L at 3000 lbs; S54 97mm stroke permitted at 2800 lbs. · GT2 Corvette C7 restrictor increases from 73mm to 77mm flat plate. · B-Spec adds Hankook 200/580R15 Z217 option alongside 205/50R15 C51; C-Spec specifies 225/45R17 DOT tires unmodified. · B-Spec and C-Spec Chevrolet Sonic 12-19 allowed ZZP Aluminum Radiator #ZZP-ZZ013; Hatch MT restrictor changed to 34mm. · B-Spec and C-Spec bumper caps may use machine screws and T-nuts or rivet-nuts; self-drilling, tapping, and sheet metal screws prohibited. · B-Spec and C-Spec allow CAN bus connections to data systems for reading only, removing prior OBD2 restriction. · B-Spec Ford Fiesta 5dr and 4dr lose 25 lbs minimum weight, to 2470. · B-Spec Ford Fiesta 5dr, Fiesta 4dr, Honda Fit, Mazda2 lose weight; Mini Cooper variants gain weight and larger restrictors. · C-Spec Mazda 3i Touring 2.0 Skyactive MT 12-13 added with 2000 cc, 2900 lbs, 155 hp, 4.105 final drive. · B-Spec minimum ride height set to 6 inches, C-Spec to 5½ inches. · B-Spec spring rate stays 500 lb front and rear; C-Spec rises to 600 lb front, 800 lb rear. Spring strapping allowed for rebound only. · B-Spec wheels gain 13 lb minimum weight; C-Spec wheels gain 17 lb minimum weight. · B-Spec and C-Spec allowed metal threaded inserts in plastic intake manifolds for throttle body fasteners. · B-Spec and C-Spec rules clarified: wording changes to category terminology, manual priority scope, and technical requirements; no performance specifications altered. · GT2 adds 2009-2012 Porsche Cayman S, 3.4L, RWD, no PDK transmission. · Fields Cardinal V8 added to GT1 with Ford V8 engine, 4.9L, 2100 lbs, fuel injection. · GT2 Ginetta G56 GTA may use Factory installed ProMap ECU Map. · B-Spec Mini Cooper R56 MT/AT and Clubman R55 fuel pressure regulator increased from 401mm to 40mm FPR with OBX header allowed. · B-Spec allows helper springs up to 500 lbs rate; tender springs now prohibited. · B-Spec Honda Fit 09-14 Automatic now permits any aftermarket exhaust or header; Manual unchanged. · GT2 Mazda 13B Street Port turbo changes from EFR 76/70 to BW7670 or Garrett G30-660 with 46mm TIR at 2280 lbs. · B-Spec Chevrolet Sonic, Honda Fit, and Mini Cooper split into separate manual and automatic spec lines with distinct gear ratios and final drive ratios. · B-Spec tire options changed to Hankook 205/50R15 C51 or 200/580R15 Z217; no mixing wet and dry tires. · GT2 Porsche SOHC 2478/2681/2992 turbos: EFR 76/70 compressor 42mm to 44mm, SIR to TIR designation. · GT2-ST Chevrolet Corvette 14-19 restrictor increases from 70 to 73 mm. · GT2 and GTL add Toyota 4A-F and 4A-FE 1.6L DOHC 16V engines as permitted options. · GT2 Mazda 13B turbocharger part number changed from EFR 70/76 to 76/70, compressor 42mm to 46mm. · GT2-ST BMW E36/46 spec line adds MA Shaw carbon/composite door and body kit options to notes. · GT3 normally aspirated cars may now use chokes instead of SIRs, same size as listed SIR, one per carburetor barrel. · GT3 2.0L 4-valve non-turbo engines may run unrestricted at 2060 lbs minimum weight. · GT2 Porsche 991.1 TBR 70–72mm, 991.2 weight 3100–3000lbs TBR 65–67mm, all 991/997 models ABS now free; GT2-ST Corvette and others flat plate 75–78mm, 74–77mm, 71–74mm, 68–71mm, 65–68mm per engine; Viper weight 3275–3125lbs all displacement… · SM Mazda MX-5 Miata 01-05 minimum weight rises to 2450 lbs, or 2465 with alternate bore. · GT2 TA2 and GTA throttle body part numbers updated to GM 12570790 or Edelbrock 33869/3870. · GT2 Ginetta G56 GTA may now use optional 18" x 9" and 18" x 10" wheels. · GT2/ST BMW E36/E46 Z3 5000cc V8 now permits MAShaw body kit: wide body, M3 front bumper with splitter, fenders, rockers, flairs, rear bumper. · B-Spec Honda Fit 15-19 minimum weight cut to 2575 lbs from 2800 lbs. · GT2 Chevrolet Corvette L76 5967 restrictor increases from 73 mm to 74 mm.showhide
B-Spec Initial car classifications and spec lines #34461cars addedaddedC-Spec adds Chevrolet Cruze, Ford Focus, Honda Civic, Mazda 3i, Toyota Corolla, VW Jetta; updates Dodge Dart displacement to 2360 cc, Mazda3s model year, Toyota Corolla specs.
GT2 GT2 Mazda 20B 3 rotor ENO #34765weight -220 lbsfaster · weightGT2 Mazda 20B rotary minimum weight reduced to 2280 lbs, with 100-lb penalty for Grand Am transaxle and independent rear suspension.
B-Spec Hyundai Accent Restrictor Plate #34331inductionfaster · inductionB-Spec Hyundai Accent GS Hatchback restrictor plate increases from 39 mm to 41 mm.
B-Spec Hyundai Accent 2012 Model #34332cars addedaddedB-Spec Hyundai Accent GS Hatchback model years changed from 13–19 to 12–19.
GT2 appendix letter #33635 #34206cars addedaddedGT2 BMW E46 M3, E36, Z3, 5000cc V8: 3.4L at 2575 lbs, 4.0L at 2900 lbs, 4.5L at 2950 lbs, 5.0L at 3000 lbs; S54 97mm stroke permitted at 2800 lbs.
GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body #34342enginefaster · engineGT2 Corvette C7 restrictor increases from 73mm to 77mm flat plate.
B-Spec Allow ZZP Sonic Aluminum Radiator 1.68 #33660wordingwordingB-Spec and C-Spec Chevrolet Sonic 12-19 allowed ZZP Aluminum Radiator #ZZP-ZZ013; Hatch MT restrictor changed to 34mm.
B-Spec Fasteners for Bumper Caps #33797otheraddedB-Spec and C-Spec bumper caps may use machine screws and T-nuts or rivet-nuts; self-drilling, tapping, and sheet metal screws prohibited.
B-Spec Allow CAN Bus Connection to Data Systems #33806otheraddedB-Spec and C-Spec allow CAN bus connections to data systems for reading only, removing prior OBD2 restriction.
B-Spec Request Ford Fiesta weight reduction 25lbs #33890weight -25 lbsfaster · weightB-Spec Ford Fiesta 5dr and 4dr lose 25 lbs minimum weight, to 2470.
B-Spec BoB Adjustments #34208weight -25 lbsunclearB-Spec Ford Fiesta 5dr, Fiesta 4dr, Honda Fit, Mazda2 lose weight; Mini Cooper variants gain weight and larger restrictors.
B-Spec T5 Mazda 3 Spec Line Addition #33536cars addedaddedC-Spec Mazda 3i Touring 2.0 Skyactive MT 12-13 added with 2000 cc, 2900 lbs, 155 hp, 4.105 final drive.
B-Spec T5 Ride Height Rules. #33552suspension & brakesadded · suspension & brakesB-Spec minimum ride height set to 6 inches, C-Spec to 5½ inches.
B-Spec T5 Spring Allowance #33557suspension & brakesfaster · suspension & brakesB-Spec spring rate stays 500 lb front and rear; C-Spec rises to 600 lb front, 800 lb rear. Spring strapping allowed for rebound only.
B-Spec Threaded Metal Inserts for Plastic Intake Manifolds #34164otheraddedB-Spec and C-Spec allowed metal threaded inserts in plastic intake manifolds for throttle body fasteners.
B-Spec T5 Rules Feedback #33595wordingwordingB-Spec and C-Spec rules clarified: wording changes to category terminology, manual priority scope, and technical requirements; no performance specifications altered.
GT2 Request to class 2011 Porsche Cayman S #33771cars addedaddedGT2 adds 2009-2012 Porsche Cayman S, 3.4L, RWD, no PDK transmission.
GT2 Please classify Fields Cardinal V8 #33784cars addedaddedFields Cardinal V8 added to GT1 with Ford V8 engine, 4.9L, 2100 lbs, fuel injection.
GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class #33825engineadded · engineGT2 Ginetta G56 GTA may use Factory installed ProMap ECU Map.
B-Spec Early Model Mini #33363wordingunclearB-Spec Mini Cooper R56 MT/AT and Clubman R55 fuel pressure regulator increased from 401mm to 40mm FPR with OBX header allowed.
B-Spec Helper Versus Tender springs. #33866suspension & brakessuspension & brakesB-Spec allows helper springs up to 500 lbs rate; tender springs now prohibited.
B-Spec Split up Spec lines for Automatic/Manual 2nd Gen Fit #33292otheraddedB-Spec Honda Fit 09-14 Automatic now permits any aftermarket exhaust or header; Manual unchanged.
GT2 GT2 Mazda 13B Turbo #33729engineengineGT2 Mazda 13B Street Port turbo changes from EFR 76/70 to BW7670 or Garrett G30-660 with 46mm TIR at 2280 lbs.
B-Spec Request to Split Spec Lines for Automatic Models #33270wordingwordingB-Spec Chevrolet Sonic, Honda Fit, and Mini Cooper split into separate manual and automatic spec lines with distinct gear ratios and final drive ratios.
B-Spec Tire Rule Request #33350tyres & wheelstyres & wheelsB-Spec tire options changed to Hankook 205/50R15 C51 or 200/580R15 Z217; no mixing wet and dry tires.
GT2 Request Permission to Use a Substitute Turbo #33337engineengineGT2 Porsche SOHC 2478/2681/2992 turbos: EFR 76/70 compressor 42mm to 44mm, SIR to TIR designation.
GT2 Request to Reduce Restriction on C7 GT2 Corvette #33342enginefaster · engineGT2-ST Chevrolet Corvette 14-19 restrictor increases from 70 to 73 mm.
GT2 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.
GT2 GT2 Mazda 13b turbocharger part # update #33437enginefaster · engineGT2 Mazda 13B turbocharger part number changed from EFR 70/76 to 76/70, compressor 42mm to 46mm.
GT2 GT2-ST BMW E36/46 spec line remove #33610otheraddedGT2-ST BMW E36/46 spec line adds MA Shaw carbon/composite door and body kit options to notes.
GT2 GT3 Choke option effective 1-01-2023 #33669inductionadded · inductionGT3 normally aspirated cars may now use chokes instead of SIRs, same size as listed SIR, one per carburetor barrel.
GT2 GT3 2.0L choke/weight option #33670otheraddedGT3 2.0L 4-valve non-turbo engines may run unrestricted at 2060 lbs minimum weight.
GT2 BOP adjustment for GT2 & GT2-ST #33681inductionfaster · inductionGT2 Porsche 991.1 TBR 70–72mm, 991.2 weight 3100–3000lbs TBR 65–67mm, all 991/997 models ABS now free; GT2-ST Corvette and others flat plate 75–78mm, 74–77mm, 71–74mm, 68–71mm, 65–68mm per engine; Viper weight 3275–3125lbs all displacement…
SM BOP for NB1 and NB2 #32309weightslower · weightSM Mazda MX-5 Miata 01-05 minimum weight rises to 2450 lbs, or 2465 with alternate bore.
GT2 GT2 (TA2)/GTA Part Number Update #33315wordingwordingGT2 TA2 and GTA throttle body part numbers updated to GM 12570790 or Edelbrock 33869/3870.
GT2 Ginetta G56 GTA - Optional Wheels #33357tyres & wheelsadded · tyres & wheelsGT2 Ginetta G56 GTA may now use optional 18" x 9" and 18" x 10" wheels.
GT2 Allow the MAShaw Body Kit on the GT2/ST Spec Line for BMW E36/E46 #32447aeroadded · aeroGT2/ST BMW E36/E46 Z3 5000cc V8 now permits MAShaw body kit: wide body, M3 front bumper with splitter, fenders, rockers, flairs, rear bumper.
B-Spec Utilize the Data - Make BoP Changes #32179weight -225 lbsfaster · weightB-Spec Honda Fit 15-19 minimum weight cut to 2575 lbs from 2800 lbs.
GT2 Request for C5/C6 Corvette Restrictor Size Review #32982enginefaster · engineGT2 Chevrolet Corvette L76 5967 restrictor increases from 73 mm to 74 mm.
1:51.086Andrew Aquilante · fastest of 23 · top 5 within 1.1s+0.904s (+0.82%)
1:53.048Daniel Bender · fastest of 17 · top 5 within 3.1s+0.573s (+0.51%)
164.2Scotty B White+1.4 mph (+0.9%)
2:22.945Steve Introne · fastest of 30 · top 5 within 1.3s+0.577s (+0.41%)
2:23.819Riley Salyer · fastest of 30 · top 5 within 0.8s+1.725s (+1.21%)
112.3Matt Giuffre+0.1 mph (+0.1%)
+30.771squal +31.859s
127.2%qual 128.7%
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%)
+26.059squal +23.578s
123.1%qual 121.2%
25 rule changes (GT2: 14, B-Spec: 10, SM: 1)9 cars added · 4 engine · 4 suspension & brakes · 1 induction · 4 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. · Ginetta GTA G56 added to GT2 as spec car, 2600 lbs, 3.7L Ford V6 sealed, 6-speed Quaife sequential. · B-Spec Mazda2 10-14 gains approved rear sway bar options 0000-04-2203-RR or 0000-04-2312. · GT2 adds approved carbon roof suppliers and part numbers for BMW E36 and E46 models to Notes. · GT2 BMW E46 M3, E36, Z3, and 5000cc V8 may use 95mm S54 crankshaft at +150 lbs. · Audi R8 GT4 added to GT2 at 5.2L, 3000 lbs minimum weight, factory restrictor. · B-Spec Hyundai Accent GS and Kia Rio 5-door restrictor increased from 36mm to 39mm flat plate. · GT2 shock absorber attachment points clarified as movable; wording correction only. · GT2 Porsche 104.0 x 88.0 SOHC minimum weight increases to 2090 lbs; EFR 76/70 turbo allowances added for three Porsche engines at specific weights. · SM Majors must run authorized Penske shock and mount; Regional competitors not required until further evaluation. · B-Spec allows spring straps or zip ties to body for rebound control; OEM or kit bump stop requirement removed. · B-Spec strut tower modifications permitted for camber adjustment only, inboard movement, with shims or eccentric bolts on other suspension. · B-Spec Mazda2 10-14 allowed undertray part numbers corrected to DO8C-56-110A, DO8C-56-311, DO7A-56-321. · Ginetta G40 added to GT2 with Mazda MZR/L5-VE engine, 2488cc or 2399cc, 1950 lbs base weight. · Toyota Supra GT4 added to GT2-ST with 3000cc displacement, 3000 lb minimum weight, factory restrictor. · GT2 Porsche 944/924 may use ERC 76/70 Turbo instead of Jayco super 50. · B-Spec classifies Nissan Versa S 2020- at 1598cc, 2618mm wheelbase, 2700 lbs minimum weight. · B-Spec: Toyota/Scion IA Sedan 2016–2020 added at 1496cc, 2700 lbs, 38mm FPR. · B-Spec Mazda 2 (10-14) removes Bilstein B14 kit, adds Powerflex bushings, radiator, three cat-delete headers, and undertray. · GT2-ST Porsche Cayman 05-15 throttle body restrictor increased from 70mm to 75mm. · Honda Fit 2007-2008 automatic added to B-Spec at 2525 lbs with 1499 cc engine. · GT2 Porsche Cayman 05-15 4.0L and 4.2L swap flat plate restrictor for throttle body restrictor at 2700 lbs. · B-Spec upper strut slotted plates no longer required to use manufacturer's original bolt holes. · GT2 Mazda 13B street port gains EFR 70/76 turbocharger with 42mm inlet restrictor at 2280 lbs minimum. · GT3 Volkswagen Fun Cup Beetle EVO3 classified, sealed SOHC 1984cc engine, 2060 lbs minimum weight.showhide
GT2 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.
GT2 Addendum to letter #32514 Ginetta GTA G56 #33076cars addedaddedGinetta GTA G56 added to GT2 as spec car, 2600 lbs, 3.7L Ford V6 sealed, 6-speed Quaife sequential.
B-Spec Request new Mazda Rear Swaybar #32769suspension & brakesadded · suspension & brakesB-Spec Mazda2 10-14 gains approved rear sway bar options 0000-04-2203-RR or 0000-04-2312.
GT2 Information requested for carbon roofs on BMW E36/E46 cars in GT2 #32682cars addedaddedGT2 adds approved carbon roof suppliers and part numbers for BMW E36 and E46 models to Notes.
GT2 Request to Allow the 95mm S54 BMW Crankshaft in GT2-ST #32698engineadded · engineGT2 BMW E46 M3, E36, Z3, and 5000cc V8 may use 95mm S54 crankshaft at +150 lbs.
GT2 Request to classify Audi R8 FIA GT4 to GT2 #32805cars addedaddedAudi R8 GT4 added to GT2 at 5.2L, 3000 lbs minimum weight, factory restrictor.
B-Spec Request to Remove Part Numbers from Kia/Hyundai Spec Lines #32378inductionfaster · inductionB-Spec Hyundai Accent GS and Kia Rio 5-door restrictor increased from 36mm to 39mm flat plate.
GT2 Typo in rules for shocks #32308wordingwordingGT2 shock absorber attachment points clarified as movable; wording correction only.
GT2 additional response to letters #31898 & 32083 #32424engine +140 lbsslower · engineGT2 Porsche 104.0 x 88.0 SOHC minimum weight increases to 2090 lbs; EFR 76/70 turbo allowances added for three Porsche engines at specific weights.
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.
B-Spec Request spring attachment #31351suspension & brakessuspension & brakesB-Spec allows spring straps or zip ties to body for rebound control; OEM or kit bump stop requirement removed.
B-Spec Limit Rear Camber to 1.75 Degrees Section 9.1.10.E.35 #31393suspension & brakessuspension & brakesB-Spec strut tower modifications permitted for camber adjustment only, inboard movement, with shims or eccentric bolts on other suspension.
B-Spec Letter 31442 Part# Correction #32060wordingwordingB-Spec Mazda2 10-14 allowed undertray part numbers corrected to DO8C-56-110A, DO8C-56-311, DO7A-56-321.
GT2 Request to Classify Ginetta G40 in GT2 #31597cars addedaddedGinetta G40 added to GT2 with Mazda MZR/L5-VE engine, 2488cc or 2399cc, 1950 lbs base weight.
GT2 2021 Supra GR GT4 #31737cars addedaddedToyota Supra GT4 added to GT2-ST with 3000cc displacement, 3000 lb minimum weight, factory restrictor.
GT2 Proposed Technical Bulletin #31900otherunclearGT2 Porsche 944/924 may use ERC 76/70 Turbo instead of Jayco super 50.
B-Spec Request to Classify 2020-21 Versa S #30759cars addedaddedB-Spec classifies Nissan Versa S 2020- at 1598cc, 2618mm wheelbase, 2700 lbs minimum weight.
B-Spec Request to Classify the Toyota IA sedan & Scion IA Sedan for 2022 #31045cars addedaddedB-Spec: Toyota/Scion IA Sedan 2016–2020 added at 1496cc, 2700 lbs, 38mm FPR.
GT2 GT2/ST Porsche Cayman #31451 correct TBR size error #31991enginefaster · engineGT2-ST Porsche Cayman 05-15 throttle body restrictor increased from 70mm to 75mm.
B-Spec Request to add 2007-2008 Honda Fit #30853cars addedaddedHonda Fit 2007-2008 automatic added to B-Spec at 2525 lbs with 1499 cc engine.
GT2 Restrictor Clarification for 2015 Cayman #31451otherunclearGT2 Porsche Cayman 05-15 4.0L and 4.2L swap flat plate restrictor for throttle body restrictor at 2700 lbs.
B-Spec Rules Clarification of Body and Camber Plates #30814suspension & brakessuspension & brakesB-Spec upper strut slotted plates no longer required to use manufacturer's original bolt holes.
GT2 Turbo Request for 13B Engine #30656engineadded · engineGT2 Mazda 13B street port gains EFR 70/76 turbocharger with 42mm inlet restrictor at 2280 lbs minimum.
GT2 Request car classification #31032cars addedaddedGT3 Volkswagen Fun Cup Beetle EVO3 classified, sealed SOHC 1984cc engine, 2060 lbs minimum weight.
1:39.665Andrew Aquilante · fastest of 22 · top 5 within 1.8s-0.254s (-0.25%)
2:03.513Tim Kezman · fastest of 18 · top 5 within 9.6s+22.537s (+22.32%)
163.7Jonathan Start
2:03.121John Phillips · fastest of 60 · top 5 within 1.2s-0.045s (-0.04%)
2:03.971Steve Introne · fastest of 60 · top 5 within 0.4s-0.079s (-0.06%)
111.2David Oliveira
+0.458squal +23.456s
100.4%qual 123.5%
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
-4.676squal +18.030s
96.2%qual 118.1%
39 rule changes (GT2: 16, B-Spec: 22, SM: 1)8 cars added · 6 weight · 4 engine · 3 suspension & brakes · 2 aero · 2 tyres & wheels · 9 wording · 5 other · B-Spec upper strut slotted plates must use existing chassis structure, no longer limited to manufacturer's original bolt holes. · GT2 Dodge Viper ACR/ACR-X8300 front fascia loses 100 lbs, to 3175 VRL. · GT2 adds 04-06 World Challenge Pontiac GTO, 6062 cc, 3000 lbs minimum, World Challenge rules. · GTA part numbers updated: 0-80541-1 to 0-80541-2 in two locations and 6010 to 6014X in TA2 Appendix. · Grullon GT 2.0L Acura K20 moved from GTX to GT2-ST class at 2350 lbs unrestricted. · B-Spec Mazda2 10–14 gains optional header PN 0000-06-2410 with 70 lb. weight penalty. · GT2-ST Porsche Cayman restrictor increases from 65mm to 75mm flat plate at 2700 lbs. · GT2 Dodge Viper VRL Spec minimum weight reduced 100 lbs to 3275. · TA2 cars may run prior generation rules or current Trans Am rules at 2930 lbs minimum weight with free tire make and size. · B-Spec Honda Fit (09-14, 15-19) and Mini Cooper (R50, R56, 2011-13) add automatic transmission ratio and final drive options permitting Setrab 50-119-7612 cooler. · B-Spec Honda Fit 2007-08 added with 1499 cc displacement, 2450 mm wheelbase, 2525 lbs minimum weight. · B-Spec Ford Fiesta rear sway bar: Eibach #35143.312 or #35143.320 now allowed. · B-Spec restrictor changes from 0.060" to 0.050"-0.079" range. · B-Spec: rear window wipers and wiper motor removal now allowed. · B-Spec R60 and R61 MINI allow 4-lug hub conversion with specified front and rear bearings and brake rotors. · B-Spec Mazda2 10-14 minimum weight rises to 2380 lbs; new header PN 0000-06-2401 required after 1/1/2023. · B-Spec Honda Fit eligible years extended from 2009–2012 to 2009–2014. · B-Spec Hyundai Accent GS and Kia Rio 5-door restrictor reduced from 40mm to 36mm flat plate. · B-Spec must use Hankook P205/50ZR15 Z214 C51 or Z217 rain tyre for SCCA Majors, Super Tour and Runoffs. · GT2 Sunbeam SBF engine firing order 1,3,7,2,6,5,4,8 now available for Boss 302 variants. · SM adds procedure for CRB-approved obsolete parts and BOP testing in sanctioned events with point forfeiture. · B-Spec tire rules clarified: Hankook Z214 dry and Z217 rain required at Majors/Super Tour/Runoffs after 6-1-2021; regionals allow any DOT race tire through 2021; wet tire permits 0.2" lower ride height. · B-Spec restrictor thickness set to 0.060 inches plus or minus 0.005 inches. · GT2-ST Corvette (-2019) LS2 and L76 5967 gain 100 lbs minimum weight to 3100; 6162 and 7011 variants gain 50–100 lbs; L76 restrictor opens 70 to 73 mm. · GT2 rear engine opening position requirement removed. · GT2 Ford Mustang/Thunderbird Boss 302 firing order changes from unrestricted to optional later SBF 302 order 1,3,7,2,6,5,4,8. · B-Spec Hyundai Accent GS Hatchback 2013-2019 classified at 2525 lbs with 40mm flat plate restrictor and specific suspension and sump parts allowed. · B-Spec Mini Cooper Countryman R60 and Paceman R61 production years corrected from 2011–13 to 2011–16. · B-Spec Toyota Yaris Hatch model year corrected from 07-12 to 07-11, and 12-18 Yaris renamed to Yaris Hatch. · B-Spec Mini Cooper all models: ride height minimum 5 inches measured from metal under door rocker molding. · B-Spec brake dust shields may now be removed or modified by removing material. · B-Spec Mini Cooper Clubman R55 11-15 now allows OBX header 10-2101-2S with 40mm flat plate restrictor. · GT2 allows ABS braking systems if shown on the individual Spec Line. · GT2 Corvette C6 and C7 spec lines split for clarification; C7 LS2, L76, LS3, LT1, LS7 weights raised 100–150 lbs effective 3/1/2021. · GT2 Ford Mustang/Thunderbird Boss 302 firing order becomes unrestricted. · GT2 BMW E46 M3 and E36, Z3, and 5000cc V8 minimum weight reduced to 2500 lbs. · B-Spec clarifies B14 Bilstein shock approval process; removes specific B14 kit allowances from eight car spec lines, requiring CRB approval instead. · B-Spec removes Chevrolet Sonic (12-19); renames Toyota Yaris (07-12) to Hatch; limits Yaris Sedan to 07-12. · GT2 Chrysler/Dodge/Plymouth DOHC 2429cc engine classified, 1950 lbs minimum weight.showhide
B-Spec Rules Clarification of Body and Camber Plates #30814suspension & brakesadded · suspension & brakesB-Spec upper strut slotted plates must use existing chassis structure, no longer limited to manufacturer's original bolt holes.
GT2 Correct letter 30565 GT2/ST #31088weightfaster · weightGT2 Dodge Viper ACR/ACR-X8300 front fascia loses 100 lbs, to 3175 VRL.
GT2 Request the 04-06 Pontiac GTO WC Car Be Added to the GT2/ST Chart #30339cars addedaddedGT2 adds 04-06 World Challenge Pontiac GTO, 6062 cc, 3000 lbs minimum, World Challenge rules.
GT2 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.
GT2 GTX class correction to GT2/ST #30973cars addedaddedGrullon GT 2.0L Acura K20 moved from GTX to GT2-ST class at 2350 lbs unrestricted.
GT2 Porsche Cayman Engine Modification and Engine Request #30472enginefaster · engineGT2-ST Porsche Cayman restrictor increases from 65mm to 75mm flat plate at 2700 lbs.
GT2 Request weight clarification Viper CC #30565weightfaster · weightGT2 Dodge Viper VRL Spec minimum weight reduced 100 lbs to 3275.
GT2 Variance, 2021 TA2 Rules vs GCR Appendix L #30641cars addedaddedTA2 cars may run prior generation rules or current Trans Am rules at 2930 lbs minimum weight with free tire make and size.
B-Spec Transmission Cooler Requests #30079otheraddedB-Spec Honda Fit (09-14, 15-19) and Mini Cooper (R50, R56, 2011-13) add automatic transmission ratio and final drive options permitting Setrab 50-119-7612 cooler.
B-Spec Request to classify the 07 Honda Fit #30083cars addedaddedB-Spec Honda Fit 2007-08 added with 1499 cc displacement, 2450 mm wheelbase, 2525 lbs minimum weight.
B-Spec Request Ford Fiesta Eibach Rear Sway Bar Part Number 35143.320 #30340suspension & brakesadded · suspension & brakesB-Spec Ford Fiesta rear sway bar: Eibach #35143.312 or #35143.320 now allowed.
B-Spec Restrictor rule #30474enginefaster · engineB-Spec restrictor changes from 0.060" to 0.050"-0.079" range.
B-Spec Rear wipers on all cars #30585aerofaster · aeroB-Spec: rear window wipers and wiper motor removal now allowed.
B-Spec Allow 4 lug hub conversion to R60 and R61 MINI #29863otheraddedB-Spec R60 and R61 MINI allow 4-lug hub conversion with specified front and rear bearings and brake rotors.
B-Spec Mazda2 header replacement #29944weight +50 lbsslower · weightB-Spec Mazda2 10-14 minimum weight rises to 2380 lbs; new header PN 0000-06-2401 required after 1/1/2023.
B-Spec Honda Fit Years on Spec Line #30078cars addedaddedB-Spec Honda Fit eligible years extended from 2009–2012 to 2009–2014.
B-Spec Hyundai/Kia restrictor size incorrect #30380engineslower · engineB-Spec Hyundai Accent GS and Kia Rio 5-door restrictor reduced from 40mm to 36mm flat plate.
B-Spec Clarify tire compound in rules #30387tyres & wheelstyres & wheelsB-Spec must use Hankook P205/50ZR15 Z214 C51 or Z217 rain tyre for SCCA Majors, Super Tour and Runoffs.
GT2 GT2 tiger firing order #30421wordingwordingGT2 Sunbeam SBF engine firing order 1,3,7,2,6,5,4,8 now available for Boss 302 variants.
SM Updates - Obsolete Parts & BOP Parts #30438wordingaddedSM adds procedure for CRB-approved obsolete parts and BOP testing in sanctioned events with point forfeiture.
B-Spec Spec Tire Recommendation #29480tyres & wheelstyres & wheelsB-Spec tire rules clarified: Hankook Z214 dry and Z217 rain required at Majors/Super Tour/Runoffs after 6-1-2021; regionals allow any DOT race tire through 2021; wet tire permits 0.2" lower ride height.
B-Spec Make restrictor thickness unique for B Spec #30349wordingwordingB-Spec restrictor thickness set to 0.060 inches plus or minus 0.005 inches.
GT2 GT2-ST CORVETTE CHANGES #30029weight +100 lbsslower · weightGT2-ST Corvette (-2019) LS2 and L76 5967 gain 100 lbs minimum weight to 3100; 6162 and 7011 variants gain 50–100 lbs; L76 restrictor opens 70 to 73 mm.
GT2 29742 Change new wording to read as: #30329wordingwordingGT2 Ford Mustang/Thunderbird Boss 302 firing order changes from unrestricted to optional later SBF 302 order 1,3,7,2,6,5,4,8.
B-Spec Request to Classify Hyundai Accent (RB) 2012-2019 #29484cars addedaddedB-Spec Hyundai Accent GS Hatchback 2013-2019 classified at 2525 lbs with 40mm flat plate restrictor and specific suspension and sump parts allowed.
B-Spec Countryman production years incorrect #29864wordingwordingB-Spec Mini Cooper Countryman R60 and Paceman R61 production years corrected from 2011–13 to 2011–16.
B-Spec Toyota Yaris Model Year Corrections #29896wordingwordingB-Spec Toyota Yaris Hatch model year corrected from 07-12 to 07-11, and 12-18 Yaris renamed to Yaris Hatch.
B-Spec Correction spec lines for ride height Mini Cooper all models #29952wordingwordingB-Spec Mini Cooper all models: ride height minimum 5 inches measured from metal under door rocker molding.
B-Spec Request to Allow Removal of Stock Brake Dust Shields #29981suspension & brakessuspension & brakesB-Spec brake dust shields may now be removed or modified by removing material.
B-Spec Request to allow OBX header and restrictor to R55 Clubman 08-10 #30024otheraddedB-Spec Mini Cooper Clubman R55 11-15 now allows OBX header 10-2101-2S with 40mm flat plate restrictor.
GT2 ABS Restrictions #30064otheraddedGT2 allows ABS braking systems if shown on the individual Spec Line.
GT2 Request change to engine firing order rule #29742engineadded · engineGT2 Ford Mustang/Thunderbird Boss 302 firing order becomes unrestricted.
GT2 Request E-46 BMW M3 balance of performance #29833weight -100 lbsfaster · weightGT2 BMW E46 M3 and E36, Z3, and 5000cc V8 minimum weight reduced to 2500 lbs.
B-Spec Request clarification of B14 shock package for any and all cars #29483wordingwordingB-Spec clarifies B14 Bilstein shock approval process; removes specific B14 kit allowances from eight car spec lines, requiring CRB approval instead.
B-Spec Cleanup of spec lines #29495cars addedremoved · cars addedB-Spec removes Chevrolet Sonic (12-19); renames Toyota Yaris (07-12) to Hatch; limits Yaris Sedan to 07-12.
GT2 Request for Bigger Engine in Plymouth Breeze #29380cars addedaddedGT2 Chrysler/Dodge/Plymouth DOHC 2429cc engine classified, 1950 lbs minimum weight.
2:12.298Andrew Aquilante · fastest of 20 · top 5 within 2.9s
2:14.279Andrew Aquilante · fastest of 19 · top 5 within 2.4s
162.2Scotty B White
2:52.033David Daughtery · fastest of 25 · top 5 within 1.9s
2:52.847Riley Salyer · fastest of 25 · top 5 within 0.8s
111.5Robert Iversen
+38.568squal +39.735s
128.7%qual 130.0%
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
+29.469squal +29.911s
121.9%qual 122.6%
45 rule changes (GT2: 26, B-Spec: 17, SM: 2)15 cars added · 6 engine · 6 weight · 3 suspension & brakes · 1 aero · 1 induction · 11 wording · 2 other · GT2 stock car bodies removal rescinded; 1997-current year commercially available stock car bodywork allowed. · GT2 Appendix L section 4.8.4.2.10.3.6 renumbered, eliminating subsections .17–.19. · GT2 TA2 wing width maximum clarified to 65 -5/16 inches, including end plates. · 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. · B-Spec Mini Cooper R56 40mm restrictor requirement removed; suspension parts and OBX header with restrictor now allowed. · GT1/GT2/GT3/GTL/GTX turbocharging and supercharging now permitted if listed on spec line. · Chevrolet Corvette (-2019) GT2-ST permitted LS1/LS6 alternate intake manifold, DORMAN part # 615-900. · GT2 997.2 GT3 Cup minimum weight reduced from 3000 to 2900 lbs. · GT2 BMW E46 M3, E36, Z3, and 5000cc V8 gain Trans Am SGT option: regular shifter 3000 lbs., paddle shifter plus 150 lbs. · GT2 allows up to four hood/fender louvered panels, max 600 sq inches total, min five slots each, ahead of windscreen. · SM rear brake caliper may use single bracket under upper retaining bolt head to prevent pin failure. · 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. · B-Spec wheelbase specifications converted from inches to millimetres for all cars across the class. · GT2 Dodge Viper 8.4 OEM minimum weight reduced to 3275 lbs. · GT2 Chevrolet Corvette -2019 OEM minimum weight reduced to 3275 lbs. · B-Spec Chevrolet Sonic adds 5dr Hatch with 34mm restrictor; both body styles allow Setrab FP119M221 transmission cooler for automatic cars. · B-Spec: multiple models allow specific suspension kits and damper assemblies, effective 2020-05-01. · B-Spec sunroof retention wording clarified; cars must retain sunroofs securely bolted unless rails adequately secure the panel. · B-Spec Ford Fiesta 5dr gets 36mm restrictor, 4dr gets 34mm; Honda Fit 09-12 loses 25 lbs to 2525; Fit 15-20 restrictor tightens to 30mm; Mini Cooper 07-10 gets 40mm restrictor. · GT2 Corvette -2019 LS6 allowed to reduce weight by 50 lbs. · GT2 Panoz GT-S may use TA2 Choice Engine with any 5-speed H-shift transmission. · GT2-ST Corvette LS2 restrictor increases from 70mm to 75mm flat plate; LSX block option added. · GT2-ST Corvette L76 added: 5967cc displacement, 3000 lb minimum weight, 70mm flat plate restrictor. · B-Spec Chevrolet Sonic, Fiat 500, Ford Fiesta 5dr and 4dr, Honda Fit model years expanded to include 2019 or through 2019. · B-Spec adds six Mini Cooper models (02-06 R50, 07-10 R55, 12-15 R58, 11-15 R55, 11-13 R60, R61), weights 2545–2625 lbs, four with 40 mm restrictor. · B-Spec fog lamps may now be removed; holes must be completely covered. · B-Spec adds Chevrolet Sonic 4dr Sedan 12–19, 1796 cc, 2650 lbs, with 32mm restrictor. · GT2 Porsche 991.2 GT3 Cup Car engine displacement corrected to 4.0L from 3.8L. · B-Spec automatic and CVT transmissions now legal for all permitted cars meeting their spec line; OEM paddle shifters acceptable. · B-Spec automatic transmissions may use auxiliary coolers on case-by-case approval with submitted part numbers. · GT1, GT2, GT3, GTL, GTX may use bonded-glass factory windshields without clips or straps if attached per original specifications. · GT2 Chevrolet SS replaces Dodge Charger; all stock car bodies removed from GT2 in 2021. · B-Spec adds Toyota Yaris Sedan 2007-, 1491 cc, 2400 lbs, with specified Bilstein, swaybar, and K&N intake. · B-Spec adds 2011-2016 Ford Fiesta 4dr Sedan, 1596 cc, 2495 lbs minimum weight. · B-Spec Kia Rio 5-door LX model years extended to 2012–2019. · B-Spec Mazda2 10-14: suspension parts, intake, exhaust header, and bushings added to allowed list. · 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. · 991.2 GT3 Cup Car added to GT2 at 3100 lbs with 63mm throttle body restrictor. · GT2 Acura NSX minimum weight cut from 3000 lbs to 2700 lbs. · GT2 Porsche 991.1 GT3 Cup restrictor size increases from 67 mm to 70 mm. · GT2 Porsche 996/997.1 GT3 Cup minimum weight drops to 2800 lbs. · GT2 Corvette -2019 restrictor reduced from 75 mm to 70 mm. · B-Spec Mini Cooper production years clarified to 2011-13.showhide
GT2 rescind GT2 stock car bodies removal #29219cars addedaddedGT2 stock car bodies removal rescinded; 1997-current year commercially available stock car bodywork allowed.
GT2 E&O Typos in Appendix L #29447wordingwordingGT2 Appendix L section 4.8.4.2.10.3.6 renumbered, eliminating subsections .17–.19.
GT2 GT2 wing width wording correction #29469wordingwordingGT2 TA2 wing width maximum clarified to 65 -5/16 inches, including end plates.
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.
B-Spec Allowance Versus Requirement for R56 Mini Cooper #29127enginefaster · engineB-Spec Mini Cooper R56 40mm restrictor requirement removed; suspension parts and OBX header with restrictor now allowed.
GT2 GT Category Wording #29193wordingaddedGT1/GT2/GT3/GTL/GTX turbocharging and supercharging now permitted if listed on spec line.
GT2 997.2 E&O link to 27915 #29373weightfaster · weightGT2 997.2 GT3 Cup minimum weight reduced from 3000 to 2900 lbs.
GT2 Request for allowance Trans Am SGT #28951cars addedaddedGT2 BMW E46 M3, E36, Z3, and 5000cc V8 gain Trans Am SGT option: regular shifter 3000 lbs., paddle shifter plus 150 lbs.
GT2 Omitted GT2 fender/hood openings #29171aeroadded · aeroGT2 allows up to four hood/fender louvered panels, max 600 sq inches total, min five slots each, ahead of windscreen.
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.
GT2 TA2 Gurney flap wicker clarification #28874wordingwordingTA2 Gurney flap wording clarified: replace 'wicker bill' and 'wicker' with 'Gurney flap' throughout wing specifications.
GT2 STO Gurney flap wicker clarification #28883wordingwordingSTO rear wing rules clarify that wicker is called Gurney flap in two places; no performance change.
GT2 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.
B-Spec Request to change units on wheelbase for consistency with wording #28786wordingwordingB-Spec wheelbase specifications converted from inches to millimetres for all cars across the class.
GT2 Request to Adjust Weight of OEM 8.4 Viper #28739weight -50 lbsfaster · weightGT2 Dodge Viper 8.4 OEM minimum weight reduced to 3275 lbs.
GT2 Request to Adjust Weight of OEM Chevrolet Corvette #28896weight -50 lbsfaster · weightGT2 Chevrolet Corvette -2019 OEM minimum weight reduced to 3275 lbs.
B-Spec Transmission cooler for automatic equipped cars #28171cars addedaddedB-Spec Chevrolet Sonic adds 5dr Hatch with 34mm restrictor; both body styles allow Setrab FP119M221 transmission cooler for automatic cars.
B-Spec Spring Update for all models #28384suspension & brakesadded · suspension & brakesB-Spec: multiple models allow specific suspension kits and damper assemblies, effective 2020-05-01.
B-Spec Request to Cleanup Sunroof Wording #28401wordingwordingB-Spec sunroof retention wording clarified; cars must retain sunroofs securely bolted unless rails adequately secure the panel.
B-Spec B-Spec Balance of Performance based on 2018 and 2019 seasons #28394induction -25 lbsslower · inductionB-Spec Ford Fiesta 5dr gets 36mm restrictor, 4dr gets 34mm; Honda Fit 09-12 loses 25 lbs to 2525; Fit 15-20 restrictor tightens to 30mm; Mini Cooper 07-10 gets 40mm restrictor.
GT2 Request Corvette engine parity #28576weightfaster · weightGT2 Corvette -2019 LS6 allowed to reduce weight by 50 lbs.
GT2 Request to revisit Panoz GT-S BoP #28280cars addedaddedGT2 Panoz GT-S may use TA2 Choice Engine with any 5-speed H-shift transmission.
B-Spec Request for Model Years Updating #27850cars addedaddedB-Spec Chevrolet Sonic, Fiat 500, Ford Fiesta 5dr and 4dr, Honda Fit model years expanded to include 2019 or through 2019.
B-Spec Request to classify Min Cooper models #27861cars addedaddedB-Spec adds six Mini Cooper models (02-06 R50, 07-10 R55, 12-15 R58, 11-15 R55, 11-13 R60, R61), weights 2545–2625 lbs, four with 40 mm restrictor.
B-Spec remove fog lights #27947wordingremovedB-Spec fog lamps may now be removed; holes must be completely covered.
B-Spec add sonic sedan #27948cars addedaddedB-Spec adds Chevrolet Sonic 4dr Sedan 12–19, 1796 cc, 2650 lbs, with 32mm restrictor.
GT2 Request 991.2 Porsche engine displacement verify typo #28194enginefaster · engineGT2 Porsche 991.2 GT3 Cup Car engine displacement corrected to 4.0L from 3.8L.
B-Spec Request for Automatic Transmission Inclusion #27686cars addedaddedB-Spec automatic and CVT transmissions now legal for all permitted cars meeting their spec line; OEM paddle shifters acceptable.
B-Spec Request to Add Transmission Coolers to Automatics #27687otheraddedB-Spec automatic transmissions may use auxiliary coolers on case-by-case approval with submitted part numbers.
GT2 Windshield Clips #27323otheraddedGT1, GT2, GT3, GTL, GTX may use bonded-glass factory windshields without clips or straps if attached per original specifications.
GT2 Request to Add Chevrolet SS Body to Appendix L #27898cars addedremoved · cars addedGT2 Chevrolet SS replaces Dodge Charger; all stock car bodies removed from GT2 in 2021.
B-Spec Add Yaris Sedan #26797cars addedaddedB-Spec adds Toyota Yaris Sedan 2007-, 1491 cc, 2400 lbs, with specified Bilstein, swaybar, and K&N intake.
B-Spec Add 2011-2016 Fiesta Sedan #26798cars addedaddedB-Spec adds 2011-2016 Ford Fiesta 4dr Sedan, 1596 cc, 2495 lbs minimum weight.
B-Spec add 2015-2019 Kia Rio #26799cars addedaddedB-Spec Kia Rio 5-door LX model years extended to 2012–2019.
B-Spec Error and Omissions #27858suspension & brakesadded · suspension & brakesB-Spec Mazda2 10-14: suspension parts, intake, exhaust header, and bushings added to allowed list.
GT2 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.
GT2 Porsche 991.2 GT3 Cup GT2 Classification #27701cars addedadded991.2 GT3 Cup Car added to GT2 at 3100 lbs with 63mm throttle body restrictor.
GT2 Request for Acura NSX Spec Line Changes #27755weightfaster · weightGT2 Acura NSX minimum weight cut from 3000 lbs to 2700 lbs.
GT2 GT2 991.1 restrictor size change #27914enginefaster · engineGT2 Porsche 991.1 GT3 Cup restrictor size increases from 67 mm to 70 mm.
GT2 GT2 996/997.1 weight change #27915weight -100 lbsfaster · weightGT2 Porsche 996/997.1 GT3 Cup minimum weight drops to 2800 lbs.
GT2 GT2/ST Corvette comp adjustment #27920engineslower · engineGT2 Corvette -2019 restrictor reduced from 75 mm to 70 mm.
B-Spec Request for Correction of Production Years for Mini Cooper #27226wordingwordingB-Spec Mini Cooper production years clarified to 2011-13.
1:50.182Andrew Aquilante · fastest of 24 · top 5 within 4.5s
1:52.475Andrew Aquilante · fastest of 19 · top 5 within 3.3s
162.8Tom Patton
1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s
2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s
135.7Bryce Cornet
+23.341squal +4.942s
120.8%qual 104.5%
2:22.368Frank Schwartz · fastest of 26 · top 5 within 0.8s
2:22.094David Daughtery · fastest of 24 · top 5 within 0.8s
112.2John Phillips
+29.619squal +32.186s
126.3%qual 129.2%
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
+23.984squal +24.370s
121.3%qual 122.1%
33 rule changes (GT2: 21, B-Spec: 8, SM: 4)14 cars added · 5 weight · 2 aero · 2 engine · 7 wording · 3 other · B-Spec Mazda 2, Fiat 500, 2007–10 Mini Cooper permitted to replace primary cat/exhaust manifold with approved header, retaining oxygen sensors. · B-Spec removes time limit on car eligibility; cars now compete indefinitely once classified. · B-Spec Honda Fit model year range extended to include 2013. · B-Spec 2007-10 Mini Cooper adds OBX header part #10-2101-2S as E&O allowance. · GT2 TA2 cars must meet 2930 lbs minimum weight per current Trans Am rules or Appendix L. · GT2-ST Toyota Supra 3SGTE added: 2.0L, 2900 lbs minimum weight, 43mm restrictor. · Acura NSX all years classified to GT2-ST: 3.5L turbocharged, 3000 lbs minimum, 43mm restrictor, specific aero and turbo required. · GT2 TA2 minimum weight increases 100 lbs to 2930 pounds. · GT2 BMW E36/E46 M3 and Z3: 4.5L V8 permitted at 2950 lbs, 5.0L V8 at 3000 lbs, plus Flossman body kit allowed. · GTX tube frame cars now allowed fuel injection with maximum 90mm throttle body. · GTX adds Ligier JS2 R classification with restrictor and minimum weight. · GT2 Ford Mustang 5.2L classified at 3300 lbs minimum weight, 82mm single throttle body, carbon fiber body parts allowed. · GT1 and GT2/3/Lite remove ride height ground clearance rules; cars may now touch ground when tires deflate. · B-Spec added to GCR 9.3.26 fuel cell exception list; stock fuel tank permitted. · GT2/ST Porsche Cayman eligible model years extended from 2005–2011 to 2005–2015. · GT2 Porsche Cayman adds 4.0L with 65mm flat plate restrictor at 2700 lbs minimum weight. · SM fuel pump and filter now permitted as Mazda or OEM equivalent part. · 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. · B-Spec adds Canadian Nissan Micra Cup Car, 1598 cc, 2450 lbs minimum, with Micra Cup suspension kit allowed. · B-Spec Toyota Yaris 12-18 added with 1491cc engine, 3.55 first gear, Bilstein B14 suspension, K&N intake allowed. · B-Spec exhaust wording clarified: oxygen sensors must stay stock location, primary catalyst unmodifiable. · GT2 BMW E46 M3, E36, Z3, and 5000cc V8 may now use Flossman body kit. · GT2 TA2 clarifies rules; shock caps to $850, brake calipers to $550, pads to $250/axle, wheels to $175 each; allows carbon fiber rear wing; engine setback 21.75 inches max (A–F) or 24 inches (G); carbureted engine displacement 366 cubic in… · GT2 adds BMW 1 Series E82 2008–2012 with N52B30 engine, 2996 cc, 2140 lbs minimum weight. · GT2 Porsche Cayman 05-11 minimum weight drops to 2800 lbs; STO and X51 motor variants noted at 2950 and 2850 lbs. · GT2 Ford Mustang 05- with Ford Racing 5.2l Aluminator engine classified: 5200cc displacement, 3400 lbs minimum weight, 2×41mm flat plate restrictor. · GT2 Porsche 996/997.1 GT3 Cup: add 3.6L displacement and 2900 lbs minimum weight; remove aftermarket exhaust header allowance for 996. · GT2 Ford Mustang FP350S minimum weight reduced 100 lbs to 3400. · GT2 Ford Mustang 05- EcoBoost added: 3500 cc, 3200 lbs minimum, 41 mm restrictor. · GT2 Mazda RX7 Downing GTS body kit allowed without 75 lbs. weight penalty. · 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.showhide
B-Spec Request for Corrections to 9.1.10 E Item #27 D and E #27224aeroadded · aeroB-Spec Mazda 2, Fiat 500, 2007–10 Mini Cooper permitted to replace primary cat/exhaust manifold with approved header, retaining oxygen sensors.
B-Spec Remove wording in the B-spec rules #27388wordingaddedB-Spec removes time limit on car eligibility; cars now compete indefinitely once classified.
B-Spec Request to add 2013 Honda Fit model year #27491cars addedaddedB-Spec Honda Fit model year range extended to include 2013.
B-Spec Request to allow OBX Header for 2007-10 Mini Cooper #26977engineadded · engineB-Spec 2007-10 Mini Cooper adds OBX header part #10-2101-2S as E&O allowance.
GT2 TA2 Weight Clarification #27077weightslower · weightGT2 TA2 cars must meet 2930 lbs minimum weight per current Trans Am rules or Appendix L.
GT2 Request to classify Toyota Supra with 3SGTE engine #25185cars addedaddedGT2-ST Toyota Supra 3SGTE added: 2.0L, 2900 lbs minimum weight, 43mm restrictor.
GT2 Request to Classify Acura NSX from T1 to GT2? #26121cars addedaddedAcura NSX all years classified to GT2-ST: 3.5L turbocharged, 3000 lbs minimum, 43mm restrictor, specific aero and turbo required.
GT2 Request for TA2 BOP in GT2 #26509weightslower · weightGT2 TA2 minimum weight increases 100 lbs to 2930 pounds.
GT2 Request for e36/e46 bmw 4500 cc v8 at 2950lbs in GT2/ST #26106cars addedaddedGT2 BMW E36/E46 M3 and Z3: 4.5L V8 permitted at 2950 lbs, 5.0L V8 at 3000 lbs, plus Flossman body kit allowed.
GT2 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engineadded · engineGTX tube frame cars now allowed fuel injection with maximum 90mm throttle body.
GT2 Request to Classify Ligier JS2 R #26535cars addedaddedGTX adds Ligier JS2 R classification with restrictor and minimum weight.
GT2 Request Ford Perfomance 5.2L crate engine FPR clarification #26159cars addedaddedGT2 Ford Mustang 5.2L classified at 3300 lbs minimum weight, 82mm single throttle body, carbon fiber body parts allowed.
GT2 Request Ride Height Clarification #26600wordingfasterGT1 and GT2/3/Lite remove ride height ground clearance rules; cars may now touch ground when tires deflate.
B-Spec Request to add B-Spec to GCR 9.3.26 fuel cell #26132cars addedaddedB-Spec added to GCR 9.3.26 fuel cell exception list; stock fuel tank permitted.
GT2 Request Porsche Cayman year classification #26241cars addedaddedGT2/ST Porsche Cayman eligible model years extended from 2005–2011 to 2005–2015.
SM Request to allow aftermarket fuel filters. #26370otheraddedSM fuel pump and filter now permitted as Mazda or OEM equivalent part.
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.
B-Spec Request to classify Canadian Nissan Micra Cup cars #25216cars addedaddedB-Spec adds Canadian Nissan Micra Cup Car, 1598 cc, 2450 lbs minimum, with Micra Cup suspension kit allowed.
B-Spec Request updated Toyota Yaris Spec Lines #25483cars addedaddedB-Spec Toyota Yaris 12-18 added with 1491cc engine, 3.55 first gear, Bilstein B14 suspension, K&N intake allowed.
B-Spec Update wording of exhaust #26022wordingwordingB-Spec exhaust wording clarified: oxygen sensors must stay stock location, primary catalyst unmodifiable.
GT2 ST/GT2 BMW Flossman Kit Clarification #22138aeroadded · aeroGT2 BMW E46 M3, E36, Z3, and 5000cc V8 may now use Flossman body kit.
GT2 Request Clarification/Revision of Appendix L (2013 TA2 Rules) #25110wordingwordingGT2 TA2 clarifies rules; shock caps to $850, brake calipers to $550, pads to $250/axle, wheels to $175 each; allows carbon fiber rear wing; engine setback 21.75 inches max (A–F) or 24 inches (G); carbureted engine displacement 366 cubic in…
GT2 Request to classify BMW E82 (1 series) into GT2 #25539cars addedaddedGT2 adds BMW 1 Series E82 2008–2012 with N52B30 engine, 2996 cc, 2140 lbs minimum weight.
GT2 2010 Cayman Street Tuner Into an STO Car,Addendum #25545weightfaster · weightGT2 Porsche Cayman 05-11 minimum weight drops to 2800 lbs; STO and X51 motor variants noted at 2950 and 2850 lbs.
GT2 Request - Classify Ford Performance 5.2l #25716cars addedaddedGT2 Ford Mustang 05- with Ford Racing 5.2l Aluminator engine classified: 5200cc displacement, 3400 lbs minimum weight, 2×41mm flat plate restrictor.
GT2 Request for Ford FP 350s Weight Reduction #25806weightfaster · weightGT2 Ford Mustang FP350S minimum weight reduced 100 lbs to 3400.
GT2 Request to Classify EcoBoost Mustang #25842cars addedaddedGT2 Ford Mustang 05- EcoBoost added: 3500 cc, 3200 lbs minimum, 41 mm restrictor.
GT2 Request to Remove Mazda RX 7 Body Work Penalty #26024weightfaster · weightGT2 Mazda RX7 Downing GTS body kit allowed without 75 lbs. weight penalty.
GT2 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.
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 GT2's best on the same day: the weather, the track and its configuration cancel out, so one figure compares across tracks and years where lap times cannot. 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.