BoP Lab / Classes / GT2

GT2 vs T2 vs FB pace at every track

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.

Class · click a class to switch, + to compare alongside (up to 4)

AS +B-Spec +EP +FA +vsFB ×FC +FE2 +FF +FP +FV +FX +GT1 +GT2×GTX +HP +P +P2 +SM +SMX +SRF3 +STL +STU +T1 +vsT2 ×T3 +T4 +Show 50 inactive classes

Series Runoffs Super Tour Both

Reference · what % is measured against

Tracks · untick to narrow Auto Club Speedway Barber Motorsports Park Blackhawk Farms Raceway Buttonwillow Raceway Park Circuit of St. Louis (formerly Gateway Motorsports Circuit of the Americas Daytona International Speedway Grattan Raceway Hallett Motor Racing Circuit Homestead-Miami Speedway Indianapolis Motor Speedway Laguna Seca Michelin Raceway Road Atlanta Mid-Ohio Sports Car Course New Jersey Motorsports Park NOLA Motorsports Park Pacific Raceways Pittsburgh International Race Complex Portland International Raceway Pueblo Motorsports Park Road America Sebring International Raceway Sonoma Raceway Summit Point Raceway Thunderhill Raceway Park Virginia International Raceway Watkins Glen International Willow Springs Raceway World Wide Technology Raceway

Closest to the field: GT2 100.0% of GT2 Jordan Bupp, Daytona International Speedway Runoffs 2015 race · T2 87.8% of GT2 Kurt Rezzetano, Indianapolis Motor Speedway Runoffs 2021 race · FB 91.2% of GT2 J R Osborne, Sonoma Raceway Runoffs 2018 qualifying

% of GT2Lap times

GT2T2FBsolid race · dashed qualifying · slower is lower

GT2T2FBsolid 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

	Event	GT2			T2					FB
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs GT2	% of GT2	Qual best	Race best	Trap	vs GT2	% of GT2
	Road America Runoffs 20262026-09-28	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%)	2:23.977Scotty B White · fastest of 22 · top 5 within 2.5s+0.626s (+0.44%)	2:23.141Scotty B White · fastest of 18 · top 5 within 2.7s-0.342s (-0.24%)	147.2Ami Wilson-6.9 mph (-4.5%)	+12.491squal +14.343s	109.6%qual 111.1%
39 rule changes (GT2: 13, T2: 26)10 weight · 7 cars added · 4 induction · 3 suspension & brakes · 3 tyres & wheels · 2 aero · 2 engine · 1 removed · 7 othershowhide 2026-09-01 T2 TCR Data Points - BoP #40508weight +300 lbs 2026-07-01 T2 2023 TCR Hyundais #40278cars added 2026-06-01 T2 2015+ Ecoboost Mustang #40005weight -100 lbs 2026-06-01 T2 C6 Corvette - All Body Trims Requested #40174aero 2026-06-01 T2 T2-TCR Table Mazda 3 #40209tyres & wheels 2026-05-01 GT2 Panoz Esperante GTS Letter ID Number: #38494 - Additional Info #38584tyres & wheels 2026-05-01 GT2 Appendix L Update #39923tyres & wheels 2026-05-01 GT2 GT2 Porsche 997.2 GT3 Cup EDIT #40125other 2026-04-01 GT2 Corvette C7 (14-19) L76 Specline Errors/Missing Changes #39838weight -100 lbs 2026-04-01 GT2 GT2 Porsche 997.2 GT3 Cup #39936weight 2026-04-01 T2 14-17 BMW 435i Brake Approval Request #39910suspension & brakes 2026-04-01 T2 Porsche Cayman S Spec Lines Needed for Atlanta HST #39947engine 2026-04-01 T2 Please address loopholes in T2 TCR #40002weight 2026-03-01 GT2 Classification Request - Ginetta G56 GT4 (V8) #39625cars added 2026-03-01 GT2 Remove GT3U from GCR as it is now in STU #39862removed 2026-03-01 GT2 Audi R8 GT4 remove spec line notes #39864other 2026-03-01 T2 BMW 240i Permitted Tune #39861other 2026-02-01 GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2 #39249engine 2026-02-01 GT2 Classify T1 BMW in GT2 #39408cars added 2026-02-01 T2 Request to Add 2014-2017 435i to T2 #38991cars added 2026-02-01 T2 Consideration for Nissan Z & NISMO Z to Touring 2 Class #39296cars added 2026-02-01 T2 Allow Alt Bushing Material in Toe Links #39607suspension & brakes 2026-02-01 T2 Request for Classification of MG6 TCR in T2-TCR Class #39702cars added 2026-01-01 GT2 Additional Body Options to Replace Older Stock Car Bodies #39086other 2026-01-01 GT2 GT3 Turbo to GT2? #39365induction 2026-01-01 GT2 Tech Bulletins for GT2 and GT2-ST #39537cars added -100 lbs 2026-01-01 T2 Alternate Placement of Fuse Panel and Electronics Request #39370other 2026-01-01 T2 Rebalance Blackwing Cadillac T2 for 2026 #39426weight -50 lbs 2026-01-01 T2 C6 LS2 Corvette Parity Request #39472induction 2026-01-01 T2 T2 Tire Sizing #39490weight -25 lbs 2026-01-01 T2 Rear Spoiler for Mustang GT S550 (15-23) #39499aero 2026-01-01 T2 Clarify T4 Brake Rotor Allowance #39503suspension & brakes 2025-12-01 T2 Help the 2011-2014 s197Mustang GT and Boss302 Less Restriction #38523induction 2025-12-01 T2 Improving Competitiveness of Gen 5 Camaro SS #39021weight -50 lbs 2025-12-01 T2 Adjust T2 Darkhorse R #39346weight 2025-11-01 T2 ND Gearset Request for T4 #39166other 2025-11-01 T2 ND Spec Lines Wrong PT#'s #39170weight 2025-11-01 T2 Touring 2 Post-Runoffs BOP Adjustments and Changes #39274induction -50 lbs 2025-11-01 T2 Adjust rev limit on Spec Corvette in T2 #39282other
	Road America Runoffs 20252025-09-29	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%)	2:23.351Kurt Rezzetano · fastest of 11 · top 5 within 3.1s+1.234s (+0.87%)	2:23.483Kurt Rezzetano · fastest of 10 · top 5 within 2.9s+0.222s (+0.15%)	154.1John Heinricy+4.8 mph (+3.2%)	+10.036squal +11.544s	107.5%qual 108.8%
36 rule changes (GT2: 7, T2: 29)7 induction · 5 cars added · 5 tyres & wheels · 5 weight · 3 aero · 3 engine · 3 suspension & brakes · 2 removed · 1 wording · 2 othershowhide 2025-08-01 GT2 Rear Deck Lid for Older Air-Cooled Porsche #38506aero 2025-08-01 T2 Incorrect Touring Heading #38451wording 2025-08-01 T2 Clarifications needed to BMW M2 CS cup line #38536tyres & wheels 2025-08-01 T2 Fix brake allowance supersessions. #38554suspension & brakes 2025-08-01 T2 C5 Corvette correction #38782induction 2025-05-01 T2 C6 T-2 Corvette 6 Liter Engine Restrictor #37490induction 2025-05-01 T2 370Z Mid link Replacement for True Coil Overs and OEM Wheel Size #38014tyres & wheels 2025-05-01 T2 T2 Cadillac tire #38210tyres & wheels 2025-04-01 T2 Please class the Darkhorse R in T2 #37295cars added 2025-04-01 T2 T2 350Z Spec Line Cleanup #37603weight 2025-03-01 GT2 Hood Bulge allowed #37000engine 2025-03-01 GT2 OEM Wing Adjustment #37590aero 2025-03-01 T2 T2 BOP #37312induction 2025-02-01 GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty #36538weight 2025-02-01 T2 Mustang Update backdate #37275removed 2025-02-01 T2 BOP Adjustment for 2016 - Camaro SS/1LE #37434weight +100 lbs 2025-02-01 T2 BMW M235iR TCS CHANGE REQUEST #37470other 2025-02-01 T2 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added 2025-01-01 GT2 Panoz Esperante GTS BOP #36686cars added 2025-01-01 GT2 Correct language regarding OEM Areo Devices #37137aero 2025-01-01 GT2 GT2 Sunbeam Tiger Alternate Carburetor #37198induction 2025-01-01 T2 Remove spec lines that have expired #37269induction 2025-01-01 T2 BoP for the Various Mustangs #37185weight -50 lbs 2025-01-01 T2 Spec Corvette Line Clarification. #37441weight 2024-12-01 T2 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes 2024-12-01 T2 Request Less Restriction for Ls-3 Engined C6 Corvette #36810induction 2024-12-01 T2 Fuel Emissions Components #37076engine 2024-12-01 T2 fix brake wording #37129suspension & brakes 2024-12-01 T2 Evaporative emissions systems #37130engine 2024-12-01 T2 Move Spec Boxster to T4 #37158cars added 2024-12-01 T2 Corvette Wheels #37169tyres & wheels 2024-12-01 T2 BMW 320i Spec Line #37204other 2024-12-01 T2 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added 2024-12-01 T2 Please Consider Allowing Update to the C5 Corvette #37298induction 2024-12-01 T2 Major error in lane, but nobody ran it. #37302removed 2024-11-01 T2 Spec Corvette Change for T2 #37127tyres & wheels
	Road America Runoffs 20242024-10-01	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%)	2:22.117Kurt Rezzetano · fastest of 8 · top 5 within 2.7s-2.078s (-1.44%)	2:23.261Kurt Rezzetano · fastest of 7 · top 5 within 3.0s-3.542s (-2.41%)	149.3Scotty B White+2.0 mph (+1.3%)	+9.950squal +10.257s	107.5%qual 107.8%
44 rule changes (GT2: 13, T2: 31)13 weight · 7 suspension & brakes · 5 induction · 3 cars added · 3 engine · 3 tyres & wheels · 1 aero · 3 wording · 6 othershowhide 2024-08-01 T2 Errors #36214induction -75 lbs 2024-08-01 T2 Subaru Appeal #36258other 2024-08-01 T2 S550 Brakes #36571suspension & brakes 2024-07-01 GT2 GT2-ST Rule Clarification #36093wording 2024-07-01 GT2 GT4 cars may run in GT2-ST #36235weight 2024-07-01 T2 Mustang T2/T3 #35877other 2024-07-01 T2 S550 Brakes #35926suspension & brakes 2024-07-01 T2 T2-T4 Driveshaft Mistake...? #36050weight 2024-07-01 T2 request for allowance of 6 piston calipers for T2 C5 corvettes #36126other 2024-07-01 T2 B8/8.5 Audi S4 T3 and T2 #36195cars added 2024-05-01 GT2 Request for Spec Line 1010 Reconsideration #35009weight +300 lbs 2024-05-01 GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2 #35878induction 2024-05-01 T2 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine 2024-05-01 T2 Competition Adjustment Request/Wheel Size of E46 #35895tyres & wheels 2024-05-01 T2 Driveshafts #35916weight 2024-04-01 T2 Brake Request for 2009 Porsche Cayman #35723suspension & brakes 2024-03-01 GT2 Classify Corvette C8 (2020- ) into GT2/ST #33759cars added 2024-03-01 GT2 Requesting classification for a 2015 Mitjet ST in GT2 #35408cars added 2024-03-01 T2 Reorganize Spec Lines #35375induction 2024-03-01 T2 370Z Brake Rotor Size Correction #35487suspension & brakes 2024-03-01 T2 Letter #35154 2018+ Mustang GT Expansion #35488suspension & brakes 2024-02-01 GT2 Rear Blade Spoiler Clarification #35261aero 2024-02-01 GT2 GT Direct Injection allowance and rules #35437engine 2024-02-01 GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB #35385weight -150 lbs 2024-02-01 GT2 GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine 2024-02-01 T2 2015+ Mustang Sway Bar and A-Arm Request #35154suspension & brakes 2024-02-01 T2 Brake Kits #35245suspension & brakes 2024-02-01 T2 Runoffs wording on Caddy in T2 #35377wording 2024-02-01 T2 More Car Lightening Stuff #35319weight 2024-02-01 T2 Inclusion of B-C spec cars in T4 #35374other 2024-02-01 T2 T2-T4 Set expiration dates on spec lines #35378induction 2024-02-01 T2 Reply to letter #35161 and #31661 #35384weight +75 lbs 2024-01-01 GT2 Dodge Viper Gen 3 hybrid Kit Update Request #35200induction 2024-01-01 T2 Rebalance Blackwing Cadillac T2 #35079tyres & wheels 2024-01-01 T2 M2 CS RACING #35130weight -50 lbs 2024-01-01 T2 Spec Corvette in T2 #35139weight -175 lbs 2024-01-01 T2 T2 Viper BoP #35155tyres & wheels 2024-01-01 T2 BOP Adjustment for 5.0L Mustangs #35156weight +75 lbs 2024-01-01 T2 Take at Look at T-2 BOP #35161weight -50 lbs 2024-01-01 T2 C5 Corvette Spec Line Oversight #35169weight 2024-01-01 T2 Requested Update of Model Years of 370Z #35231other 2023-12-01 GT2 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight 2023-12-01 T2 M2 CS RACING #35122other 2023-10-01 GT2 Late E & O #34966wording
	Virginia International Raceway Runoffs 20232023-09-23	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%)	1:59.504Kurt Rezzetano · fastest of 13 · top 5 within 2.1s-0.772s (-0.64%)	2:01.201Kurt Rezzetano · fastest of 13 · top 5 within 1.6s-3.555s (-2.85%)	150.7Scotty B White-1.9 mph (-1.2%)	+8.336squal +7.500s	107.4%qual 106.7%
36 rule changes (GT2: 19, T2: 17)9 induction · 8 weight · 4 suspension & brakes · 3 engine · 3 tyres & wheels · 2 aero · 2 cars added · 1 wording · 4 othershowhide 2023-09-01 GT2 GT2 Mazda 20B 3 rotor ENO #34765weight -220 lbs 2023-08-01 T2 Corvette LS2 Restrictor Plate Adjustment #34456induction 2023-08-01 T2 Blacking Cadillac Fuel Capacity #34624engine 2023-08-01 T2 Rules Clarification for Mazda RX8 Spec Line #34395weight 2023-08-01 T2 rule book corrections #34437wording 2023-08-01 T2 Ride Height Correction for the T3 Solstice. #34615suspension & brakes 2023-07-01 GT2 appendix letter #33635 #34206weight 2023-07-01 GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body #34342weight 2023-07-01 T2 370Z Obsolete Parts & NISMO Alternatives to SPL Parts #34297weight 2023-06-01 T2 2009 Porsche Cayman Classing Request #34147other 2023-05-01 GT2 Request to class 2011 Porsche Cayman S #33771cars added 2023-05-01 GT2 Please classify Fields Cardinal V8 #33784cars added 2023-05-01 T2 C5 Z06 Straight Line Speed #33575weight 2023-04-01 GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class #33825engine 2023-04-01 T2 Allowance of any nonmetallic bushing material in T2 #33833suspension & brakes 2023-04-01 T2 Allow Adjustable stabilizer bar links #33861suspension & brakes 2023-03-01 T2 Honda Civic Type R Tire Size Increase #33672tyres & wheels 2023-02-01 GT2 GT2 Mazda 13B Turbo #33729induction 2023-02-01 T2 C5 Corvette Swaybars #33269other 2023-02-01 T2 Mustang OEM Grill Request #33333other 2023-01-01 GT2 Request Permission to Use a Substitute Turbo #33337induction 2023-01-01 GT2 Request to Reduce Restriction on C7 GT2 Corvette #33342induction 2023-01-01 GT2 Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415engine 2023-01-01 GT2 GT2 Mazda 13b turbocharger part # update #33437induction 2023-01-01 GT2 GT2-ST BMW E36/46 spec line remove #33610aero 2023-01-01 GT2 GT3 Choke option effective 1-01-2023 #33669induction 2023-01-01 GT2 GT3 2.0L choke/weight option #33670weight 2023-01-01 GT2 BOP adjustment for GT2 & GT2-ST #33681induction 2023-01-01 T2 BMW M235iR/M240iR Aftermarket 2WNR Shocks Allowed - Touring 2 #33464suspension & brakes -50 lbs 2023-01-01 T2 Touring (T2-T5) Category #33617tyres & wheels 2023-01-01 T2 ENO 9.1.9.2.D.1.e.1.a. #33651other 2022-12-01 GT2 GT2 (TA2)/GTA Part Number Update #33315induction 2022-12-01 GT2 Ginetta G56 GTA - Optional Wheels #33357tyres & wheels 2022-12-01 T2 Heavy Cars #33345weight +125 lbs 2022-11-01 GT2 Allow the MAShaw Body Kit on the GT2/ST Spec Line for BMW E36/E46 #32447aero 2022-10-01 GT2 Request for C5/C6 Corvette Restrictor Size Review #32982induction
	Virginia International Raceway Runoffs 20222022-09-24	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%)	2:00.276Kurt Rezzetano · fastest of 14 · top 5 within 1.7s+2.739s (+2.33%)	2:04.756Kurt Rezzetano · fastest of 14 · top 5 within 2.0s+6.205s (+5.23%)	152.5Aaron Kaplan+3.2 mph (+2.1%)	+11.708squal +9.190s	110.4%qual 108.3%
34 rule changes (GT2: 14, T2: 20)10 cars added · 7 suspension & brakes · 4 induction · 4 weight · 1 engine · 1 tyres & wheels · 3 wording · 4 othershowhide 2022-09-01 GT2 Tail lights on all GT category race cars. #32799suspension & brakes 2022-09-01 GT2 Addendum to letter #32514 Ginetta GTA G56 #33076cars added 2022-08-01 GT2 Information requested for carbon roofs on BMW E36/E46 cars in GT2 #32682wording 2022-08-01 GT2 Request to Allow the 95mm S54 BMW Crankshaft in GT2-ST #32698other 2022-08-01 GT2 Request to classify Audi R8 FIA GT4 to GT2 #32805cars added 2022-06-01 T2 BMW M235iR/M240iR Min Weight Clarification #32430weight 2022-06-01 T2 Follow up to Letter 30888 #32477other 2022-05-01 GT2 Typo in rules for shocks #32308suspension & brakes 2022-05-01 GT2 additional response to letters #31898 & 32083 #32424weight +140 lbs 2022-05-01 T2 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes 2022-05-01 T2 Request BoP E92 torque #32456other 2022-05-01 T2 Classify Cadillac Blackwing #32535cars added 2022-04-01 T2 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine 2022-04-01 T2 BMW M2 CS Cup 2020- Exhaust #32243tyres & wheels 2022-04-01 T2 RequestT2 classification- 2022 Cadillac CT4-V Blackwing #32263cars added 2022-03-01 GT2 Request to Classify Ginetta G40 in GT2 #31597cars added 2022-03-01 GT2 2021 Supra GR GT4 #31737cars added 2022-03-01 GT2 Proposed Technical Bulletin #31900induction 2022-03-01 T2 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes 2022-03-01 T2 C6 Restrictor Help #31995induction 2022-02-01 GT2 GT2/ST Porsche Cayman #31451 correct TBR size error #31991wording 2022-02-01 T2 BMW Z4M Adjustment #31885weight -50 lbs 2022-01-01 GT2 Restrictor Clarification for 2015 Cayman #31451induction 2022-01-01 T2 Touring 2 BOP adjustments for 2022 #31480weight -50 lbs 2022-01-01 T2 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes 2022-01-01 T2 Request to clarify radiator hoses #31682wording 2022-01-01 T2 Clarify Permitted/Allowed #31743suspension & brakes 2022-01-01 T2 SMG #31837other 2021-12-01 T2 Typo for BMW M2 CS Cup 2020 #31173suspension & brakes 2021-11-01 T2 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added 2021-11-01 T2 Request new car 2017 BMW M2 #30486cars added 2021-11-01 T2 Request to Classify Porsche 997.2 GTS in T2 (body not = to C2S) #30686cars added 2021-10-01 GT2 Turbo Request for 13B Engine #30656induction 2021-10-01 GT2 Request car classification #31032cars added
	Indianapolis Motor Speedway Runoffs 20212021-09-25	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	1:47.509Kurt Rezzetano · fastest of 26 · top 5 within 1.6s-1.109s (-1.02%)	1:48.474Kurt Rezzetano · fastest of 26 · top 5 within 2.5s-0.295s (-0.27%)	151.5Scotty B. White	-15.039squal +7.844s	87.8%qual 107.9%
46 rule changes (GT2: 16, T2: 30)14 weight · 5 cars added · 5 engine · 3 suspension & brakes · 3 tyres & wheels · 1 induction · 2 wording · 13 othershowhide 2021-09-01 GT2 Correct letter 30565 GT2/ST #31088weight 2021-09-01 T2 BMW M2 CS Power Stick Part Number #31087wording 2021-08-01 GT2 Request the 04-06 Pontiac GTO WC Car Be Added to the GT2/ST Chart #30339cars added 2021-08-01 GT2 Request to Update GTA Obsolete Part Numbers #30615wording 2021-08-01 GT2 GTX class correction to GT2/ST #30973cars added 2021-08-01 T2 997.1 EO #30933other 2021-07-01 GT2 Porsche Cayman Engine Modification and Engine Request #30472engine 2021-07-01 GT2 Request weight clarification Viper CC #30565weight 2021-07-01 GT2 Variance, 2021 TA2 Rules vs GCR Appendix L #30641weight 2021-07-01 T2 Request #30406weight 2021-06-01 T2 Civic Type R Brake Rotors #29817suspension & brakes 2021-06-01 T2 Mustang S550 Parity in T2 #29925other 2021-06-01 T2 Request BOP on BMW Z4 T2 car #30597weight +50 lbs 2021-06-01 T2 E92 #30639weight -50 lbs 2021-05-01 T2 C5/6 Corvette in T1, T1-LP and T2 Dry Sump Standardization #29046other 2021-05-01 T2 Request for Chevrolet Camaro 1LE (2016-) Auto Trans #29067other 2021-05-01 T2 Request E46 M3 Minimum Competition Weight #29429weight -100 lbs 2021-05-01 T2 Request to add 2015 to Chevrolet Camaro SS/1LE 2010-2014 #29736other 2021-04-01 GT2 GT2 tiger firing order #30421engine 2021-04-01 T2 Request consistency review in GCR #30263other 2021-04-01 T2 Class Spec Corvette in T2? #30297cars added 2021-04-01 T2 E92 BMW Spring Rate Request #30391suspension & brakes 2021-04-01 T2 Please correct recent T2 Spec Line #30401suspension & brakes 2021-03-01 GT2 GT2-ST CORVETTE CHANGES #30029weight +100 lbs 2021-03-01 GT2 Request underfloor clarification #30121tyres & wheels 2021-03-01 GT2 29742 Change new wording to read as: #30329engine 2021-03-01 T2 Request BMW M2CS door glass removal #30254other 2021-02-01 GT2 ABS Restrictions #30064other 2021-02-01 GT2 RM 21-01 C6 & C7 clarification #30192weight 2021-02-01 T2 Request Addition of BMW M240iR #29503weight 2021-02-01 T2 2021 Toyota Supra #29567cars added 2021-02-01 T2 Request Cold Air Intake for Honda Civic Type R #29942induction 2021-02-01 T2 Adjust T2 spec line that was missed in T2 BOP #30055weight -50 lbs 2021-02-01 T2 Fix T2 Mustang spec line #30106other 2021-02-01 T2 Z4 Wheel Size #30113tyres & wheels 2021-02-01 T2 Clarify T2 Spec lines #30194tyres & wheels 2021-01-01 GT2 Request change to engine firing order rule #29742engine 2021-01-01 GT2 Request E-46 BMW M3 balance of performance #29833weight -100 lbs 2021-01-01 T2 Request to Classify BMW M2 CS #29523cars added 2021-01-01 T2 350Z Rear Caliper Replacement #29710other 2021-01-01 T2 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement #29860other 2021-01-01 T2 Cap year range on all 86s #29908other 2020-12-01 GT2 Request for Bigger Engine in Plymouth Breeze #29380engine 2020-12-01 T2 Request to Reevaluate T2 Spec Line for E92 M3 #28266weight -50 lbs 2020-12-01 T2 Request for Parity Among Vehicles Including S550 Mustang #29486weight -75 lbs 2020-12-01 T2 Alfa Romeo 4C Launch Edition #29531other
	Road America Runoffs 20202020-10-02	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	2:24.195Alan Kossof · fastest of 15 · top 5 within 2.5s	2:26.803Kurt Rezzetano · fastest of 14 · top 5 within 2.2s	147.3Mark Boden	+12.524squal +11.897s	109.3%qual 109.0%
56 rule changes (GT2: 26, T2: 30)15 weight · 7 suspension & brakes · 6 induction · 5 aero · 4 cars added · 4 engine · 1 tyres & wheels · 7 wording · 7 othershowhide 2020-10-01 GT2 rescind GT2 stock car bodies removal #29219other 2020-10-01 GT2 E&O Typos in Appendix L #29447wording 2020-10-01 GT2 GT2 wing width wording correction #29469aero 2020-10-01 T2 Request 2018+ mustang swaybar update #28659suspension & brakes 2020-09-01 GT2 GT Category Wording #29193induction 2020-09-01 GT2 Corvette GT2-ST intake manifold #29221induction 2020-09-01 GT2 997.2 E&O link to 27915 #29373other 2020-09-01 T2 Request to Clarify New 2-piece Brake Rotor Rule #29106suspension & brakes 2020-09-01 T2 please consider BoP for the following cars in T2 #29266weight -50 lbs 2020-09-01 T2 Request clarification on most recent approval by the Board #29284suspension & brakes 2020-08-01 GT2 Request for allowance Trans Am SGT #28951weight 2020-08-01 GT2 Omitted GT2 fender/hood openings #29171other 2020-08-01 T2 Request to correct GCR for 2018+ FORD Mustang GT & Ecoboost #28803wording 2020-07-01 GT2 TA2 Gurney flap wicker clarification #28874aero 2020-07-01 GT2 STO Gurney flap wicker clarification #28883aero 2020-07-01 GT2 GT Gurney flap wicker clarification #28909aero 2020-07-01 T2 Request to Add a Vehicle to the Roster (contd.) #27698other 2020-07-01 T2 Request brake upgrade and electric power steering pump #28946suspension & brakes 2020-06-01 GT2 Request to Adjust Weight of OEM 8.4 Viper #28739weight -50 lbs 2020-06-01 GT2 Request to Adjust Weight of OEM Chevrolet Corvette #28896weight -50 lbs 2020-06-01 T2 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added 2020-06-01 T2 Consider coil spring conversion Corvette in T2 #28824suspension & brakes 2020-05-01 GT2 Request Corvette engine parity #28576engine 2020-05-01 T2 Please Add the Following BBK to Allowed List for E92 M3 #28421wording 2020-05-01 T2 C5 Weight Adjustment #28433weight -50 lbs 2020-05-01 T2 Z3M Roadster Weight #28437weight 2020-04-01 GT2 Request to revisit Panoz GT-S BoP #28280engine 2020-04-01 GT2 GT2-ST Corvette LS2 & L76 #28583weight 2020-04-01 GT2 GT2-ST Corvette L76 #28584weight 2020-04-01 T2 Limit Changes to the 997.2 Porsche #28242aero 2020-04-01 T2 Correct T2 Mustang Transmission #28732wording 2020-03-01 GT2 Request 991.2 Porsche engine displacement verify typo #28194engine 2020-03-01 T2 Request to Readjust the T2 Porsches #27746induction 2020-02-01 GT2 Windshield Clips #27323other 2020-02-01 GT2 Request to Add Chevrolet SS Body to Appendix L #27898wording 2020-02-01 T2 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs 2020-02-01 T2 Request for Two Piece Stop Tech Brake Rotors #27582suspension & brakes 2020-02-01 T2 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added 2020-02-01 T2 Request for Alternative Brake Kit on Nissan 370Z #27912suspension & brakes 2020-02-01 T2 2015- Current Ecoboost Mustang #27971weight -100 lbs 2020-02-01 T2 T2 Mustang #28022tyres & wheels 2020-01-01 GT2 Request Factory Five Daytona coupe classification #26308cars added 2020-01-01 GT2 Porsche 991.2 GT3 Cup GT2 Classification #27701cars added 2020-01-01 GT2 Request for Acura NSX Spec Line Changes #27755weight 2020-01-01 GT2 GT2 991.1 restrictor size change #27914induction 2020-01-01 GT2 GT2 996/997.1 weight change #27915weight -100 lbs 2020-01-01 GT2 GT2/ST Corvette comp adjustment #27920induction 2020-01-01 T2 Clarification of On-Board Fire System for T2 #27183wording 2020-01-01 T2 Mustang Ecoboost and GT Transmission #27439other 2020-01-01 T2 Request for Dailey Engineering Dry Sump on 2010 Camaro SS #27514engine 2020-01-01 T2 Request for Half Shafts - 2014 Camaro SS 1LE #27584induction 2020-01-01 T2 Request for Parity Among Vehicles #27665weight -50 lbs 2020-01-01 T2 Request for 2016-2020 Camaro SS Help #27776weight -50 lbs 2020-01-01 T2 Request for Competitive Adjustments to Honda Civic Type R #27839weight -50 lbs 2020-01-01 T2 T4 RX8 Classification Error #27902wording 2020-01-01 T2 Request to add Toyota 86 GT to Spec Line #27910other
	Virginia International Raceway Runoffs 20192019-10-05	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	1:57.537Cooper I MacNeil · fastest of 19 · top 5 within 3.4s	1:58.551Cooper I MacNeil · fastest of 18 · top 5 within 2.4s	149.4James Leithauser	+6.076squal +7.355s	105.4%qual 106.7%	1:54.469Pete Frost · only car	1:57.688Pete Frost · only car	145.9Pete Frost	+5.213squal +4.287s	104.6%qual 103.9%
44 rule changes (GT2: 21, T2: 23)12 cars added · 12 weight · 8 suspension & brakes · 4 engine · 2 tyres & wheels · 1 induction · 2 wording · 3 othershowhide 2019-08-31 T2 Request spare tire/wheel clarification #27012tyres & wheels 2019-07-01 GT2 TA2 Weight Clarification #27077weight 2019-07-01 T2 Request to change Cadillac CTS-V years from 06-07 to 04-07 #26842cars added 2019-07-01 T2 Request to allow Hotchkiss front / rear sway bars on T2 CTS-V #26845suspension & brakes 2019-07-01 T2 Consider T2 06-07 Cadillac CTS-V BoP #27022induction 2019-07-01 T2 Correct T2 Mustang tire size #27024tyres & wheels 2019-05-31 GT2 Request to classify Toyota Supra with 3SGTE engine #25185cars added 2019-05-31 GT2 Request to Classify Acura NSX from T1 to GT2? #26121cars added 2019-05-31 GT2 Request for TA2 BOP in GT2 #26509weight 2019-05-31 T2 2018+ Audi TT RS Suspension Allowances #26631suspension & brakes 2019-05-31 T2 Request BOP adjustment for 2018 Honda Civic Type R-TIR removal #26882weight +150 lbs 2019-05-01 GT2 Request for e36/e46 bmw 4500 cc v8 at 2950lbs in GT2/ST #26106engine 2019-05-01 GT2 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine 2019-05-01 GT2 Request to Classify Ligier JS2 R #26535cars added 2019-04-01 GT2 Request Ford Perfomance 5.2L crate engine FPR clarification #26159engine 2019-04-01 GT2 Request Ride Height Clarification #26600suspension & brakes 2019-04-01 T2 Request for Removal of Rear Anti-roll Bar in T2 Mustang GT #26533suspension & brakes 2019-03-01 GT2 Request Porsche Cayman year classification #26241other 2019-03-01 GT2 GT2/ST Porsche Cayman engine #26250engine 2019-03-01 T2 Request Mustang GT Limited Prep 2018 Classification #24431cars added 2019-03-01 T2 Request to Classify 2018 Audi TT RS #25961cars added 2019-03-01 T2 Request for Adjustments on 2017+ Civic Type R #25969suspension & brakes 2019-03-01 T2 Correct Mazda MX-5 Hard Top Notes #26137weight 2019-03-01 T2 Consider opening class rules to allow any thermostat #26187wording 2019-03-01 T2 Ford Mustang Boss 302 (12-13) - correct weight #26287weight -50 lbs 2019-03-01 T2 Request camber correction 005-2013 corvette C6 #26288suspension & brakes 2019-03-01 T2 Request 98-02 Firebird 98-02 Camaro reloacte rear spring #26291suspension & brakes 2019-03-01 T2 Cap 2016 Mazda Miata year at 2018 #26388other 2019-03-01 T2 Class Ford Mustang GT 2018+ (reference letter 24431) #26400cars added 2019-01-01 GT2 ST/GT2 BMW Flossman Kit Clarification #22138wording 2019-01-01 GT2 Request Clarification/Revision of Appendix L (2013 TA2 Rules) #25110weight 2019-01-01 GT2 Request to classify BMW E82 (1 series) into GT2 #25539cars added 2019-01-01 GT2 2010 Cayman Street Tuner Into an STO Car,Addendum #25545weight 2019-01-01 GT2 Request - Classify Ford Performance 5.2l #25716cars added 2019-01-01 GT2 Add missing displacement, minimum weight. Remove #25765weight 2019-01-01 GT2 Request for Ford FP 350s Weight Reduction #25806weight 2019-01-01 GT2 Request to Classify EcoBoost Mustang #25842cars added 2019-01-01 GT2 Request to Remove Mazda RX 7 Body Work Penalty #26024weight 2019-01-01 GT2 GTX Homologation table update #26034cars added 2019-01-01 T2 Errors, Omissions, and Updates (Various) #22414weight 2019-01-01 T2 Request to classify 2015 Cayman GTS 3.4L in T2 #25335cars added 2019-01-01 T2 Request for 2017-2018 Honda Civic Type R - 4 BOP Grill #25513other 2019-01-01 T2 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight 2019-01-01 T2 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes
	Sonoma Raceway Runoffs 20182018-10-10	1:37.203Andrew Aquilante · fastest of 22 · top 5 within 2.1s	1:38.524R Spencer Trenery · fastest of 19 · top 5 within 1.3s	133.8Michael McAleenan	1:45.032John Kachadurian · fastest of 30 · top 5 within 2.4s	1:45.999John Kachadurian · fastest of 28 · top 5 within 3.0s	106.5John Kachadurian	+7.475squal +7.829s	107.6%qual 108.1%	1:28.612J R Osborne · fastest of 7 · top 5 within 3.3s	1:31.189J R Osborne · fastest of 7 · top 5 within 3.7s	140.5J R Osborne	-7.335squal -8.591s	92.6%qual 91.2%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:39.919Andrew Aquilante · fastest of 36 · top 5 within 2.9s	1:40.976Andrew Aquilante · fastest of 35 · top 5 within 2.6s		1:48.618John M Buttermore · fastest of 26 · top 5 within 0.8s	1:48.769John M Buttermore · fastest of 25 · top 5 within 1.2s		+7.793squal +8.699s	107.7%qual 108.7%	1:33.746Gary Hickman · fastest of 18 · top 5 within 3.3s	1:33.702Alex Mayer · fastest of 17 · top 5 within 3.0s		-7.274squal -6.173s	92.8%qual 93.8%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:25.405Andrew Aquilante · fastest of 21 · top 5 within 2.8s	1:26.847Andrew Aquilante · fastest of 19 · top 5 within 1.5s		1:31.563Preston Calvert · fastest of 22 · top 5 within 0.5s	1:32.691John M Buttermore · fastest of 20 · top 5 within 1.5s		+5.844squal +6.158s	106.7%qual 107.2%	1:19.886Alex Mayer · fastest of 10 · top 5 within 1.5s	1:21.015Jeremy Hill · fastest of 10 · top 5 within 1.2s		-5.832squal -5.519s	93.3%qual 93.5%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	1:53.652Jordan Bupp · fastest of 27 · top 5 within 1.2s	1:53.543Jordan Bupp · fastest of 22 · top 5 within 1.7s		2:00.172Kurt Rezzetano · fastest of 20 · top 5 within 3.2s	2:01.077Kurt Rezzetano · fastest of 19 · top 5 within 2.8s		+7.534squal +6.520s	106.6%qual 105.7%	1:50.711J R Osborne · fastest of 20 · top 5 within 1.1s	1:51.616J R Osborne · fastest of 19 · top 5 within 2.1s		-1.927squal -2.941s	98.3%qual 97.4%

By track

Track	Events	Typical % of GT2	Best	Latest
Road America	4	100.0%	100.0%Runoffs 2020	100.0%Runoffs 2026
Virginia International Raceway	3	100.0%	100.0%Runoffs 2019	100.0%Runoffs 2023
Indianapolis Motor Speedway	2	100.0%	100.0%Runoffs 2017	100.0%Runoffs 2021
Daytona International Speedway	1	100.0%	100.0%Runoffs 2015	100.0%Runoffs 2015
Mid-Ohio Sports Car Course	1	100.0%	100.0%Runoffs 2016	100.0%Runoffs 2016
Sonoma Raceway	1	100.0%	100.0%Runoffs 2018	100.0%Runoffs 2018

About this data

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 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.