Road America Runoffs 2026 2026-09-28 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%) 16 rule changes (ITR: 3 , GT2: 13 ) 4 weight · 3 cars added · 2 induction · 2 tyres & wheels · 1 engine · 1 removed · 3 other show hide 2026-05-01 GT2 Panoz Esperante GTS Letter ID Number: #38494 - Additional Info #38584 tyres & wheels 2026-05-01 GT2 Appendix L Update #39923 tyres & wheels 2026-05-01 GT2 GT2 Porsche 997.2 GT3 Cup EDIT #40125 other 2026-04-01 GT2 Corvette C7 (14-19) L76 Specline Errors/Missing Changes #39838 weight -100 lbs 2026-04-01 GT2 GT2 Porsche 997.2 GT3 Cup #39936 weight 2026-03-01 GT2 Classification Request - Ginetta G56 GT4 (V8) #39625 cars added 2026-03-01 GT2 Remove GT3U from GCR as it is now in STU #39862 removed 2026-03-01 GT2 Audi R8 GT4 remove spec line notes #39864 other 2026-02-01 GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2 #39249 engine 2026-02-01 GT2 Classify T1 BMW in GT2 #39408 cars added 2026-02-01 ITR E&O: Turbo Cars in IT #39691 induction 2026-01-01 GT2 Additional Body Options to Replace Older Stock Car Bodies #39086 other 2026-01-01 GT2 GT3 Turbo to GT2? #39365 induction 2026-01-01 GT2 Tech Bulletins for GT2 and GT2-ST #39537 cars added -100 lbs 2026-01-01 ITR Correct Response to Letter 38971 in October Tech Bulletin #39105 weight 2025-10-01 ITR NASA Spec3 to ITR #38971 weight
Road America Runoffs 2025 2025-09-29 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%) 8 rule changes (ITR: 1 , GT2: 7 ) 3 aero · 1 cars added · 1 engine · 1 induction · 1 weight · 1 other show hide 2025-08-01 GT2 Rear Deck Lid for Older Air-Cooled Porsche #38506 aero 2025-03-01 GT2 Hood Bulge allowed #37000 engine 2025-03-01 GT2 OEM Wing Adjustment #37590 aero 2025-02-01 GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty #36538 weight 2025-02-01 ITR Combine RX8 Spec Lines in ITR #37383 other 2025-01-01 GT2 Panoz Esperante GTS BOP #36686 cars added 2025-01-01 GT2 Correct language regarding OEM Areo Devices #37137 aero 2025-01-01 GT2 GT2 Sunbeam Tiger Alternate Carburetor #37198 induction
Road America Runoffs 2024 2024-10-01 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%) 18 rule changes (ITR: 5 , GT2: 13 ) 6 weight · 4 cars added · 3 induction · 2 engine · 1 aero · 2 wording show hide 2024-07-01 GT2 GT2-ST Rule Clarification #36093 wording 2024-07-01 GT2 GT4 cars may run in GT2-ST #36235 weight 2024-05-01 GT2 Request for Spec Line 1010 Reconsideration #35009 weight +300 lbs 2024-05-01 GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2 #35878 induction 2024-04-01 ITR Battery Change #35854 weight 2024-03-01 GT2 Classify Corvette C8 (2020- ) into GT2/ST #33759 cars added 2024-03-01 GT2 Requesting classification for a 2015 Mitjet ST in GT2 #35408 cars added 2024-02-01 GT2 Rear Blade Spoiler Clarification #35261 aero 2024-02-01 GT2 GT Direct Injection allowance and rules #35437 engine 2024-02-01 GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB #35385 weight -150 lbs 2024-02-01 GT2 GT2/3 remove Direction Injection not allowed in Spec line notes #35439 engine 2024-01-01 GT2 Dodge Viper Gen 3 hybrid Kit Update Request #35200 induction 2024-01-01 ITR Request to classify BMW 325XIT #33889 cars added 2024-01-01 ITR car classification #35263 cars added 2024-01-01 ITR ADJUST WEIGHTS ON ITR CARS #35334 weight -122 lbs 2023-12-01 GT2 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453 weight 2023-11-01 ITR TIR for Turbo cars in TIR #33856 induction 2023-10-01 GT2 Late E & O #34966 wording
Virginia International Raceway Runoffs 2023 2023-09-23 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%) 19 rule changes (GT2: 19 )8 induction · 4 weight · 2 aero · 2 cars added · 2 engine · 1 tyres & wheels show hide 2023-09-01 GT2 GT2 Mazda 20B 3 rotor ENO #34765 weight -220 lbs 2023-07-01 GT2 appendix letter #33635 #34206 weight 2023-07-01 GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body #34342 weight 2023-05-01 GT2 Request to class 2011 Porsche Cayman S #33771 cars added 2023-05-01 GT2 Please classify Fields Cardinal V8 #33784 cars added 2023-04-01 GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class #33825 engine 2023-02-01 GT2 GT2 Mazda 13B Turbo #33729 induction 2023-01-01 GT2 Request Permission to Use a Substitute Turbo #33337 induction 2023-01-01 GT2 Request to Reduce Restriction on C7 GT2 Corvette #33342 induction 2023-01-01 GT2 Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415 engine 2023-01-01 GT2 GT2 Mazda 13b turbocharger part # update #33437 induction 2023-01-01 GT2 GT2-ST BMW E36/46 spec line remove #33610 aero 2023-01-01 GT2 GT3 Choke option effective 1-01-2023 #33669 induction 2023-01-01 GT2 GT3 2.0L choke/weight option #33670 weight 2023-01-01 GT2 BOP adjustment for GT2 & GT2-ST #33681 induction 2022-12-01 GT2 GT2 (TA2)/GTA Part Number Update #33315 induction 2022-12-01 GT2 Ginetta G56 GTA - Optional Wheels #33357 tyres & wheels 2022-11-01 GT2 Allow the MAShaw Body Kit on the GT2/ST Spec Line for BMW E36/E46 #32447 aero 2022-10-01 GT2 Request for C5/C6 Corvette Restrictor Size Review #32982 induction
Virginia International Raceway Runoffs 2022 2022-09-24 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%) 16 rule changes (ITR: 2 , GT2: 14 ) 6 cars added · 4 induction · 2 suspension & brakes · 1 weight · 2 wording · 1 other show hide 2022-09-01 GT2 Tail lights on all GT category race cars. #32799 suspension & brakes 2022-09-01 GT2 Addendum to letter #32514 Ginetta GTA G56 #33076 cars added 2022-08-01 GT2 Information requested for carbon roofs on BMW E36/E46 cars in GT2 #32682 wording 2022-08-01 GT2 Request to Allow the 95mm S54 BMW Crankshaft in GT2-ST #32698 other 2022-08-01 GT2 Request to classify Audi R8 FIA GT4 to GT2 #32805 cars added 2022-05-01 GT2 Typo in rules for shocks #32308 suspension & brakes 2022-05-01 GT2 additional response to letters #31898 & 32083 #32424 weight +140 lbs 2022-03-01 GT2 Request to Classify Ginetta G40 in GT2 #31597 cars added 2022-03-01 GT2 2021 Supra GR GT4 #31737 cars added 2022-03-01 GT2 Proposed Technical Bulletin #31900 induction 2022-03-01 ITR Request to classify 93 Talon TSI AWD #31727 cars added 2022-02-01 GT2 GT2/ST Porsche Cayman #31451 correct TBR size error #31991 wording 2022-01-01 GT2 Restrictor Clarification for 2015 Cayman #31451 induction 2021-10-01 GT2 Turbo Request for 13B Engine #30656 induction 2021-10-01 GT2 Request car classification #31032 cars added 2021-10-01 ITR Class Turbo Cars #29774 induction
Indianapolis Motor Speedway Runoffs 2021 2021-09-25 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 17 rule changes (ITR: 1 , GT2: 16 ) 6 weight · 5 engine · 3 cars added · 1 tyres & wheels · 1 wording · 1 other show hide 2021-09-01 GT2 Correct letter 30565 GT2/ST #31088 weight 2021-08-01 GT2 Request the 04-06 Pontiac GTO WC Car Be Added to the GT2/ST Chart #30339 cars added 2021-08-01 GT2 Request to Update GTA Obsolete Part Numbers #30615 wording 2021-08-01 GT2 GTX class correction to GT2/ST #30973 cars added 2021-07-01 GT2 Porsche Cayman Engine Modification and Engine Request #30472 engine 2021-07-01 GT2 Request weight clarification Viper CC #30565 weight 2021-07-01 GT2 Variance, 2021 TA2 Rules vs GCR Appendix L #30641 weight 2021-04-01 GT2 GT2 tiger firing order #30421 engine 2021-03-01 GT2 GT2-ST CORVETTE CHANGES #30029 weight +100 lbs 2021-03-01 GT2 Request underfloor clarification #30121 tyres & wheels 2021-03-01 GT2 29742 Change new wording to read as: #30329 engine 2021-02-01 GT2 ABS Restrictions #30064 other 2021-02-01 GT2 RM 21-01 C6 & C7 clarification #30192 weight 2021-01-01 GT2 Request change to engine firing order rule #29742 engine 2021-01-01 GT2 Request E-46 BMW M3 balance of performance #29833 weight -100 lbs 2020-12-01 GT2 Request for Bigger Engine in Plymouth Breeze #29380 engine 2020-12-01 ITR Request to classify a 2003 Honda Accord #28898 cars added
Road America Runoffs 2020 2020-10-02 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 27 rule changes (ITR: 1 , GT2: 26 ) 7 weight · 4 aero · 4 induction · 3 engine · 2 cars added · 1 tyres & wheels · 2 wording · 4 other show hide 2020-10-01 GT2 rescind GT2 stock car bodies removal #29219 other 2020-10-01 GT2 E&O Typos in Appendix L #29447 wording 2020-10-01 GT2 GT2 wing width wording correction #29469 aero 2020-09-01 GT2 GT Category Wording #29193 induction 2020-09-01 GT2 Corvette GT2-ST intake manifold #29221 induction 2020-09-01 GT2 997.2 E&O link to 27915 #29373 other 2020-08-01 GT2 Request for allowance Trans Am SGT #28951 weight 2020-08-01 GT2 Omitted GT2 fender/hood openings #29171 other 2020-07-01 GT2 TA2 Gurney flap wicker clarification #28874 aero 2020-07-01 GT2 STO Gurney flap wicker clarification #28883 aero 2020-07-01 GT2 GT Gurney flap wicker clarification #28909 aero 2020-06-01 GT2 Request to Adjust Weight of OEM 8.4 Viper #28739 weight -50 lbs 2020-06-01 GT2 Request to Adjust Weight of OEM Chevrolet Corvette #28896 weight -50 lbs 2020-05-01 GT2 Request Corvette engine parity #28576 engine 2020-05-01 ITR Cleanup 4.f Traction control #28609 tyres & wheels 2020-04-01 GT2 Request to revisit Panoz GT-S BoP #28280 engine 2020-04-01 GT2 GT2-ST Corvette LS2 & L76 #28583 weight 2020-04-01 GT2 GT2-ST Corvette L76 #28584 weight 2020-03-01 GT2 Request 991.2 Porsche engine displacement verify typo #28194 engine 2020-02-01 GT2 Windshield Clips #27323 other 2020-02-01 GT2 Request to Add Chevrolet SS Body to Appendix L #27898 wording 2020-01-01 GT2 Request Factory Five Daytona coupe classification #26308 cars added 2020-01-01 GT2 Porsche 991.2 GT3 Cup GT2 Classification #27701 cars added 2020-01-01 GT2 Request for Acura NSX Spec Line Changes #27755 weight 2020-01-01 GT2 GT2 991.1 restrictor size change #27914 induction 2020-01-01 GT2 GT2 996/997.1 weight change #27915 weight -100 lbs 2020-01-01 GT2 GT2/ST Corvette comp adjustment #27920 induction
Virginia International Raceway Runoffs 2019 2019-10-05 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 26 rule changes (ITR: 5 , GT2: 21 ) 9 cars added · 9 weight · 4 engine · 1 induction · 1 suspension & brakes · 1 wording · 1 other show hide 2019-08-31 ITR Request to Classify 2008-2013 BMW 128i #26724 cars added 2019-08-31 ITR Request clarification 1999 Ford Escort ZX2 S?R #26966 weight -45 lbs 2019-08-31 ITR Please Classify the '13-'14 Subaru BRZ/ Scion FRS in IT #27242 cars added 2019-07-01 GT2 TA2 Weight Clarification #27077 weight 2019-05-31 GT2 Request to classify Toyota Supra with 3SGTE engine #25185 cars added 2019-05-31 GT2 Request to Classify Acura NSX from T1 to GT2? #26121 cars added 2019-05-31 GT2 Request for TA2 BOP in GT2 #26509 weight 2019-05-01 GT2 Request for e36/e46 bmw 4500 cc v8 at 2950lbs in GT2/ST #26106 engine 2019-05-01 GT2 Request GTX Fuel injection for previous GT-1 tube frame cars #26141 engine 2019-05-01 GT2 Request to Classify Ligier JS2 R #26535 cars added 2019-05-01 ITR Request Reduction of Minimum weight for 2000-2003 Honda S2000 #26096 weight +20 lbs 2019-05-01 ITR Request clarification on 9.1.3 D1.A.2 #26237 induction 2019-04-01 GT2 Request Ford Perfomance 5.2L crate engine FPR clarification #26159 engine 2019-04-01 GT2 Request Ride Height Clarification #26600 suspension & brakes 2019-03-01 GT2 Request Porsche Cayman year classification #26241 other 2019-03-01 GT2 GT2/ST Porsche Cayman engine #26250 engine 2019-01-01 GT2 ST/GT2 BMW Flossman Kit Clarification #22138 wording 2019-01-01 GT2 Request Clarification/Revision of Appendix L (2013 TA2 Rules) #25110 weight 2019-01-01 GT2 Request to classify BMW E82 (1 series) into GT2 #25539 cars added 2019-01-01 GT2 2010 Cayman Street Tuner Into an STO Car,Addendum #25545 weight 2019-01-01 GT2 Request - Classify Ford Performance 5.2l #25716 cars added 2019-01-01 GT2 Add missing displacement, minimum weight. Remove #25765 weight 2019-01-01 GT2 Request for Ford FP 350s Weight Reduction #25806 weight 2019-01-01 GT2 Request to Classify EcoBoost Mustang #25842 cars added 2019-01-01 GT2 Request to Remove Mazda RX 7 Body Work Penalty #26024 weight 2019-01-01 GT2 GTX Homologation table update #26034 cars added
Sonoma Raceway Runoffs 2018 2018-10-10 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 No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 2017 2017-09-25 1:39.919Andrew Aquilante · fastest of 36 · top 5 within 2.9s 1:40.976Andrew Aquilante · fastest of 35 · top 5 within 2.6s No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 2016 2016-09-19 1:25.405Andrew Aquilante · fastest of 21 · top 5 within 2.8s 1:26.847Andrew Aquilante · fastest of 19 · top 5 within 1.5s No rule changes on record between these events
Daytona International Speedway Runoffs 2015 2015-09-21 1:53.652Jordan Bupp · fastest of 27 · top 5 within 1.2s 1:53.543Jordan Bupp · fastest of 22 · top 5 within 1.7s