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BoP Lab / Classes / T2

T2 vs AS vs SM vs HP pace at every track

Lap times across years say as much about the weather as the class. % of T2 is each class's best lap as a share of T2'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: remove one to add another)
vsAS×B-SpecEPFAFCFE2FFFPFVFXGT1GT2GTXvsHP×PP2vsSM×SMXSRF3STLSTUT1T2×T3T4Show 51 inactive classes
Series
Reference · what % is measured against, 12 events
Tracks · untick to narrow

Closest to the field: T2 100.0% of T2 Kurt Rezzetano, Daytona International Speedway Runoffs 2015 race · AS 96.9% of T2 James Jost, Indianapolis Motor Speedway Runoffs 2017 qualifying · SM 108.7% of T2 Michael Carter, Mid-Ohio Sports Car Course Runoffs 2016 race · HP 105.6% of T2 Vesa Silegren, Virginia International Raceway Runoffs 2022 race

1:402:002:202:4041 rule changes between Runoffs 2018 and Runoffs 201941 ▾69 rule changes between Runoffs 2019 and Runoffs 202069 ▾66 rule changes between Runoffs 2020 and Runoffs 202166 ▾55 rule changes between Runoffs 2021 and Runoffs 202255 ▾29 rule changes between Runoffs 2022 and Runoffs 202329 ▾68 rule changes between Runoffs 2023 and Runoffs 202468 ▾61 rule changes between Runoffs 2024 and Runoffs 202561 ▾70 rule changes between Runoffs 2025 and Runoffs 202670 ▾T2 race best at Runoffs 2015: 2:01.077 (Kurt Rezzetano)T2 race best at Runoffs 2016: 1:32.691 (John M Buttermore)T2 race best at Runoffs 2017: 1:48.769 (John M Buttermore)T2 race best at Runoffs 2018: 1:45.999 (John Kachadurian)T2 race best at Runoffs 2019: 1:58.551 (Cooper I MacNeil)T2 race best at Runoffs 2020: 2:26.803 (Kurt Rezzetano)T2 race best at Runoffs 2021: 1:48.474 (Kurt Rezzetano)T2 race best at Runoffs 2022: 2:04.756 (Kurt Rezzetano)T2 race best at Runoffs 2023: 2:01.201 (Kurt Rezzetano)T2 race best at Runoffs 2024: 2:23.261 (Kurt Rezzetano)T2 race best at Runoffs 2025: 2:23.483 (Kurt Rezzetano)T2 race best at Runoffs 2026: 2:23.141 (Scotty B White)T2 qualifying best at Runoffs 2015: 2:00.172 (Kurt Rezzetano)T2 qualifying best at Runoffs 2016: 1:31.563 (Preston Calvert)T2 qualifying best at Runoffs 2017: 1:48.618 (John M Buttermore)T2 qualifying best at Runoffs 2018: 1:45.032 (John Kachadurian)T2 qualifying best at Runoffs 2019: 1:57.537 (Cooper I MacNeil)T2 qualifying best at Runoffs 2020: 2:24.195 (Alan Kossof)T2 qualifying best at Runoffs 2021: 1:47.509 (Kurt Rezzetano)T2 qualifying best at Runoffs 2022: 2:00.276 (Kurt Rezzetano)T2 qualifying best at Runoffs 2023: 1:59.504 (Kurt Rezzetano)T2 qualifying best at Runoffs 2024: 2:22.117 (Kurt Rezzetano)T2 qualifying best at Runoffs 2025: 2:23.351 (Kurt Rezzetano)T2 qualifying best at Runoffs 2026: 2:23.977 (Scotty B White)AS race best at Runoffs 2015: 2:02.922 (Andy McDermid)AS race best at Runoffs 2016: 1:33.424 (Edward Hosni)AS race best at Runoffs 2017: 1:51.507 (Bryan Long)AS race best at Runoffs 2018: 1:50.345 (John Heinricy)AS race best at Runoffs 2019: 2:03.900 (James Jost)AS race best at Runoffs 2020: 2:27.668 (Gregory Eaton)AS race best at Runoffs 2021: 1:50.606 (Gregory Eaton)AS race best at Runoffs 2022: 2:04.578 (Gregory Eaton)AS race best at Runoffs 2023: 2:04.120 (Gregory Eaton)AS race best at Runoffs 2024: 2:26.429 (Gregory Eaton)AS race best at Runoffs 2025: 2:29.232 (Gregory Eaton)AS race best at Runoffs 2026: 2:28.471 (Andrew McDermid)AS qualifying best at Runoffs 2015: 2:01.746 (Tom Sloe)AS qualifying best at Runoffs 2016: 1:30.651 (Tom Sloe)AS qualifying best at Runoffs 2017: 1:45.220 (James Jost)AS qualifying best at Runoffs 2018: 1:47.782 (Andrew McDermid)AS qualifying best at Runoffs 2019: 2:02.938 (Gregory Eaton)AS qualifying best at Runoffs 2020: 2:27.045 (Gregory Eaton)AS qualifying best at Runoffs 2021: 1:50.427 (Drew Cattell)AS qualifying best at Runoffs 2022: 2:02.162 (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 2:03.082 (Daniel Richardson)AS qualifying best at Runoffs 2024: 2:26.578 (Gregory Eaton)AS qualifying best at Runoffs 2025: 2:26.792 (Andrew McDermid)AS qualifying best at Runoffs 2026: 2:26.911 (Andrew McDermid)SM race best at Runoffs 2015: 2:24.067 (Todd Lamb)SM race best at Runoffs 2016: 1:40.764 (Michael Carter)SM race best at Runoffs 2017: 1:59.100 (Michael Gagliardo)SM race best at Runoffs 2018: 1:55.278 (Michael Carter)SM race best at Runoffs 2019: 2:16.459 (Elivan Goulart)SM race best at Runoffs 2020: 2:43.748 (Preston Pardus)SM race best at Runoffs 2021: 1:58.837 (Brian Henderson)SM race best at Runoffs 2022: 2:19.107 (Travis Wiley)SM race best at Runoffs 2023: 2:16.229 (Julian DaCosta)SM race best at Runoffs 2024: 2:41.486 (Brett Kowalski)SM race best at Runoffs 2025: 2:44.430 (Kyle Greenhill)SM race best at Runoffs 2026: 2:42.725 (Francisco Barroso)SM qualifying best at Runoffs 2015: 2:18.661 (Andrew Carbonell)SM qualifying best at Runoffs 2016: 1:40.514 (Justin Hille)SM qualifying best at Runoffs 2017: 1:58.306 (Chris Haldeman)SM qualifying best at Runoffs 2018: 1:54.355 (Ken Sutherland)SM qualifying best at Runoffs 2019: 2:14.552 (Todd Buras)SM qualifying best at Runoffs 2020: 2:42.209 (Kyle Greenhill)SM qualifying best at Runoffs 2021: 1:57.695 (Brian Henderson)SM qualifying best at Runoffs 2022: 2:14.664 (Danny Steyn)SM qualifying best at Runoffs 2023: 2:14.986 (Danny Steyn)SM qualifying best at Runoffs 2024: 2:41.106 (Ethan Goulart)SM qualifying best at Runoffs 2025: 2:43.111 (Bobby Gossett)SM qualifying best at Runoffs 2026: 2:42.173 (Brett Kowalski)HP race best at Runoffs 2015: 2:17.981 (Alan (Aj) Hulse)HP race best at Runoffs 2016: 1:40.442 (Jason Isley)HP race best at Runoffs 2017: 1:57.569 (Vesa Silegren)HP race best at Runoffs 2018: 1:54.434 (Jason Isley)HP race best at Runoffs 2019: 2:15.062 (Ron Bartell)HP race best at Runoffs 2020: 2:47.444 (Steve Sargis)HP race best at Runoffs 2021: 1:56.188 (Steve Sargis)HP race best at Runoffs 2022: 2:11.803 (Vesa Silegren)HP race best at Runoffs 2023: 2:14.681 (Chris Schaafsma)HP race best at Runoffs 2024: 2:37.731 (Chuck Mathis)HP race best at Runoffs 2025: 2:38.270 (Steve Sargis)HP race best at Runoffs 2026: 2:38.036 (Steve Sargis)HP qualifying best at Runoffs 2015: 2:17.369 (Jason Isley)HP qualifying best at Runoffs 2016: 1:39.954 (Jason Isley)HP qualifying best at Runoffs 2017: 1:57.421 (Jason Isley)HP qualifying best at Runoffs 2018: 1:54.070 (Brian Linn)HP qualifying best at Runoffs 2019: 2:14.822 (Steve Sargis)HP qualifying best at Runoffs 2020: 2:39.695 (Daniel Meller)HP qualifying best at Runoffs 2021: 1:54.417 (Steve Sargis)HP qualifying best at Runoffs 2022: 2:13.952 (Steve Sargis)HP qualifying best at Runoffs 2023: 2:14.029 (Chris Schaafsma)HP qualifying best at Runoffs 2024: 2:38.445 (Chuck Mathis)HP qualifying best at Runoffs 2025: 2:38.785 (Steve Sargis)HP qualifying best at Runoffs 2026: 2:39.406 (Chris Schaafsma)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
T2ASSMHPsolid race · dashed qualifying · slower is lower
100%105%110%115%41 rule changes between Runoffs 2018 and Runoffs 201941 ▾69 rule changes between Runoffs 2019 and Runoffs 202069 ▾66 rule changes between Runoffs 2020 and Runoffs 202166 ▾55 rule changes between Runoffs 2021 and Runoffs 202255 ▾29 rule changes between Runoffs 2022 and Runoffs 202329 ▾68 rule changes between Runoffs 2023 and Runoffs 202468 ▾61 rule changes between Runoffs 2024 and Runoffs 202561 ▾70 rule changes between Runoffs 2025 and Runoffs 202670 ▾T2 race best at Runoffs 2015: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2016: 100.0% of T2's (John M Buttermore)T2 race best at Runoffs 2017: 100.0% of T2's (John M Buttermore)T2 race best at Runoffs 2018: 100.0% of T2's (John Kachadurian)T2 race best at Runoffs 2019: 100.0% of T2's (Cooper I MacNeil)T2 race best at Runoffs 2020: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2021: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2022: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2023: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2024: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2025: 100.0% of T2's (Kurt Rezzetano)T2 race best at Runoffs 2026: 100.0% of T2's (Scotty B White)T2 qualifying best at Runoffs 2015: 100.0% of T2's (Kurt Rezzetano)T2 qualifying best at Runoffs 2016: 100.0% of T2's (Preston Calvert)T2 qualifying best at Runoffs 2017: 100.0% of T2's (John M Buttermore)T2 qualifying best at Runoffs 2018: 100.0% of T2's (John Kachadurian)T2 qualifying best at Runoffs 2019: 100.0% of T2's (Cooper I MacNeil)T2 qualifying best at Runoffs 2020: 100.0% of T2's (Alan Kossof)T2 qualifying best at Runoffs 2021: 100.0% of T2's (Kurt Rezzetano)T2 qualifying best at Runoffs 2022: 100.0% of T2's (Kurt Rezzetano)T2 qualifying best at Runoffs 2023: 100.0% of T2's (Kurt Rezzetano)T2 qualifying best at Runoffs 2024: 100.0% of T2's (Kurt Rezzetano)T2 qualifying best at Runoffs 2025: 100.0% of T2's (Kurt Rezzetano)T2 qualifying best at Runoffs 2026: 100.0% of T2's (Scotty B White)AS race best at Runoffs 2015: 101.5% of T2's (Andy McDermid)AS race best at Runoffs 2016: 100.8% of T2's (Edward Hosni)AS race best at Runoffs 2017: 102.5% of T2's (Bryan Long)AS race best at Runoffs 2018: 104.1% of T2's (John Heinricy)AS race best at Runoffs 2019: 104.5% of T2's (James Jost)AS race best at Runoffs 2020: 100.6% of T2's (Gregory Eaton)AS race best at Runoffs 2021: 102.0% of T2's (Gregory Eaton)AS race best at Runoffs 2022: 99.9% of T2's (Gregory Eaton)AS race best at Runoffs 2023: 102.4% of T2's (Gregory Eaton)AS race best at Runoffs 2024: 102.2% of T2's (Gregory Eaton)AS race best at Runoffs 2025: 104.0% of T2's (Gregory Eaton)AS race best at Runoffs 2026: 103.7% of T2's (Andrew McDermid)AS qualifying best at Runoffs 2015: 101.3% of T2's (Tom Sloe)AS qualifying best at Runoffs 2016: 99.0% of T2's (Tom Sloe)Off the chart: AS qualifying best at Runoffs 2017: 96.9% of T2's (James Jost)AS qualifying best at Runoffs 2018: 102.6% of T2's (Andrew McDermid)AS qualifying best at Runoffs 2019: 104.6% of T2's (Gregory Eaton)AS qualifying best at Runoffs 2020: 102.0% of T2's (Gregory Eaton)AS qualifying best at Runoffs 2021: 102.7% of T2's (Drew Cattell)AS qualifying best at Runoffs 2022: 101.6% of T2's (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 103.0% of T2's (Daniel Richardson)AS qualifying best at Runoffs 2024: 103.1% of T2's (Gregory Eaton)AS qualifying best at Runoffs 2025: 102.4% of T2's (Andrew McDermid)AS qualifying best at Runoffs 2026: 102.0% of T2's (Andrew McDermid)Off the chart: SM race best at Runoffs 2015: 119.0% of T2's (Todd Lamb)SM race best at Runoffs 2016: 108.7% of T2's (Michael Carter)SM race best at Runoffs 2017: 109.5% of T2's (Michael Gagliardo)SM race best at Runoffs 2018: 108.8% of T2's (Michael Carter)SM race best at Runoffs 2019: 115.1% of T2's (Elivan Goulart)SM race best at Runoffs 2020: 111.5% of T2's (Preston Pardus)SM race best at Runoffs 2021: 109.6% of T2's (Brian Henderson)SM race best at Runoffs 2022: 111.5% of T2's (Travis Wiley)SM race best at Runoffs 2023: 112.4% of T2's (Julian DaCosta)SM race best at Runoffs 2024: 112.7% of T2's (Brett Kowalski)SM race best at Runoffs 2025: 114.6% of T2's (Kyle Greenhill)SM race best at Runoffs 2026: 113.7% of T2's (Francisco Barroso)SM qualifying best at Runoffs 2015: 115.4% of T2's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 109.8% of T2's (Justin Hille)SM qualifying best at Runoffs 2017: 108.9% of T2's (Chris Haldeman)SM qualifying best at Runoffs 2018: 108.9% of T2's (Ken Sutherland)SM qualifying best at Runoffs 2019: 114.5% of T2's (Todd Buras)SM qualifying best at Runoffs 2020: 112.5% of T2's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 109.5% of T2's (Brian Henderson)SM qualifying best at Runoffs 2022: 112.0% of T2's (Danny Steyn)SM qualifying best at Runoffs 2023: 113.0% of T2's (Danny Steyn)SM qualifying best at Runoffs 2024: 113.4% of T2's (Ethan Goulart)SM qualifying best at Runoffs 2025: 113.8% of T2's (Bobby Gossett)SM qualifying best at Runoffs 2026: 112.6% of T2's (Brett Kowalski)HP race best at Runoffs 2015: 114.0% of T2's (Alan (Aj) Hulse)HP race best at Runoffs 2016: 108.4% of T2's (Jason Isley)HP race best at Runoffs 2017: 108.1% of T2's (Vesa Silegren)HP race best at Runoffs 2018: 108.0% of T2's (Jason Isley)HP race best at Runoffs 2019: 113.9% of T2's (Ron Bartell)HP race best at Runoffs 2020: 114.1% of T2's (Steve Sargis)HP race best at Runoffs 2021: 107.1% of T2's (Steve Sargis)HP race best at Runoffs 2022: 105.6% of T2's (Vesa Silegren)HP race best at Runoffs 2023: 111.1% of T2's (Chris Schaafsma)HP race best at Runoffs 2024: 110.1% of T2's (Chuck Mathis)HP race best at Runoffs 2025: 110.3% of T2's (Steve Sargis)HP race best at Runoffs 2026: 110.4% of T2's (Steve Sargis)HP qualifying best at Runoffs 2015: 114.3% of T2's (Jason Isley)HP qualifying best at Runoffs 2016: 109.2% of T2's (Jason Isley)HP qualifying best at Runoffs 2017: 108.1% of T2's (Jason Isley)HP qualifying best at Runoffs 2018: 108.6% of T2's (Brian Linn)HP qualifying best at Runoffs 2019: 114.7% of T2's (Steve Sargis)HP qualifying best at Runoffs 2020: 110.7% of T2's (Daniel Meller)HP qualifying best at Runoffs 2021: 106.4% of T2's (Steve Sargis)HP qualifying best at Runoffs 2022: 111.4% of T2's (Steve Sargis)HP qualifying best at Runoffs 2023: 112.2% of T2's (Chris Schaafsma)HP qualifying best at Runoffs 2024: 111.5% of T2's (Chuck Mathis)HP qualifying best at Runoffs 2025: 110.8% of T2's (Steve Sargis)HP qualifying best at Runoffs 2026: 110.7% of T2's (Chris Schaafsma)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
T2ASSMHPsolid race · dashed qualifying · each class's best lap as a share of T2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventT2ASSMHP
Qual best Race best Trap Qual best Race best Trap vs T2 % of T2 Qual best Race best Trap vs T2 % of T2 Qual best Race best Trap vs T2 % of T2 
Road America Runoffs 20262026-09-282:23.977Scotty 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%)2:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%)2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%)151.0Andrew McDermid-0.6 mph (-0.4%)+5.330squal +2.934s103.7%qual 102.0%2:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)119.6Wyatt Couch+0.3 mph (+0.3%)+19.584squal +18.196s113.7%qual 112.6%2:39.406Chris Schaafsma · fastest of 15 · top 5 within 7.7s+0.621s (+0.39%)2:38.036Steve Sargis · fastest of 11 · top 5 within 4.6s-0.234s (-0.15%)122.7Jesse Prather-2.2 mph (-1.8%)+14.895squal +15.429s110.4%qual 110.7%
70 rule changes (T2: 26, AS: 13, SM: 2, HP: 29)20 weight · 11 engine · 8 induction · 7 cars added · 6 tyres & wheels · 4 suspension & brakes · 2 aero · 1 removed · 4 wording · 7 othershowhide
  • AS 2016+ Camaro Spec Line Full Prep #39646tyres & wheels
  • AS Consideration of Pirelli P Zero Trofeo Track for AS Competition #40495tyres & wheels
  • T2 TCR Data Points - BoP #40508weight +300 lbs
  • AS Change in 9.1.6.D.4.d.5 in Suspension Mounting Points #40094other
  • AS Re-Add 4.6L 4v 96-04 Mustang Cobra #40239weight
  • AS Errors and Omissions #40532weight
  • HP Mini Cooper Compression Ratio #40517engine
  • HP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7 #40322engine
  • HP 1275 Midget/Sprit Alternate intake manifold E/O #40370induction
  • HP HP Honda Civic (92-95) #40464weight -70 lbs
  • SM Rear Toe Link #40271other
  • T2 2023 TCR Hyundais #40278cars added
  • AS Clarification for LM7 Holley Carburetor #40167engine
  • HP Austin Healy Sprite/ MG Midget 1275 Induction Change Request #40213weight
  • T2 2015+ Ecoboost Mustang #40005weight -100 lbs
  • T2 C6 Corvette - All Body Trims Requested #40174aero
  • T2 T2-TCR Table Mazda 3 #40209tyres & wheels
  • HP Miata track width - errors and omissions #39976wording
  • HP Triumph GT6 Spec Change. #40098induction
  • HP Request to Classify BMW E21 320i #40110cars added
  • HP BMW 318is 84-85 engine displacement correction #40116engine
  • AS Header Information Update for EFI Engine Build Sheets #39886engine
  • AS Errors and Omissions #39933weight
  • SM Part Number Change Request #39914wording
  • T2 14-17 BMW 435i Brake Approval Request #39910suspension & brakes
  • T2 Porsche Cayman S Spec Lines Needed for Atlanta HST #39947engine
  • T2 Please address loopholes in T2 TCR #40002weight
  • AS Re-Organization of AS Spec lines for 2026 #39887removed
  • HP Clarification On Oil Cooler Ducting #39604tyres & wheels
  • HP Honda Fit 2015-19 Error in Engine Classification #39853engine
  • T2 BMW 240i Permitted Tune #39861other
  • AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055weight
  • HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1 #39589engine
  • T2 Request to Add 2014-2017 435i to T2 #38991cars added
  • T2 Consideration for Nissan Z & NISMO Z to Touring 2 Class #39296cars added
  • T2 Allow Alt Bushing Material in Toe Links #39607suspension & brakes
  • T2 Request for Classification of MG6 TCR in T2-TCR Class #39702cars added
  • AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501induction
  • HP E/O: Improve Consistency of the Spec Lines #39500other
  • HP Request to Reclassify BMW 2002 Into H Production #39567cars added
  • T2 Alternate Placement of Fuse Panel and Electronics Request #39370other
  • T2 Rebalance Blackwing Cadillac T2 for 2026 #39426weight -50 lbs
  • T2 C6 LS2 Corvette Parity Request #39472induction
  • T2 T2 Tire Sizing #39490weight -25 lbs
  • T2 Rear Spoiler for Mustang GT S550 (15-23) #39499aero
  • T2 Clarify T4 Brake Rotor Allowance #39503suspension & brakes
  • AS 1994 Mustang Spec Line Request #39104engine
  • HP Request to Re-Classsify Datsun SPL-311 to HP from FP #39116cars added
  • HP TR2 Notes E&O #39180weight
  • HP Balance of Power #39187weight +50 lbs
  • HP Alternative BOP Request for 84-87 Honda CRX/Civic #39223tyres & wheels
  • T2 Help the 2011-2014 s197Mustang GT and Boss302 Less Restriction #38523induction
  • T2 Improving Competitiveness of Gen 5 Camaro SS #39021weight -50 lbs
  • T2 Adjust T2 Darkhorse R #39346weight
  • AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbs
  • HP Please Lower Weight of 280Z #38871weight -160 lbs
  • HP Miata Weight Adjustment Follow Up #38949weight -25 lbs
  • HP Weight Break for 1098 Midget / Sprite #38970weight -80 lbs
  • HP HP Volvo 142 spec omission #38994engine
  • HP HP Mini DOHC 1.6 #38996engine
  • HP Add to Rabbit description #39019wording
  • HP Clean-up 9.1.5.E.7e #39025suspension & brakes
  • HP Add TB size to Ford Mustang (94-98) Spec Line #39130induction
  • T2 ND Gearset Request for T4 #39166other
  • T2 ND Spec Lines Wrong PT#'s #39170weight
  • T2 Touring 2 Post-Runoffs BOP Adjustments and Changes #39274induction -50 lbs
  • T2 Adjust rev limit on Spec Corvette in T2 #39282other
  • HP HP Plymouth Arrow spec omission #38995wording
  • HP Add Wheel Diameter to Appendix G #39008tyres & wheels
  • HP Add TB ID tolerance to general Prod rules #39009induction
Road America Runoffs 20252025-09-292:23.351Kurt 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%)2:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%)2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%)151.5Andrew McDermid+1.9 mph (+1.3%)+5.749squal +3.441s104.0%qual 102.4%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%)+20.947squal +19.760s114.6%qual 113.8%2:38.785Steve Sargis · fastest of 17 · top 5 within 1.9s+0.340s (+0.21%)2:38.270Steve Sargis · fastest of 14 · top 5 within 2.4s+0.539s (+0.34%)124.9Chris Schaafsma+2.1 mph (+1.7%)+14.787squal +15.434s110.3%qual 110.8%
61 rule changes (T2: 29, AS: 11, SM: 4, HP: 17)15 weight · 11 induction · 8 engine · 6 cars added · 6 tyres & wheels · 4 suspension & brakes · 2 removed · 2 wording · 7 othershowhide
  • T2 Incorrect Touring Heading #38451wording
  • T2 Clarifications needed to BMW M2 CS cup line #38536tyres & wheels
  • T2 Fix brake allowance supersessions. #38554suspension & brakes
  • T2 C5 Corvette correction #38782induction
  • AS RE: Previous Letter 37695 Update #38245weight -75 lbs
  • HP BMW Z4 update #38490induction
  • HP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
  • AS Errors and Omissions #38234engine
  • HP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • AS Errors and Omission #38055induction
  • AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197engine
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • T2 C6 T-2 Corvette 6 Liter Engine Restrictor #37490induction
  • T2 370Z Mid link Replacement for True Coil Overs and OEM Wheel Size #38014tyres & wheels
  • T2 T2 Cadillac tire #38210tyres & wheels
  • AS Flotek Head Plunge Cut Inconsistencies #37502other
  • AS Notes clean up #37693weight
  • HP Request for Classification of Chevrolet Spark #37755cars added
  • HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
  • T2 Please class the Darkhorse R in T2 #37295cars added
  • T2 T2 350Z Spec Line Cleanup #37603weight
  • AS Race memo #37902engine
  • HP Request Competition Adjustment to BMW Z3 2.5L #37120induction
  • HP HP Class Adjustments #37459weight +50 lbs
  • HP Interpretation of Production Rules on Mirrors #37235other
  • HP Weight Reduction for Honda S2000 #37466weight
  • HP Mazda 1999 Miata 1.8L #37488weight -50 lbs
  • HP MINI Cooper (07-13) Spec Line Correction: Errors and Omissions #37560engine
  • T2 T2 BOP #37312induction
  • HP Effective date for Jan 2025 GCR updates #37654induction
  • T2 Mustang Update backdate #37275removed
  • T2 BOP Adjustment for 2016 - Camaro SS/1LE #37434weight +100 lbs
  • T2 BMW M235iR TCS CHANGE REQUEST #37470other
  • T2 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added
  • AS Increase Coyote Engine Restrictor to 80mm #36177induction
  • AS Performance Pack for 2015+ Mustang #36867weight
  • AS Gear Ratios #37131engine
  • AS ECU specs for LS engine #37208engine
  • HP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
  • HP Request to Update 1988-1991 Civic to Match 1988-1991 CRX #37444weight -70 lbs
  • T2 Remove spec lines that have expired #37269induction
  • T2 BoP for the Various Mustangs #37185weight -50 lbs
  • T2 Spec Corvette Line Clarification. #37441weight
  • HP MINI Cooper Spec Line Correction - Rear Brake Rotor Diameter #37176suspension & brakes
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • T2 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes
  • T2 Request Less Restriction for Ls-3 Engined C6 Corvette #36810induction
  • T2 Fuel Emissions Components #37076engine
  • T2 fix brake wording #37129suspension & brakes
  • T2 Evaporative emissions systems #37130engine
  • T2 Move Spec Boxster to T4 #37158cars added
  • T2 Corvette Wheels #37169tyres & wheels
  • T2 BMW 320i Spec Line #37204other
  • T2 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added
  • T2 Please Consider Allowing Update to the C5 Corvette #37298induction
  • T2 Major error in lane, but nobody ran it. #37302removed
  • HP 1275 HP Spridget Level 2 Only #36518other
  • HP Request for Classification of 1989-1994 Suzuki Swift GT 16V Twin #36858cars added
  • T2 Spec Corvette Change for T2 #37127tyres & wheels
Road America Runoffs 20242024-10-012:22.117Kurt 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%)2:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%)2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%)149.6Gregory Eaton+0.4 mph (+0.3%)+3.168squal +4.461s102.2%qual 103.1%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%)+18.225squal +18.989s112.7%qual 113.4%2:38.445Chuck Mathis · fastest of 20 · top 5 within 3.4s-1.250s (-0.78%)2:37.731Chuck Mathis · fastest of 19 · top 5 within 2.3s-9.713s (-5.80%)122.8William Trainer-0.3 mph (-0.2%)+14.470squal +16.328s110.1%qual 111.5%
68 rule changes (T2: 31, AS: 11, SM: 4, HP: 22)20 weight · 9 cars added · 8 suspension & brakes · 7 engine · 4 induction · 4 tyres & wheels · 3 wording · 13 othershowhide
  • AS Mustang transmission ratios #36662engine
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • HP Errant entry in HP production line item #36231other
  • T2 Errors #36214induction -75 lbs
  • T2 Subaru Appeal #36258other
  • T2 S550 Brakes #36571suspension & brakes
  • T2 Mustang T2/T3 #35877other
  • T2 S550 Brakes #35926suspension & brakes
  • T2 T2-T4 Driveshaft Mistake...? #36050weight
  • T2 request for allowance of 6 piston calipers for T2 C5 corvettes #36126other
  • T2 B8/8.5 Audi S4 T3 and T2 #36195cars added
  • AS Request for Classification of 2018-2023 mustang In #35764cars added
  • HP NIssan 300ZX Z31 to EP #35830cars added
  • HP RX7 1993 and Up Request In EP Spec Lines, classify #36031cars added
  • HP Clean-up Multiple EP RX-8 Spec Lines In EP #36156wording
  • AS 6th gen Camaro limited prep #35733cars added
  • AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK #35825cars added
  • AS Full Prep Head #35891other
  • HP Replace plastic panels #35875other
  • T2 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine
  • T2 Competition Adjustment Request/Wheel Size of E46 #35895tyres & wheels
  • T2 Driveshafts #35916weight
  • AS Restricted Prep Aftermarket Parts Request #35682other
  • AS Allowance of 11 #35824tyres & wheels
  • T2 Brake Request for 2009 Porsche Cayman #35723suspension & brakes
  • AS Request to Classify 1970-1981 Camaro and Firebird in AS #33659cars added
  • AS Fuel Cell 12 #34194other
  • AS Please Classify the 6th Gen Into AS. #35448cars added
  • AS spec lines #35713cars added
  • HP GCR Correction - Redundant HP Spec Lines #35623engine
  • T2 Reorganize Spec Lines #35375induction
  • T2 370Z Brake Rotor Size Correction #35487suspension & brakes
  • T2 Letter #35154 2018+ Mustang GT Expansion #35488suspension & brakes
  • HP Update 1988-1991 Civic to Match 1988-1991 CRX #35399weight
  • T2 2015+ Mustang Sway Bar and A-Arm Request #35154suspension & brakes
  • T2 Brake Kits #35245suspension & brakes
  • T2 Runoffs wording on Caddy in T2 #35377wording
  • T2 More Car Lightening Stuff #35319weight
  • T2 Inclusion of B-C spec cars in T4 #35374other
  • T2 T2-T4 Set expiration dates on spec lines #35378induction
  • T2 Reply to letter #35161 and #31661 #35384weight +75 lbs
  • HP Request to Review Z3 2.5 Spec Line #35073weight +50 lbs
  • HP Parity in HP #35138other
  • HP Spitfire classification #35224engine
  • HP Miata Alternate Head #35253weight -50 lbs
  • HP Triumph GT6 Adjustments #35255weight
  • HP Honda S2000 throttle body #35272induction
  • HP Front Header/Nose Panel Alternate Material For 84-87 CRX #35301engine
  • HP Correction within Triumph TR8 Spec Line #35315engine
  • HP Correction to EP 924S/944 Spec Line #35317weight
  • HP Review Classification of HP Mazda 2 #35318weight +75 lbs
  • T2 Rebalance Blackwing Cadillac T2 #35079tyres & wheels
  • T2 M2 CS RACING #35130weight -50 lbs
  • T2 Spec Corvette in T2 #35139weight -175 lbs
  • T2 T2 Viper BoP #35155tyres & wheels
  • T2 BOP Adjustment for 5.0L Mustangs #35156weight +75 lbs
  • T2 Take at Look at T-2 BOP #35161weight -50 lbs
  • T2 C5 Corvette Spec Line Oversight #35169weight
  • T2 Requested Update of Model Years of 370Z #35231other
  • HP Request to Adjust Weight of 1988-1991 CRX/Civic #35115weight -70 lbs
  • HP Porsche 944/924S Rule Change Request #35002weight
  • HP FP and HP Toyota Corolla #35030weight -43 lbs
  • HP Weight Reduction for Mazda 626 #35031weight -100 lbs
  • HP Triumph GT6 Adjustments #35054weight -30 lbs
  • T2 M2 CS RACING #35122other
Virginia International Raceway Runoffs 20232023-09-231:59.504Kurt 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%)2:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%)2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%)154.6James Jost+3.7 mph (+2.5%)+2.919squal +3.578s102.4%qual 103.0%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%)+15.028squal +15.482s112.4%qual 113.0%2:14.029Chris Schaafsma · fastest of 25 · top 5 within 2.7s+0.077s (+0.06%)2:14.681Chris Schaafsma · fastest of 24 · top 5 within 2.5s+2.878s (+2.18%)119.4William Trainer-0.8 mph (-0.7%)+13.480squal +14.525s111.1%qual 112.2%
29 rule changes (T2: 17, AS: 4, SM: 1, HP: 7)7 weight · 5 suspension & brakes · 4 induction · 3 engine · 3 tyres & wheels · 1 cars added · 1 wording · 5 othershowhide
  • HP Larger chokes #34681induction
  • AS Crate Motor Part Numbers #32944engine
  • AS Request wheel size change #33007tyres & wheels
  • AS Alternative Upper Front Control Arms for Dodge Challenger #33352engine
  • AS Front Brake Caliper Adapters for Dodge Challenger #33353suspension & brakes
  • T2 Corvette LS2 Restrictor Plate Adjustment #34456induction
  • T2 Blacking Cadillac Fuel Capacity #34624engine
  • T2 Rules Clarification for Mazda RX8 Spec Line #34395weight
  • T2 rule book corrections #34437wording
  • T2 Ride Height Correction for the T3 Solstice. #34615suspension & brakes
  • HP Correct Intake Valve Size on 1500cc Midget/Spitfire #34419induction
  • HP ITC to FP? #34286other
  • T2 370Z Obsolete Parts & NISMO Alternatives to SPL Parts #34297weight
  • HP Request to Classify Sonic and Fiesta in HP #34264cars added
  • T2 2009 Porsche Cayman Classing Request #34147other
  • T2 C5 Z06 Straight Line Speed #33575weight
  • T2 Allowance of any nonmetallic bushing material in T2 #33833suspension & brakes
  • T2 Allow Adjustable stabilizer bar links #33861suspension & brakes
  • T2 Honda Civic Type R Tire Size Increase #33672tyres & wheels
  • T2 C5 Corvette Swaybars #33269other
  • T2 Mustang OEM Grill Request #33333other
  • HP MGB HP Weight Break and/or Hybrid 1/2 Prep in HP #33127weight
  • HP Datsun 510 Help #33568weight -50 lbs
  • HP Review Limited Prep Port Matching Rules #33600induction
  • SM BOP for NB1 and NB2 #32309weight
  • T2 BMW M235iR/M240iR Aftermarket 2WNR Shocks Allowed - Touring 2 #33464suspension & brakes -50 lbs
  • T2 Touring (T2-T5) Category #33617tyres & wheels
  • T2 ENO 9.1.9.2.D.1.e.1.a. #33651other
  • T2 Heavy Cars #33345weight +125 lbs
Virginia International Raceway Runoffs 20222022-09-242:00.276Kurt 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%)2:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%)2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%)150.9James Jost-3.0 mph (-2.0%)-0.178squal +1.886s99.9%qual 101.6%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%)+14.351squal +14.388s111.5%qual 112.0%2:13.952Steve Sargis · fastest of 23 · top 5 within 3.9s-0.870s (-0.65%)2:11.803Vesa Silegren · fastest of 21 · top 5 within 6.3s-3.259s (-2.41%)120.2Chris Schaafsma-4.7 mph (-3.8%)+7.047squal +13.676s105.6%qual 111.4%
55 rule changes (T2: 20, AS: 9, SM: 1, HP: 25)10 cars added · 10 weight · 7 induction · 7 suspension & brakes · 6 engine · 3 tyres & wheels · 4 wording · 8 othershowhide
  • AS Request to add Hoosier W2 #33031other
  • AS correction of Dodge Challenger specification line #33151wording
  • HP Request to classify VW New Beetle 2.5L in EP #32725cars added
  • HP Request Rotary Injection on Dual Y manifold #32775engine
  • HP Request for Corrado Stroke & Displacement Correction #32985engine
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • HP Subaru BRZ Model Years #32500other
  • T2 BMW M235iR/M240iR Min Weight Clarification #32430weight
  • T2 Follow up to Letter 30888 #32477other
  • HP EP MX-5 Global Cup Car #32218weight
  • HP Please Class BMW 128i in EP #32370cars added
  • HP Inconsistency in Body Work Descriptions #32396other
  • T2 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes
  • T2 Request BoP E92 torque #32456other
  • T2 Classify Cadillac Blackwing #32535cars added
  • HP Mazda RX8 with 13b Rotary #32170induction
  • HP Request Idle control valve clarification #32178engine
  • HP Classify VW New Beetle in HP. #32241cars added
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • T2 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine
  • T2 BMW M2 CS Cup 2020- Exhaust #32243tyres & wheels
  • T2 RequestT2 classification- 2022 Cadillac CT4-V Blackwing #32263cars added
  • HP Weight Change for Competition Adjustment #31182weight +45 lbs
  • HP EP Adjustments #31858induction
  • HP 1999 3.8L Ford Mustang to EP? #31635weight
  • HP Improved Touring Tires #32064tyres & wheels
  • T2 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes
  • T2 C6 Restrictor Help #31995induction
  • HP Throttle Body and Idle Air #31800induction
  • HP Incorrect Valve Size Changes in Jan 2022 GCR for FIAT X1/9 #31990engine
  • T2 BMW Z4M Adjustment #31885weight -50 lbs
  • AS Proposed Revisions to SCCA GCR 2021 Appendix M, Part 3 #30295other
  • AS specification line consolidation and correction #31846wording
  • AS correction of SMG specification line #31847suspension & brakes
  • AS Alternate cylinder heads for full prep engine builds - Evaluation #31851engine
  • HP Porsche 968 Engine Questions #31478induction
  • HP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom #31592tyres & wheels
  • HP Weight Adjustment To Fiat X1/9 Spec Lines, H-Production #31653weight -50 lbs
  • HP 1500 Midget #31665cars added
  • HP BMW Z3 2.5L Spec Line #31724induction
  • HP Request weight requirement for 1500 MG Midget #31802weight
  • T2 Touring 2 BOP adjustments for 2022 #31480weight -50 lbs
  • T2 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes
  • T2 Request to clarify radiator hoses #31682wording
  • T2 Clarify Permitted/Allowed #31743suspension & brakes
  • T2 SMG #31837other
  • HP 944S2 Restrictor #31396induction
  • HP Classing Clarification for 1986 Toyota Corolla FX16 #31527cars added
  • T2 Typo for BMW M2 CS Cup 2020 #31173suspension & brakes
  • T2 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added
  • T2 Request new car 2017 BMW M2 #30486cars added
  • T2 Request to Classify Porsche 997.2 GTS in T2 (body not = to C2S) #30686cars added
  • AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457other
  • AS Request Pontiac GTO tire size change #30881weight
  • HP E&O; MR2 Track #31120wording
Indianapolis Motor Speedway Runoffs 20212021-09-251:47.509Kurt 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. White1:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%)1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%)153.8James Jost+2.132squal +2.918s102.0%qual 102.7%1:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)119.8Kyle Greenhill+10.363squal +10.186s109.6%qual 109.5%1:54.417Steve Sargis · fastest of 42 · top 5 within 3.7s-3.004s (-2.56%)1:56.188Steve Sargis · fastest of 42 · top 5 within 2.9s-1.381s (-1.17%)122.0William Trainer+7.714squal +6.908s107.1%qual 106.4%
66 rule changes (T2: 30, AS: 14, SM: 1, HP: 21)19 weight · 14 cars added · 6 suspension & brakes · 5 engine · 3 induction · 2 tyres & wheels · 4 wording · 13 othershowhide
  • T2 BMW M2 CS Power Stick Part Number #31087wording
  • HP Request to Allow F22c Engine for 2000-2003 Honda S2000 #30548engine
  • HP Request a review of the S14 240SX in EP. #30873weight -200 lbs
  • T2 997.1 EO #30933other
  • HP Lotus/Caterham 7 America Request #30392engine
  • HP Request to classify ITC Plymouth Arrow #30588cars added
  • HP Reclassification of the 1984/85 BMW 318i from FP to HP #30661cars added
  • HP Reclassify Daimler SP 250 #30721cars added
  • T2 Request #30406weight
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • AS Request to consolidate SN95 Mustang '94-'04 Mustang spec lines #30428cars added
  • AS American Sedan Transmission Rule Change Request #30595weight
  • AS Correction to specifications inadvertently deleted #30691wording
  • AS weight adjustments #30700weight +50 lbs
  • HP 924 Brakes- and Thank You. #30614suspension & brakes
  • HP Clarify Application of Percentage Based Weight Penalties #30669weight
  • HP Correct Induction Error on new HP Mazda 626 Spec Line #30702induction
  • T2 Civic Type R Brake Rotors #29817suspension & brakes
  • T2 Mustang S550 Parity in T2 #29925other
  • T2 Request BOP on BMW Z4 T2 car #30597weight +50 lbs
  • T2 E92 #30639weight -50 lbs
  • HP Volvo 142 spec line complete. #29479cars added
  • HP Request to Classify 93-98 Volkswagen Golf to HP #29790cars added
  • HP Appeal of Request to Move Porsche 924 to HP #30132cars added
  • HP Change Classification of 84-87 Mazda 626 from FP to HP #30350cars added
  • HP Fiat X1/9 brake rotors #30423suspension & brakes
  • T2 C5/6 Corvette in T1, T1-LP and T2 Dry Sump Standardization #29046other
  • T2 Request for Chevrolet Camaro 1LE (2016-) Auto Trans #29067other
  • T2 Request E46 M3 Minimum Competition Weight #29429weight -100 lbs
  • T2 Request to add 2015 to Chevrolet Camaro SS/1LE 2010-2014 #29736other
  • HP Request to Classify 2012-2015 MINI Cooper Coupe in HP #30167cars added
  • HP Request clarification on VW 1.8 Rabbit GTI Spec Line #30368wording
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • T2 Request consistency review in GCR #30263other
  • T2 Class Spec Corvette in T2? #30297cars added
  • T2 E92 BMW Spring Rate Request #30391suspension & brakes
  • T2 Please correct recent T2 Spec Line #30401suspension & brakes
  • AS AS Mustang LP 4.6 3V Classification Transmission Request #29886weight
  • AS Request CF driveshaft on CTS-V for durability improvement #30117engine
  • AS Adjustment to model years of 5th generation RP Camaro #30348engine
  • T2 Request BMW M2CS door glass removal #30254other
  • T2 Request Addition of BMW M240iR #29503weight
  • T2 2021 Toyota Supra #29567cars added
  • T2 Request Cold Air Intake for Honda Civic Type R #29942induction
  • T2 Adjust T2 spec line that was missed in T2 BOP #30055weight -50 lbs
  • T2 Fix T2 Mustang spec line #30106other
  • T2 Z4 Wheel Size #30113tyres & wheels
  • T2 Clarify T2 Spec lines #30194tyres & wheels
  • AS Request for 2015 -2017 Ford Mustang Spec Line #29514cars added
  • AS Request Trunk lid / Rear Hatch clarification #29591wording
  • AS Common Weight for CTS-V Tire #29759weight
  • AS Correction to specifications inadvertently deleted #30041cars added
  • HP Alternate Front Brake Rotors and Calipers for EP AH 3000 #29893suspension & brakes
  • T2 Request to Classify BMW M2 CS #29523cars added
  • T2 350Z Rear Caliper Replacement #29710other
  • T2 Request Mustang 8.8” rear axle replacement #29860other
  • T2 Cap year range on all 86s #29908other
  • AS Request Additional Engine Options for Dodge Challenger Spec Line #29543engine
  • AS Rule simplification spec line communization #29824weight
  • HP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines #29195weight -50 lbs
  • HP Correct Wording for Level 1 and Level 2 Induction Systems #29406induction
  • HP Weight Reduction for Datsun Roadster #29409weight -75 lbs
  • HP EP TR8 Adjustment #29512weight -100 lbs
  • T2 Request to Reevaluate T2 Spec Line for E92 M3 #28266weight -50 lbs
  • T2 Request for Parity Among Vehicles Including S550 Mustang #29486weight -75 lbs
  • T2 Alfa Romeo 4C Launch Edition #29531other
Road America Runoffs 20202020-10-022:24.195Alan Kossof · fastest of 15 · top 5 within 2.5s2:26.803Kurt Rezzetano · fastest of 14 · top 5 within 2.2s147.3Mark Boden2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s149.2Gregory Eaton+0.865squal +2.850s100.6%qual 102.0%2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill+16.945squal +18.014s111.5%qual 112.5%2:39.695Daniel Meller · fastest of 19 · top 5 within 3.3s2:47.444Steve Sargis · fastest of 15 · top 5 within 6.1s123.1William Trainer+20.641squal +15.500s114.1%qual 110.7%
69 rule changes (T2: 30, AS: 16, SM: 2, HP: 21)12 weight · 11 suspension & brakes · 10 engine · 8 induction · 7 cars added · 4 tyres & wheels · 2 aero · 7 wording · 8 othershowhide
  • HP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O #29458tyres & wheels
  • SM Radiator E&O Clarifications #29294engine
  • T2 Request 2018+ mustang swaybar update #28659suspension & brakes
  • T2 Request to Clarify New 2-piece Brake Rotor Rule #29106suspension & brakes
  • T2 please consider BoP for the following cars in T2 #29266weight -50 lbs
  • T2 Request clarification on most recent approval by the Board #29284suspension & brakes
  • AS Dodge Challenger AS Spec Line Clarification #28698induction
  • AS Dodge Challenger AS Spec Line Clarification #2 #28699aero
  • HP EP BMW Z3 Rule Clarification #28998engine
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T2 Request to correct GCR for 2018+ FORD Mustang GT & Ecoboost #28803wording
  • AS Support for R-Type Specification Tires #27450tyres & wheels
  • AS Spec Tire Request #27519tyres & wheels
  • AS Restrictor Plate Change for RP 2011+ Mustang with Coyote Engine #27675induction
  • AS 2005-2009 Restricted Prep 4.6 3V #27908engine
  • AS Request for 2005-2009 Restricted Prep 4.6 3V Parts #27909engine
  • AS Request for Full Preparation Classification for 2010-2014 Camaro #28030other
  • AS Cylinder Heads #28696engine
  • AS Request for Max Rotor Diameter Change #28748suspension & brakes
  • AS Request increase rotor diameter #28797other
  • HP Request to Classify Porsche 911 2.0L #28456cars added
  • HP Request Dual Carbs for 1.8 VW GTI Mk1 #28922engine
  • T2 Request to Add a Vehicle to the Roster (contd.) #27698other
  • T2 Request brake upgrade and electric power steering pump #28946suspension & brakes
  • HP BMW Cylinder Head Casting and Part Numbers #28708engine
  • T2 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added
  • T2 Consider coil spring conversion Corvette in T2 #28824suspension & brakes
  • AS weight adjustments for 2020 season #28785weight -50 lbs
  • HP Request to Classify 1990-1994 Mazda Protege #28381cars added
  • HP Error in Mini Cooper Spec Line #28713wording
  • T2 Please Add the Following BBK to Allowed List for E92 M3 #28421wording
  • T2 C5 Weight Adjustment #28433weight -50 lbs
  • T2 Z3M Roadster Weight #28437weight
  • HP Caterham 7 Spec Line #28498engine
  • T2 Limit Changes to the 997.2 Porsche #28242aero
  • T2 Correct T2 Mustang Transmission #28732wording
  • HP Letter #27917 #28085induction
  • HP Request to Classify 2007 - 2013 Mini Cooper Convertible #28111cars added
  • HP Allow HP Datsun 510 Under Level 2 to Utilize Datsun Z Brakes #28121suspension & brakes
  • HP Request to allow 40 DCOE carb for the Datsun 510 #28195induction
  • HP Request Ford Fiesta Weight Adjustment #28337weight
  • T2 Request to Readjust the T2 Porsches #27746induction
  • AS Rear Trailing Arms #28007suspension & brakes
  • AS Weight reduction for cars running iron heads #28010weight
  • AS 05-10 Mustang with HR cam classification #28226cars added
  • AS 10-15 Camaro Full Prep classification #28227cars added
  • HP Request for Help for Datsun 1200 #27934induction
  • T2 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs
  • T2 Request for Two Piece Stop Tech Brake Rotors #27582suspension & brakes
  • T2 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added
  • T2 Request for Alternative Brake Kit on Nissan 370Z #27912suspension & brakes
  • T2 2015- Current Ecoboost Mustang #27971weight -100 lbs
  • T2 T2 Mustang #28022tyres & wheels
  • HP Update years for the Mazda2, Honda Fit, & Mini #27782other
  • HP Allow Dry Sump, Limited Prep Porsche 914 #27814other
  • HP Please Allow Alternate Rear Axle Housing for RWD Toyota Corolla #27854other
  • HP Request to List Mazda Miata Throttle Body Size #27907induction
  • HP HP VW Rabbit Convertible 1.6L #1922 and 32mm chokes #27917weight
  • T2 Clarification of On-Board Fire System for T2 #27183wording
  • T2 Mustang Ecoboost and GT Transmission #27439other
  • T2 Request for Dailey Engineering Dry Sump on 2010 Camaro SS #27514engine
  • T2 Request for Half Shafts - 2014 Camaro SS 1LE #27584induction
  • T2 Request for Parity Among Vehicles #27665weight -50 lbs
  • T2 Request for 2016-2020 Camaro SS Help #27776weight -50 lbs
  • T2 Request for Competitive Adjustments to Honda Civic Type R #27839weight -50 lbs
  • T2 T4 RX8 Classification Error #27902wording
  • T2 Request to add Toyota 86 GT to Spec Line #27910other
  • HP Request to Correct Track of 1988-91 Honda Civic #27487wording
  • HP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency #27661engine
Virginia International Raceway Runoffs 20192019-10-051:57.537Cooper I MacNeil · fastest of 19 · top 5 within 3.4s1:58.551Cooper I MacNeil · fastest of 18 · top 5 within 2.4s149.4James Leithauser2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s2:03.900James Jost · fastest of 16 · top 5 within 2.1s153.9James Jost+5.349squal +5.401s104.5%qual 104.6%2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s119.8Jim Drago+17.908squal +17.015s115.1%qual 114.5%2:14.822Steve Sargis · fastest of 29 · top 5 within 1.1s2:15.062Ron Bartell · fastest of 28 · top 5 within 1.2s124.9William Trainer+16.511squal +17.285s113.9%qual 114.7%
41 rule changes (T2: 23, AS: 4, SM: 4, HP: 10)9 suspension & brakes · 8 weight · 7 cars added · 5 tyres & wheels · 3 induction · 1 engine · 3 wording · 5 othershowhide
  • AS Request to add SMG to 9.1.6.B.1 AS Intent #27140other
  • HP Request bodywork for Austin Healey Bugeye Sprite MK1 #27106other
  • HP Request to classify the GMX5 2019 #27263cars added
  • HP level one susp. component rule #27270suspension & brakes
  • HP Clarification of Carb Rules - Prep 1 #27300induction
  • HP Clarification of Carb Rules - Prep 2 #27301induction
  • T2 Request spare tire/wheel clarification #27012tyres & wheels
  • AS Request Ride Height Clarification #26598suspension & brakes
  • HP Request Miata Eligibility - 2003 #27121other
  • T2 Request to change Cadillac CTS-V years from 06-07 to 04-07 #26842cars added
  • T2 Request to allow Hotchkiss front / rear sway bars on T2 CTS-V #26845suspension & brakes
  • T2 Consider T2 06-07 Cadillac CTS-V BoP #27022induction
  • T2 Correct T2 Mustang tire size #27024tyres & wheels
  • AS Request to Revert to 2017 Weights #25885weight
  • T2 2018+ Audi TT RS Suspension Allowances #26631suspension & brakes
  • T2 Request BOP adjustment for 2018 Honda Civic Type R-TIR removal #26882weight +150 lbs
  • HP Rollcenter Correction Clarification #25873tyres & wheels
  • HP Hardtops #26476wording
  • T2 Request for Removal of Rear Anti-roll Bar in T2 Mustang GT #26533suspension & brakes
  • HP Do Something About the Toyota Yaris In H Production #25834weight +130 lbs
  • HP Request to Allow 2011+ Fiesta to Change Bolt Pattern on Wheels #25929tyres & wheels
  • SM Request to allow aftermarket fuel filters. #26370wording
  • T2 Request Mustang GT Limited Prep 2018 Classification #24431cars added
  • T2 Request to Classify 2018 Audi TT RS #25961cars added
  • T2 Request for Adjustments on 2017+ Civic Type R #25969suspension & brakes
  • T2 Correct Mazda MX-5 Hard Top Notes #26137weight
  • T2 Consider opening class rules to allow any thermostat #26187wording
  • T2 Ford Mustang Boss 302 (12-13) - correct weight #26287weight -50 lbs
  • T2 Request camber correction 005-2013 corvette C6 #26288suspension & brakes
  • T2 Request 98-02 Firebird 98-02 Camaro reloacte rear spring #26291suspension & brakes
  • T2 Cap 2016 Mazda Miata year at 2018 #26388other
  • T2 Class Ford Mustang GT 2018+ (reference letter 24431) #26400cars added
  • AS SMG Mustang eligibility in American sedan #26224cars added
  • SM Request 99-00 replacement Wire harnesses #25602engine
  • SM Organize and Clarify 9.1.7.C.1.o. #25913weight
  • SM Strike Tire Tread Language #26123tyres & wheels
  • T2 Errors, Omissions, and Updates (Various) #22414weight
  • T2 Request to classify 2015 Cayman GTS 3.4L in T2 #25335cars added
  • T2 Request for 2017-2018 Honda Civic Type R - 4 BOP Grill #25513other
  • T2 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
  • T2 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes
Sonoma Raceway Runoffs 20182018-10-101:45.032John Kachadurian · fastest of 30 · top 5 within 2.4s1:45.999John Kachadurian · fastest of 28 · top 5 within 3.0s106.5John Kachadurian1:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s105.0Kevin Fandozzi+4.346squal +2.750s104.1%qual 102.6%1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s102.2Danny Steyn+9.279squal +9.323s108.8%qual 108.9%1:54.070Brian Linn · fastest of 16 · top 5 within 2.8s1:54.434Jason Isley · fastest of 16 · top 5 within 3.3s109.3Michael H Miller+8.435squal +9.038s108.0%qual 108.6%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:48.618John M Buttermore · fastest of 26 · top 5 within 0.8s1:48.769John M Buttermore · fastest of 25 · top 5 within 1.2s1:45.220James Jost · fastest of 29 · top 5 within 6.7s1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s+2.738squal -3.398s102.5%qual 96.9%1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+10.331squal +9.688s109.5%qual 108.9%1:57.421Jason Isley · fastest of 46 · top 5 within 0.9s1:57.569Vesa Silegren · fastest of 40 · top 5 within 1.1s+8.800squal +8.803s108.1%qual 108.1%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:31.563Preston Calvert · fastest of 22 · top 5 within 0.5s1:32.691John M Buttermore · fastest of 20 · top 5 within 1.5s1:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s+0.733squal -0.912s100.8%qual 99.0%1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+8.073squal +8.951s108.7%qual 109.8%1:39.954Jason Isley · fastest of 34 · top 5 within 1.5s1:40.442Jason Isley · fastest of 34 · top 5 within 0.4s+7.751squal +8.391s108.4%qual 109.2%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:00.172Kurt Rezzetano · fastest of 20 · top 5 within 3.2s2:01.077Kurt Rezzetano · fastest of 19 · top 5 within 2.8s2:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s+1.845squal +1.574s101.5%qual 101.3%2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+22.990squal +18.489s119.0%qual 115.4%2:17.369Jason Isley · fastest of 18 · top 5 within 2.5s2:17.981Alan (Aj) Hulse · fastest of 17 · top 5 within 1.1s+16.904squal +17.197s114.0%qual 114.3%

By track

TrackEvents Typical % of T2 Best Latest 
Road America4100.0%100.0%Runoffs 2020100.0%Runoffs 2026
Virginia International Raceway3100.0%100.0%Runoffs 2019100.0%Runoffs 2023
Indianapolis Motor Speedway2100.0%100.0%Runoffs 2017100.0%Runoffs 2021
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%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 T2'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.