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BoP Lab / Classes / FE2

FE2 vs T4 vs SM vs T3 pace at every track

Lap times across years say as much about the weather as the class. % of FE2 is each class's best lap as a share of FE2'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)
ASB-SpecEPFAFCFE2×FFFPFVFXGT1GT2GTXHPPP2vsSM×SMXSRF3STLSTUT1T2vsT3×vsT4×Show 51 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: FE2 100.0% of FE2 Flinn Lazier, Sonoma Raceway Runoffs 2018 race · T4 110.1% of FE2 John Heinricy, Virginia International Raceway Runoffs 2022 race · SM 105.3% of FE2 Travis Wiley, Virginia International Raceway Runoffs 2022 race · T3 74.3% of FE2 Mark Drennan, Sonoma Raceway Runoffs 2018 qualifying

1:402:002:202:4048 rule changes between Runoffs 2018 and Runoffs 201948 ▾55 rule changes between Runoffs 2019 and Runoffs 202055 ▾40 rule changes between Runoffs 2020 and Runoffs 202140 ▾61 rule changes between Runoffs 2021 and Runoffs 202261 ▾49 rule changes between Runoffs 2022 and Runoffs 202349 ▾73 rule changes between Runoffs 2023 and Runoffs 202473 ▾58 rule changes between Runoffs 2024 and Runoffs 202558 ▾61 rule changes between Runoffs 2025 and Runoffs 202661 ▾FE2 race best at Runoffs 2018: 1:35.563 (Flinn Lazier)FE2 race best at Runoffs 2019: 1:52.154 (Liam Snyder)FE2 race best at Runoffs 2020: 2:13.271 (Owen McAllister)FE2 race best at Runoffs 2021: 1:36.655 (Max Grau)FE2 race best at Runoffs 2022: 2:12.045 (Jason Conzo)FE2 race best at Runoffs 2023: 1:51.098 (Franklin Futrelle)FE2 race best at Runoffs 2024: 2:12.748 (Porter Aiken)FE2 race best at Runoffs 2025: 2:13.339 (Franklin Futrelle)FE2 race best at Runoffs 2026: 2:11.881 (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 1:35.040 (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 1:51.062 (Liam Snyder)FE2 qualifying best at Runoffs 2020: 2:12.806 (Scott Rettich)FE2 qualifying best at Runoffs 2021: 1:36.395 (Max Grau)FE2 qualifying best at Runoffs 2022: 1:50.853 (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 1:50.665 (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 2:11.506 (Porter Aiken)FE2 qualifying best at Runoffs 2025: 2:12.475 (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 2:12.326 (Franklin Futrelle)T4 race best at Runoffs 2015: 2:15.994 (Philip Royle)T4 race best at Runoffs 2016: 1:40.397 (Oscar Jackson)T4 race best at Runoffs 2017: 1:56.923 (Oscar Jackson)T4 race best at Runoffs 2018: 1:54.030 (John Heinricy)T4 race best at Runoffs 2019: 2:10.959 (Nick Leverone)T4 race best at Runoffs 2020: 2:37.881 (Chi Ho)T4 race best at Runoffs 2021: 1:55.929 (John Heinricy)T4 race best at Runoffs 2022: 2:25.443 (John Heinricy)T4 race best at Runoffs 2023: 2:11.962 (Devin Anderson)T4 race best at Runoffs 2024: 2:34.208 (Alex Lozano)T4 race best at Runoffs 2025: 2:32.633 (Alex Lozano)T4 race best at Runoffs 2026: 2:35.757 (Matt Spicuzzi)T4 qualifying best at Runoffs 2015: 2:15.886 (Philip Royle)T4 qualifying best at Runoffs 2016: 1:38.813 (Jonathan Yanca)T4 qualifying best at Runoffs 2017: 1:56.566 (Oscar Jackson)T4 qualifying best at Runoffs 2018: 1:52.339 (Gresham Wagner)T4 qualifying best at Runoffs 2019: 2:11.257 (John Heinricy)T4 qualifying best at Runoffs 2020: 2:37.403 (John Heinricy)T4 qualifying best at Runoffs 2021: 1:54.397 (Stephen Blethen)T4 qualifying best at Runoffs 2022: 2:09.577 (John Heinricy)T4 qualifying best at Runoffs 2023: 2:10.514 (Devin Anderson)T4 qualifying best at Runoffs 2024: 2:34.430 (Matt Spicuzzi)T4 qualifying best at Runoffs 2025: 2:32.956 (Matt Spicuzzi)T4 qualifying best at Runoffs 2026: 2:35.876 (Matt Spicuzzi)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)T3 race best at Runoffs 2015: 2:08.363 (Tom Wickersham)T3 race best at Runoffs 2016: 1:37.371 (Robert Schader)T3 race best at Runoffs 2017: 1:53.286 (Charles Hurley)T3 race best at Runoffs 2018: 1:49.610 (Mark Drennan)T3 race best at Runoffs 2019: 2:05.354 (Broderick Bauguess)T3 race best at Runoffs 2020: 2:31.688 (Marshall Mast)T3 race best at Runoffs 2021: 1:52.701 (Breton Williams)T3 race best at Runoffs 2022: 2:27.626 (Marshall Mast)T3 race best at Runoffs 2023: 2:05.854 (Chris Hart)T3 race best at Runoffs 2024: 2:29.191 (Marshall Mast)T3 race best at Runoffs 2025: 2:29.898 (Marshall Mast)T3 race best at Runoffs 2026: 2:27.540 (Scotty B White)T3 qualifying best at Runoffs 2015: 2:08.573 (Scotty B White)T3 qualifying best at Runoffs 2016: 1:36.741 (Charles Hurley)T3 qualifying best at Runoffs 2017: 1:52.214 (Rob Hines)Off the chart: T3 qualifying best at Runoffs 2018: 1:10.656 (Mark Drennan)T3 qualifying best at Runoffs 2019: 2:04.918 (Marshall Mast)T3 qualifying best at Runoffs 2020: 2:29.757 (Marshall Mast)T3 qualifying best at Runoffs 2021: 1:51.591 (Marshall Mast)T3 qualifying best at Runoffs 2022: 2:04.223 (Jason Ott)T3 qualifying best at Runoffs 2023: 2:04.520 (Steve Ott)T3 qualifying best at Runoffs 2024: 2:25.450 (Scotty B White)T3 qualifying best at Runoffs 2025: 2:28.676 (Nic Hammann)T3 qualifying best at Runoffs 2026: 2:27.890 (Nic Hammann)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
FE2T4SMT3solid race · dashed qualifying · slower is lower
100%105%110%115%120%125%48 rule changes between Runoffs 2018 and Runoffs 201948 ▾55 rule changes between Runoffs 2019 and Runoffs 202055 ▾40 rule changes between Runoffs 2020 and Runoffs 202140 ▾61 rule changes between Runoffs 2021 and Runoffs 202261 ▾49 rule changes between Runoffs 2022 and Runoffs 202349 ▾73 rule changes between Runoffs 2023 and Runoffs 202473 ▾58 rule changes between Runoffs 2024 and Runoffs 202558 ▾61 rule changes between Runoffs 2025 and Runoffs 202661 ▾FE2 race best at Runoffs 2018: 100.0% of FE2's (Flinn Lazier)FE2 race best at Runoffs 2019: 100.0% of FE2's (Liam Snyder)FE2 race best at Runoffs 2020: 100.0% of FE2's (Owen McAllister)FE2 race best at Runoffs 2021: 100.0% of FE2's (Max Grau)FE2 race best at Runoffs 2022: 100.0% of FE2's (Jason Conzo)FE2 race best at Runoffs 2023: 100.0% of FE2's (Franklin Futrelle)FE2 race best at Runoffs 2024: 100.0% of FE2's (Porter Aiken)FE2 race best at Runoffs 2025: 100.0% of FE2's (Franklin Futrelle)FE2 race best at Runoffs 2026: 100.0% of FE2's (Franklin Futrelle)FE2 qualifying best at Runoffs 2018: 100.0% of FE2's (Flinn Lazier)FE2 qualifying best at Runoffs 2019: 100.0% of FE2's (Liam Snyder)FE2 qualifying best at Runoffs 2020: 100.0% of FE2's (Scott Rettich)FE2 qualifying best at Runoffs 2021: 100.0% of FE2's (Max Grau)FE2 qualifying best at Runoffs 2022: 100.0% of FE2's (Charles Russell Turner)FE2 qualifying best at Runoffs 2023: 100.0% of FE2's (Charles Russell Turner)FE2 qualifying best at Runoffs 2024: 100.0% of FE2's (Porter Aiken)FE2 qualifying best at Runoffs 2025: 100.0% of FE2's (Franklin Futrelle)FE2 qualifying best at Runoffs 2026: 100.0% of FE2's (Franklin Futrelle)T4 race best at Runoffs 2018: 119.3% of FE2's (John Heinricy)T4 race best at Runoffs 2019: 116.8% of FE2's (Nick Leverone)T4 race best at Runoffs 2020: 118.5% of FE2's (Chi Ho)T4 race best at Runoffs 2021: 119.9% of FE2's (John Heinricy)T4 race best at Runoffs 2022: 110.1% of FE2's (John Heinricy)T4 race best at Runoffs 2023: 118.8% of FE2's (Devin Anderson)T4 race best at Runoffs 2024: 116.2% of FE2's (Alex Lozano)T4 race best at Runoffs 2025: 114.5% of FE2's (Alex Lozano)T4 race best at Runoffs 2026: 118.1% of FE2's (Matt Spicuzzi)T4 qualifying best at Runoffs 2018: 118.2% of FE2's (Gresham Wagner)T4 qualifying best at Runoffs 2019: 118.2% of FE2's (John Heinricy)T4 qualifying best at Runoffs 2020: 118.5% of FE2's (John Heinricy)T4 qualifying best at Runoffs 2021: 118.7% of FE2's (Stephen Blethen)T4 qualifying best at Runoffs 2022: 116.9% of FE2's (John Heinricy)T4 qualifying best at Runoffs 2023: 117.9% of FE2's (Devin Anderson)T4 qualifying best at Runoffs 2024: 117.4% of FE2's (Matt Spicuzzi)T4 qualifying best at Runoffs 2025: 115.5% of FE2's (Matt Spicuzzi)T4 qualifying best at Runoffs 2026: 117.8% of FE2's (Matt Spicuzzi)SM race best at Runoffs 2018: 120.6% of FE2's (Michael Carter)SM race best at Runoffs 2019: 121.7% of FE2's (Elivan Goulart)SM race best at Runoffs 2020: 122.9% of FE2's (Preston Pardus)SM race best at Runoffs 2021: 122.9% of FE2's (Brian Henderson)SM race best at Runoffs 2022: 105.3% of FE2's (Travis Wiley)SM race best at Runoffs 2023: 122.6% of FE2's (Julian DaCosta)SM race best at Runoffs 2024: 121.6% of FE2's (Brett Kowalski)SM race best at Runoffs 2025: 123.3% of FE2's (Kyle Greenhill)SM race best at Runoffs 2026: 123.4% of FE2's (Francisco Barroso)SM qualifying best at Runoffs 2018: 120.3% of FE2's (Ken Sutherland)SM qualifying best at Runoffs 2019: 121.2% of FE2's (Todd Buras)SM qualifying best at Runoffs 2020: 122.1% of FE2's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 122.1% of FE2's (Brian Henderson)SM qualifying best at Runoffs 2022: 121.5% of FE2's (Danny Steyn)SM qualifying best at Runoffs 2023: 122.0% of FE2's (Danny Steyn)SM qualifying best at Runoffs 2024: 122.5% of FE2's (Ethan Goulart)SM qualifying best at Runoffs 2025: 123.1% of FE2's (Bobby Gossett)SM qualifying best at Runoffs 2026: 122.6% of FE2's (Brett Kowalski)T3 race best at Runoffs 2018: 114.7% of FE2's (Mark Drennan)T3 race best at Runoffs 2019: 111.8% of FE2's (Broderick Bauguess)T3 race best at Runoffs 2020: 113.8% of FE2's (Marshall Mast)T3 race best at Runoffs 2021: 116.6% of FE2's (Breton Williams)T3 race best at Runoffs 2022: 111.8% of FE2's (Marshall Mast)T3 race best at Runoffs 2023: 113.3% of FE2's (Chris Hart)T3 race best at Runoffs 2024: 112.4% of FE2's (Marshall Mast)T3 race best at Runoffs 2025: 112.4% of FE2's (Marshall Mast)T3 race best at Runoffs 2026: 111.9% of FE2's (Scotty B White)Off the chart: T3 qualifying best at Runoffs 2018: 74.3% of FE2's (Mark Drennan)T3 qualifying best at Runoffs 2019: 112.5% of FE2's (Marshall Mast)T3 qualifying best at Runoffs 2020: 112.8% of FE2's (Marshall Mast)T3 qualifying best at Runoffs 2021: 115.8% of FE2's (Marshall Mast)T3 qualifying best at Runoffs 2022: 112.1% of FE2's (Jason Ott)T3 qualifying best at Runoffs 2023: 112.5% of FE2's (Steve Ott)T3 qualifying best at Runoffs 2024: 110.6% of FE2's (Scotty B White)T3 qualifying best at Runoffs 2025: 112.2% of FE2's (Nic Hammann)T3 qualifying best at Runoffs 2026: 111.8% of FE2's (Nic Hammann)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
FE2T4SMT3solid race · dashed qualifying · each class's best lap as a share of FE2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventFE2T4SMT3
Qual best Race best Trap Qual best Race best Trap vs FE2 % of FE2 Qual best Race best Trap vs FE2 % of FE2 Qual best Race best Trap vs FE2 % of FE2 
Road America Runoffs 20262026-09-282:12.326Franklin Futrelle · fastest of 8 · top 5 within 1.9s-0.149s (-0.11%)2:11.881Franklin Futrelle · fastest of 8 · top 5 within 1.6s-1.458s (-1.09%)143.5Steve Whitston-5.5 mph (-3.7%)2:35.876Matt Spicuzzi · fastest of 12 · top 5 within 2.4s+2.920s (+1.91%)2:35.757Matt Spicuzzi · fastest of 12 · top 5 within 2.7s+3.124s (+2.05%)127.6Matt Spicuzzi-6.0 mph (-4.5%)+23.876squal +23.550s118.1%qual 117.8%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%)+30.844squal +29.847s123.4%qual 122.6%2:27.890Nic Hammann · fastest of 12 · top 5 within 4.0s-0.786s (-0.53%)2:27.540Scotty B White · fastest of 12 · top 5 within 4.8s-2.358s (-1.57%)138.4Nic Hammann+0.2 mph (+0.2%)+15.659squal +15.564s111.9%qual 111.8%
61 rule changes (FE2: 1, T4: 26, SM: 2, T3: 32)13 weight · 11 suspension & brakes · 9 tyres & wheels · 7 cars added · 5 induction · 2 removed · 1 aero · 1 wording · 12 othershowhide
  • T3 T3 Subaru STI 2015-2021 #40708weight
  • T4 02-06 R53 Mini Cooper Hotchkins Rear Camber Arms #40677suspension & brakes
  • T3 Porsche 986 Boxster S (00-04) Spec Line Additions for Suspension #40307suspension & brakes
  • T3 Allow a Change in Rear Axle #40507other
  • T4 Is it time? #40653cars added
  • T4 Combine T4 BRZ/86/FRS generations #40656weight
  • SM Rear Toe Link #40271other
  • T3 Ford FR500S #40031cars added
  • T3 Audi S4 T3 #40241suspension & brakes
  • T3 VW DSG Missing in 2015-2018 VW Golf R Spec Line #40304weight
  • T4 Dodge Neon DOHC Weight #40329weight
  • T3 2015+ Mustang Ecoboost Performance #40036suspension & brakes
  • T3 Review Spec Lines for Camaro V-6 #40149removed -150 lbs
  • T3 Power of GR86/BRZ in T3 #40169weight -225 lbs
  • T3 Allow T3 Ford Mustang 4.6 to Use the Coyote MT-82 6 speed. #40190other
  • T3 Porsche 986S Boxster S (2000-2004) Minimum Weight #40196weight
  • T4 SPB In T4 #39973other
  • T4 02-06 Mini Cooper S #40106weight -50 lbs
  • T4 02-06 Mini Cooper S Fuel #40107other
  • T4 Shock error #40176suspension & brakes
  • T4 Max Tire Sizes #40183tyres & wheels
  • T3 2019 Mustang 2.3L Ecoboost Request #39935weight -50 lbs
  • T3 2013 Audi S4 #39983induction
  • T3 Request Update to T3 Camaro V6 (10-15) Spec Line #40007tyres & wheels
  • T3 S550 Mustang 3.7 #40010aero
  • T4 2003 Honda Civic Si Classification #39999cars added
  • SM Part Number Change Request #39914wording
  • T3 350Z #39843induction
  • T4 16-24 ND MX5 T4 #39934suspension & brakes
  • T3 Nissan 370Z Tire Size #39701tyres & wheels
  • T3 986 Boxster S Wheel Width #39819tyres & wheels
  • T3 Request Update to T3 Camaro V6 (10-15) Spec Line #39839tyres & wheels
  • T3 Audi S4 #39870cars added
  • T4 ND MX-5 Spec Line Rewrite Request #39802weight -100 lbs
  • T4 4.0 Mustang spec line cleanup #39831induction
  • T3 Please change 2011-2014 Mustang V6 Spec Line to 2005-2014 #39558other
  • T3 Nissan 350Z Weight Request #39598weight -25 lbs
  • T3 Allow Alt Bushing Material in Toe Links #39607suspension & brakes
  • T4 T4 and T3 Feedback #39230removed
  • T4 T4 Mustang 4.0 #39489induction
  • T4 Allow Alt Bushing Material in Toe Links #39607suspension & brakes
  • T3 Request to Allow Spec Mustang to Touring 3 in Appendix M Trim #39196weight -50 lbs
  • T3 Tire Help for Spec E9X in T3 #39222tyres & wheels
  • T3 SpecE46 Tire Sizing #39292tyres & wheels
  • T3 Alternate Placement of Fuse Panel and Electronics Request #39370other
  • T3 Clarify T4 Brake Rotor Allowance #39503suspension & brakes
  • T4 Alternate Placement of Fuse Panel and Electronics Request #39370other
  • T4 Clarify T4 Brake Rotor Allowance #39503suspension & brakes
  • T3 T3 Ecoboost Mustang clarification #39236suspension & brakes
  • T4 Classing 1995-99 Dodge Neon SOHC #39285cars added
  • T3 Make the S2000 Competitive Again #38470tyres & wheels
  • T3 ND Gearset Request for T4 #39166other
  • T3 ND Spec Lines Wrong PT#'s #39170weight
  • T4 02-06 Mini Cooper Gear Ratios #38966other
  • T4 Reinstatement of the 2005-2010 Cobalt into T4 #38987cars added
  • T4 Request to Classify Mercedes C230K #39080cars added
  • T4 ND Gearset Request for T4 #39166other
  • T4 E&O wheel size on ND #39168tyres & wheels
  • T4 ND Spec Lines Wrong PT#'s #39170weight
  • T4 Touring 4 Post-Runoffs BOP Adjustments and Changes #39251induction -100 lbs
  • FE2 FE & FE2 Bubble Tail #38978other
Road America Runoffs 20252025-09-292:12.475Franklin Futrelle · fastest of 11 · top 5 within 1.4s+0.969s (+0.74%)2:13.339Franklin Futrelle · fastest of 10 · top 5 within 0.6s+0.591s (+0.45%)149.0Steve Whitston+3.7 mph (+2.6%)2:32.956Matt Spicuzzi · fastest of 10 · top 5 within 3.8s-1.474s (-0.95%)2:32.633Alex Lozano · fastest of 10 · top 5 within 4.3s-1.575s (-1.02%)133.7Alex Lozano+4.4 mph (+3.4%)+19.294squal +20.481s114.5%qual 115.5%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%)+31.091squal +30.636s123.3%qual 123.1%2:28.676Nic Hammann · fastest of 19 · top 5 within 1.8s+3.226s (+2.22%)2:29.898Marshall Mast · fastest of 19 · top 5 within 2.9s+0.707s (+0.47%)138.2Marshall Mast-13.0 mph (-8.6%)+16.559squal +16.201s112.4%qual 112.2%
58 rule changes (FE2: 1, T4: 29, SM: 4, T3: 24)11 cars added · 9 weight · 7 tyres & wheels · 5 induction · 4 engine · 4 suspension & brakes · 1 aero · 6 wording · 11 othershowhide
  • T3 Incorrect Touring Heading #38451wording
  • T4 Incorrect Touring Heading #38451wording
  • T3 correct letter 37421 #38204wording
  • T4 Allow B-Spec cars to run in T4 #38439other
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • T4 T4 Mustang #38059weight -100 lbs
  • T4 SSC tire allowance #38216tyres & wheels
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • T3 S550 Mustang #38061weight -50 lbs
  • T3 correct letter 37421 #38204wording
  • T4 Correct Ring and Pinion Ratio to T3, Sorry I Mean T4 3.7 V6 Stang #38041wording
  • T4 T4 Mustang #38058aero
  • FE2 Driver Safety & Comfort #37965other
  • T3 SpecE46 Tire Change #37421tyres & wheels
  • T3 S197 Mustang V6 in T3 #37594weight -25 lbs
  • T3 350z BOP #37427induction
  • T3 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added
  • T4 Ford Mustang V6 (05-14) #37516other
  • T4 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added
  • T3 Remove spec lines that have expired #37269induction
  • T3 Request to Move Spec Mustang to Touring 3 (from T2) #37080cars added
  • T3 3.7 Mustangs BoP #37186induction
  • T4 Remove spec lines that have expired #37269induction
  • T4 2016-2018 Mazda Miata MX5 #37085weight -75 lbs
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • T3 Amend TIR Placement on VW #36175induction
  • T3 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes
  • T3 Fuel Emissions Components #37076engine
  • T3 fix brake wording #37129suspension & brakes
  • T3 Evaporative emissions systems #37130engine
  • T3 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision #37140other
  • T3 Move Spec Boxster to T4 #37158cars added
  • T3 BMW 320i Spec Line #37204other
  • T3 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added
  • T3 Request to Classify BMWs #37226cars added
  • T3 Make adjustments to the 2015 STI Spec line #37246tyres & wheels
  • T3 class a civic #37294cars added
  • T3 Older STI in T3 #37300weight -100 lbs
  • T4 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes
  • T4 R53 Mini Cooper S Weight Reduction Request #36612weight
  • T4 Allowable Wheel Offset #36855tyres & wheels
  • T4 Fuel Emissions Components #37076engine
  • T4 2019-2024 Mazda 3 for T4 #37077cars added
  • T4 fix brake wording #37129suspension & brakes
  • T4 Evaporative emissions systems #37130engine
  • T4 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision #37140other
  • T4 Move Spec Boxster to T4 #37158cars added
  • T4 3.7 Mustangs to T4 #37188cars added
  • T4 BMW 320i Spec Line #37204other
  • T4 MX5 2006-2015 NC Help #37221other
  • T4 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added
  • T4 Civic SI in T4 #37248weight -50 lbs
  • T4 2006-2015 T4 NC Mx5 spec line #37278weight
  • T4 ND MX-5 wheel allowance #37279tyres & wheels
  • T4 T4 BOP #37281weight +75 lbs
  • T4 Allow 7.5 #37286tyres & wheels
  • T4 Bop Request 06-11 Honda Civic Si #37013other
Road America Runoffs 20242024-10-012:11.506Porter Aiken · fastest of 18 · top 5 within 0.5s-1.300s (-0.98%)2:12.748Porter Aiken · fastest of 17 · top 5 within 2.0s-0.523s (-0.39%)145.3Porter Aiken+1.9 mph (+1.3%)2:34.430Matt Spicuzzi · fastest of 15 · top 5 within 1.8s-2.973s (-1.89%)2:34.208Alex Lozano · fastest of 14 · top 5 within 2.2s-3.673s (-2.33%)129.3Alex Lozano-0.9 mph (-0.7%)+21.460squal +22.924s116.2%qual 117.4%2:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)119.9Alex Bertagnoli-1.4 mph (-1.2%)+28.738squal +29.600s121.6%qual 122.5%2:25.450Scotty B White · fastest of 22 · top 5 within 4.5s-4.307s (-2.88%)2:29.191Marshall Mast · fastest of 21 · top 5 within 1.8s-2.497s (-1.65%)151.2Scotty B White+13.1 mph (+9.5%)+16.443squal +13.944s112.4%qual 110.6%
73 rule changes (T4: 28, SM: 4, T3: 41)17 weight · 12 induction · 11 suspension & brakes · 7 cars added · 3 engine · 2 aero · 2 tyres & wheels · 1 removed · 1 wording · 17 othershowhide
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • T3 Honda Civic Si (2017+) #36249weight
  • T3 Subaru Reliability Help #36284other
  • T3 spec line for 36073 #36338cars added
  • T3 36131 #36339cars added
  • T4 T4 Camaro V6 weight reduction #36232weight
  • T4 BOP adjustment for ND MX5s #36345weight -50 lbs
  • T3 Mustang T2/T3 #35877other
  • T3 T2-T4 Driveshaft Mistake...? #36050weight
  • T3 E&O: #35174 (Derek Chan) 350Z Parity Request #36116induction
  • T3 B8/8.5 Audi S4 T3 and T2 #36195cars added
  • T3 Z4 Roadster Eligibility #36196other
  • T4 Mustang T2/T3 #35877other
  • T4 Homologation of car to T4 #36030cars added
  • T4 T2-T4 Driveshaft Mistake...? #36050weight
  • T4 MINI Cooper S Spec Lines Corrections. #36086removed
  • T4 Allow Removal of Sound Tubes #36130induction
  • T4 B8/8.5 Audi S4 T3 and T2 #36195cars added
  • T3 Global MX5 Tre change #36046tyres & wheels
  • T4 Allow OEM Front Spoiler 06-08 Miata in T4 #35941aero
  • T4 T4 Mustang Weight Reduction In T4 Spec #36051weight -50 lbs
  • T4 R53 Mini Cooper S spec line request In #36056suspension & brakes
  • T3 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine
  • T3 Driveshafts #35916weight
  • T3 Audi S4 HST requirement #35918other
  • T4 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine
  • T4 2023 ND2 Miata Classification and Allowances #35837weight
  • T4 Errors and Omissions for 06-09 VW Rabbit Rotor #35851suspension & brakes
  • T4 Driveshafts #35916weight
  • T4 GCR ERROR - letter not properly applied to GCR #35999weight
  • T4 Corrections to T4 RX8 Spec line #35767aero
  • T3 Spec Z Interchange in T3 #34416induction
  • T3 please classify 2000-2002 Audi s4 #35306cars added
  • T3 Reorganize Spec Lines #35375induction
  • T3 370Z Brake Rotor Size Correction #35487suspension & brakes
  • T3 T3 V6 Mustang help #35526induction
  • T3 Nissan 370Z - Brake System Allowance - Brake Booster #35556suspension & brakes
  • T3 Mustang Help #35559induction
  • T3 Appeal for Retention of T3 Mazda RX-8 Spec Line (Letter #35378) #35577other
  • T3 Request to Keep the Mazda Rx-8 in Touring 3 #35584other
  • T3 Subaru WRX (02-05) Appeal #35656other
  • T4 Reorganize Spec Lines #35375induction
  • T4 Allow any 400lb rear spring in the RX8 #35433suspension & brakes
  • T4 370Z Brake Rotor Size Correction #35487suspension & brakes
  • T3 15-18 Golf R Alignment with Existing GTI and R Speclines #35235tyres & wheels
  • T3 More Car Lightening Stuff #35319weight
  • T3 Open Strut Tower Brace Options for Ford Mustang V6 (11-14) #35322suspension & brakes
  • T3 Mustang ecoboost #35351induction
  • T3 Inclusion of B-C spec cars in T4 #35374other
  • T3 T2-T4 Set expiration dates on spec lines #35378induction
  • T4 More Car Lightening Stuff #35319weight
  • T4 ND Missed Items #35352other
  • T4 Inclusion of B-C spec cars in T4 #35374other
  • T4 T2-T4 Set expiration dates on spec lines #35378induction
  • T3 T3 Solstice Brakes #35106suspension & brakes
  • T3 350Z Parity Request #35174weight
  • T3 Requested Update of Model Years of 370Z #35231other
  • T3 Update Request for 2010 Mustang GT 4.6 #35234other
  • T3 SE46 Continued Parity/ Cold Air Intake request #35267induction -50 lbs
  • T3 Please help the Subaru STIs. #35278weight +100 lbs
  • T4 Mazda MX-5 ND1 Spec Line Request #34232weight +50 lbs
  • T4 BRZ/FRS/86 Spring Allowance #35038suspension & brakes
  • T4 TSX Allowance #35219other
  • T4 Requested Update of Model Years of 370Z #35231other
  • T3 Porsche Cayman Transmissions and Ratios #34891weight
  • T3 2006-10 Volkswagen GTI - Weight Reduction request and KO4 Turbo #34414weight
  • T3 Adding Model Years to T3 Golf R Spec Line #34612other
  • T3 Rear Camber Arms for T3 VW Golf R #34613suspension & brakes
  • T3 Classing Spec E90 Cars in SCCA #34791cars added
  • T3 TIR location requirement in VW Golf Spec lines #35048induction
Virginia International Raceway Runoffs 20232023-09-231:50.665Charles Russell Turner · fastest of 26 · top 5 within 2.3s-0.188s (-0.17%)1:51.098Franklin Futrelle · fastest of 19 · top 5 within 1.4s-20.947s (-15.86%)141.3Franklin Futrelle-0.6 mph (-0.4%)2:10.514Devin Anderson · fastest of 24 · top 5 within 0.5s+0.937s (+0.72%)2:11.962Devin Anderson · fastest of 23 · top 5 within 0.1s-13.481s (-9.27%)127.8Raymond Blethen+0.5 mph (+0.4%)+20.864squal +19.849s118.8%qual 117.9%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%)+25.131squal +24.321s122.6%qual 122.0%2:04.520Steve Ott · fastest of 18 · top 5 within 1.9s+0.297s (+0.24%)2:05.854Chris Hart · fastest of 18 · top 5 within 1.8s-21.772s (-14.75%)139.1Jason Ott-1.1 mph (-0.8%)+14.756squal +13.855s113.3%qual 112.5%
49 rule changes (T4: 20, SM: 1, T3: 28)16 weight · 6 cars added · 6 suspension & brakes · 5 tyres & wheels · 2 induction · 1 removed · 3 wording · 10 othershowhide
  • T4 Inclusion of similar car. (CLK 320) #34626other
  • T3 2012-2013 Golf R - added to T3 #34413cars added
  • T3 Rules Clarification for Mazda RX8 Spec Line #34395weight
  • T3 rule book corrections #34437wording
  • T3 Allowing 255 Tire Width for Nissan 350z #34471tyres & wheels
  • T3 Ride Height Correction for the T3 Solstice. #34615suspension & brakes
  • T4 Rules Clarification for Mazda RX8 Spec Line #34395weight
  • T4 rule book corrections #34437wording
  • T4 Ride Height Correction for the T3 Solstice. #34615suspension & brakes
  • T3 2016+ Camaro 1LE - Max Wheel Diameter #34003tyres & wheels
  • T3 2022 Toyota GR Cup for T3 #34448removed
  • T4 2002-2006 Mini Cooper S R53 Spec Line Request #34336weight -50 lbs
  • T3 S550 Reconcile With S197 #34093weight -75 lbs
  • T3 SE46 Parity Help #34178weight -50 lbs
  • T3 2022 Toyota GR Cup for T3 discussion #34234cars added
  • T4 05-06 Mini Wheel Weight #34112weight
  • T4 06-09 VW Rabbit #34153induction
  • T4 96-01 Audi a4 2.8 Spring Rate #34217suspension & brakes
  • T3 Request Spec E46 in T3 Weight Adjustment #33897weight -25 lbs
  • T3 E36 2.5L 323is Weight Reduction #33975weight
  • T3 Update SpecE46 Spec Line to Current SpecE46 Ruleset #34016other
  • T3 Request to all ECS Tuning inner-cooler to 06-10 VW GTI spec #33769other
  • T4 Request to Classify 2004-2008 Acura TSX in T4 #33590cars added
  • T4 T4 Mustang Brakes/Swaybar #34036suspension & brakes
  • T3 T3 Boxster S GCR request #33687tyres & wheels
  • T3 OEM VW Steering Spindle Replacements 06-10 VW GTI and Jetta #33732other
  • T3 BMW 320I intercooler #33762other
  • T4 BMW 320I intercooler #33762other
  • T3 Request to classify 2014 Base Cayman #33159cars added
  • T3 Mustang OEM Grill Request #33333other
  • T3 Hyundai Classification #33498cars added
  • T3 Adjustable Rear Camber Arms for VW (All Generations) #33572suspension & brakes
  • T4 2019-2021 Mazda MX5 ND2 #32027cars added
  • T4 Mustang OEM Grill Request #33333other
  • T4 Mazda OEM LSD was letter 32655 typo #33666wording
  • SM BOP for NB1 and NB2 #32309weight
  • T3 350z SPC Upper Control Arm Safety Concerns #33020weight
  • T3 Request Help for 350z #33379weight -100 lbs
  • T3 Ecoboost Acknowledgement #33506induction
  • T3 Touring (T2-T5) Category #33617tyres & wheels
  • T3 ENO 9.1.9.2.D.1.e.1.a. #33651other
  • T4 Allowable Springs and Sway Bars for 06-11 Civic si Spec Line #33294suspension & brakes
  • T4 Touring (T2-T5) Category #33617tyres & wheels
  • T4 ENO 9.1.9.2.D.1.e.1.a. #33651other
  • T3 Solstice GXP in T3 #33501weight
  • T4 T4 mustang #32789weight -25 lbs
  • T4 Mazda OEM LSD was letter 32655 #32933weight -25 lbs
  • T3 Another 2022 BRZ/86 T3 request #32945weight +225 lbs
  • T4 Another 2022 BRZ/86 T3 request #32945weight +225 lbs
Virginia International Raceway Runoffs 20222022-09-241:50.853Charles Russell Turner · fastest of 25 · top 5 within 1.1s-0.209s (-0.19%)2:12.045Jason Conzo · fastest of 22 · top 5 within 1.8s+19.891s (+17.74%)141.9Eric Cruz-0.6 mph (-0.5%)2:09.577John Heinricy · fastest of 18 · top 5 within 0.7s-1.680s (-1.28%)2:25.443John Heinricy · fastest of 18 · top 5 within 2.5s+14.484s (+11.06%)127.4Nick Leverone-1.5 mph (-1.2%)+13.398squal +18.724s110.1%qual 116.9%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%)+7.062squal +23.811s105.3%qual 121.5%2:04.223Jason Ott · fastest of 20 · top 5 within 2.1s-0.695s (-0.56%)2:27.626Marshall Mast · fastest of 19 · top 5 within 4.1s+22.272s (+17.77%)140.2Jason Ott+2.0 mph (+1.4%)+15.581squal +13.370s111.8%qual 112.1%
61 rule changes (T4: 29, SM: 1, T3: 31)14 weight · 13 suspension & brakes · 7 cars added · 6 tyres & wheels · 3 engine · 3 induction · 1 aero · 1 removed · 5 wording · 8 othershowhide
  • T3 S2000 Hard Top Clarification #32779wording
  • T3 T3 Pontiac Solstice- #33081induction
  • T4 04-09 Mazda3 Balance Shaft Delete Kit #32795other
  • T3 Classify Car #32691cars added
  • T3 2022 BRZ Sway bar and lip spoiler. #32703aero
  • T4 Request Wider Wheels for Hyundai Tiburon #32536tyres & wheels
  • T3 correct wording #31750weight
  • T3 2005-2008 Porsche Boxster 2.7 #31999cars added
  • T3 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes
  • T3 2022 Subaru BRZ and Toyota 86 twins #32483weight
  • T4 Request to Add Spec Line for 2004-2009 Mazda3 i 2.0 #32395weight
  • T4 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • T3 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine
  • T3 T3 Mustang V8/V6 #31959weight -50 lbs
  • T3 Subaru STI (15-20) Missing part #32294other
  • T4 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine
  • T4 Request JWT BSR Kit for 02-06 Nissan Sentra SE-R/Spec V #31685other
  • T4 Please Confirm Touring 4 (98-00) BMW 323 is E46 generation #31972other
  • T4 RX-8 Spring Part Numbers (E&O) #32151suspension & brakes
  • T4 04-09 Mazda3 Tire Limit Clarification #32249tyres & wheels
  • T4 Shock Part Number Errors & Omissions #32252suspension & brakes
  • T4 Update Solo Spec Coupe to latest '20 specs for Road Racing #32262other
  • T4 Request 2016 Mazda MX5 springs #32265suspension & brakes
  • T3 Touring 3 BOP adjustments for 2022 #31481weight +75 lbs
  • T3 BMW 330i Minimum Comp Weight #31606weight -60 lbs
  • T3 Adjust T3 370Z #31748weight +50 lbs
  • T3 TIR changes for FWD T3 models #31825induction
  • T3 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes
  • T3 BRZ vs BRZ TS #32022tyres & wheels
  • T3 Remove StopTech 4 piston BBK, allow any 4 Piston Kit - VW GTI #33082weight
  • T4 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes
  • T4 BRZ vs BRZ TS #32022tyres & wheels
  • T4 MX-5 Durability Detailed #31102weight
  • T4 Request Allowances for 2005 - 2010 Mustang #31624wording
  • T3 Request FRS/BRZ/86 T3 Weight Reduction #30818weight -75 lbs
  • T3 Request to Classify 2022 Toyota 86 / Subaru in T3 & T4 #30931cars added
  • T3 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes
  • T3 Please Adjust Years Allowed for BMW 335i to 07-10, not 08-13 #31530other
  • T3 Please Adjust Years Allowed for BMW 135i to 08-10, not 08-13 #31531other
  • T3 Request to clarify radiator hoses #31682wording
  • T3 T3 Nissan Z Suspension Update #31728other
  • T3 Clarify Permitted/Allowed #31743suspension & brakes
  • T4 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes
  • T4 Please Adjust 98-00 BMW 323 Min Weight to Reflect Current Class #31595weight -200 lbs
  • T4 Consolidate 12-13 and 14-15 Honda Civic Si spec lines for T4 #31596removed
  • T4 Request to clarify radiator hoses #31682wording
  • T4 Clarify Permitted/Allowed #31743suspension & brakes
  • T4 Correct RSX wording #31746tyres & wheels
  • T4 Camaro #31751suspension & brakes
  • T3 Request to correct model years BMW Z4 M Coupe #31371wording
  • T3 Correct letter the 31327 #31563weight +150 lbs
  • T4 Nissan Sentra SE-R Spec. V #30958cars added
  • T4 Mazda RX-8 Spec Line Suspension Parts #31113induction
  • T4 Diverter Valve Plunger Upgrade #31307engine
  • T4 Adjust Honda FWD in T4 to encourage more Drivetrain Diversity #31472tyres & wheels
  • T4 Touring 4 BOP adjustments for 2022 #31482weight -175 lbs
  • T3 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added
  • T3 Request Weight Reduction 323is #30765weight -100 lbs
  • T3 Class Newer STI in T3 #31327cars added
  • T4 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added
Indianapolis Motor Speedway Runoffs 20212021-09-251:36.395Max Grau · fastest of 28 · top 5 within 0.7s1:36.655Max Grau · fastest of 28 · top 5 within 0.7s146.2Gray Fowler1:54.397Stephen Blethen · fastest of 47 · top 5 within 0.9s-2.169s (-1.86%)1:55.929John Heinricy · fastest of 46 · top 5 within 1.0s-0.994s (-0.85%)127.3Alexander Schefer+19.274squal +18.002s119.9%qual 118.7%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+22.182squal +21.300s122.9%qual 122.1%1:51.591Marshall Mast · fastest of 23 · top 5 within 0.9s-0.623s (-0.56%)1:52.701Breton Williams · fastest of 22 · top 5 within 0.7s-0.585s (-0.52%)136.4Jason Ott+16.046squal +15.196s116.6%qual 115.8%
40 rule changes (T4: 20, SM: 1, T3: 19)6 weight · 5 cars added · 5 tyres & wheels · 3 induction · 3 suspension & brakes · 2 wording · 16 othershowhide
  • T3 Follow-up to letter 29797-Porsche Spec Boxster in T3 Adjustment #30144weight -50 lbs
  • T3 Wheel Size #30677tyres & wheels
  • T3 Request weight adder to be applied to the Global Cup Miata ND2 #30730weight
  • T4 Wrong Part Number on 320i Spec Line #30645wording
  • T3 Civic Type R Brake Rotors #29817suspension & brakes
  • T4 Civic Type R Brake Rotors #29817suspension & brakes
  • T3 Requesting Variance on Hardtop #30093other
  • T3 07-09 and 10-13 Mazdaspeed 3 Fuel Pump #30154other
  • T4 Mini Cooper Spec Line Anomalies #30478weight
  • T4 Request CAI Mustang in T4 #30562induction
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • T3 Request consistency review in GCR #30263other
  • T3 Request to classify 2006-2008 Cayman #30315cars added
  • T4 Request consistency review in GCR #30263other
  • T3 2020 T3 Suggested Changes #30002weight -50 lbs
  • T4 E & O T4 Mustang Wheels #30245tyres & wheels
  • T3 2021 Toyota Supra #29567cars added
  • T3 Chevrolet Camaro LT-I4 Turbo 1LE (2019-) Model Year to 2016- #30090induction
  • T3 Fix T2 Mustang spec line #30106other
  • T3 Spec Boxster Tire Size #30159tyres & wheels
  • T4 2021 Toyota Supra #29567cars added
  • T4 06-15 MX-5 Durability #29781other
  • T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-) #29838induction
  • T4 NC MX-5 06-15 Part Number updates for 2021 #29921weight
  • T4 BMW Z4 2.5L (03-05) Spec Line #30037weight -50 lbs
  • T4 Sway Bars for T4 2016+ MX5 Mazda #30063suspension & brakes
  • T4 Change part numbers on BRZ, FRS lines in T4 #30104wording
  • T4 T4 Mustang Axle Ratio and Wheels #30149tyres & wheels
  • T3 Request to Classify BMW M2 CS #29523cars added
  • T3 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5 #29681other
  • T3 350Z Rear Caliper Replacement #29710other
  • T3 Request Mustang 8.8” rear axle replacement #29860other
  • T3 Cap year range on all 86s #29908other
  • T4 Request to Classify BMW M2 CS #29523cars added
  • T4 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5 #29681other
  • T4 Request Mustang 8.8” rear axle replacement #29860other
  • T4 Cap year range on all 86s #29908other
  • T3 Alfa Romeo 4C Launch Edition #29531other
  • T4 Alfa Romeo 4C Launch Edition #29531other
  • T4 Post Runoffs Feedback for T4 #29752tyres & wheels -50 lbs
Road America Runoffs 20202020-10-022:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s143.4Owen McAllister2:37.403John Heinricy · fastest of 20 · top 5 within 2.5s2:37.881Chi Ho · fastest of 19 · top 5 within 1.6s130.2Chi Ho+24.610squal +24.597s118.5%qual 118.5%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+30.477squal +29.403s122.9%qual 122.1%2:29.757Marshall Mast · fastest of 29 · top 5 within 2.1s2:31.688Marshall Mast · fastest of 20 · top 5 within 1.8s138.1Jason Ott+18.417squal +16.951s113.8%qual 112.8%
55 rule changes (FE2: 2, T4: 25, SM: 2, T3: 26)11 weight · 8 cars added · 6 suspension & brakes · 5 tyres & wheels · 3 engine · 2 induction · 1 aero · 8 wording · 11 othershowhide
  • SM Radiator E&O Clarifications #29294engine
  • T3 Request to Classify Honda Civic Type R in T3 #27840cars added
  • FE2 FE/FE2 Oil Cooler #29293wording
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T3 Request to classify 2009 Honda Accord v6 manual #28913cars added
  • T4 Scion FRS Solo Spec Coupe Gear Ratio #29021other
  • T3 SADEV Sequential Gearbox #28763other
  • T3 Request for competition adjustment for the MK5 GTI FSI engine #28802engine
  • T3 Request to Add a Vehicle to the Roster (contd.) #27698other
  • T4 T4 RX8 bodywork clarification #28941aero
  • T4 2006-2015 MX-5 Clarification #28942tyres & wheels
  • T4 Request to Add a Vehicle to the Roster (contd.) #27698other
  • T3 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added
  • T3 Request Nissan 350Z Part Number change #28145induction
  • T4 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added
  • T3 2015 + Ford EcoBoost Mustang Sway Bars #28398suspension & brakes
  • T3 Z3M Roadster Weight #28437weight
  • T4 Request to change allowed header part # for T4 06-15 Miata #28223wording
  • T4 Z3M Roadster Weight #28437weight
  • T3 Clarify 05-10 V8 Mustang Spring Rates Wording/Adjust Restrictor #28238induction
  • T3 Correct Touring 3 05-10 Mustang final drive #28288wording
  • T4 Request for 12-13 and 14-15 Honda Civic Springs #27848suspension & brakes
  • T4 Request to Clarify T4 05-10 Mustang Spring Allowance #27899suspension & brakes
  • T3 2006 BMW E90 330i Sedan Classification #26663weight
  • T3 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs
  • T3 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added
  • T3 Request for 2005 Subaru STI Changes #27658tyres & wheels +50 lbs
  • T3 Request to Classify 2017 Ford Fiesta ST #27700cars added
  • T4 Request to Allow Brake Upgrade on T4 Mustang #27329suspension & brakes
  • T4 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs
  • T4 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added
  • T4 Request for 2014-2018 Mazda 3 GT Brakes #27659suspension & brakes
  • T4 Request to allow aftermarket OEM coolant expansion tank #27763engine
  • T4 Request to allow aftermarket OEM power steering reservoir #27764wording
  • T4 Request for Factory Installed Wings on Subaru BRZ #27831other
  • T4 Request for Replacement Clutches #27892other
  • T4 Request to Classify Chevy Sonic 1.4 In T4 #27906cars added
  • T4 Weight Change Request for 1999 Mazda Miata #28129weight -50 lbs
  • T3 Clarification of On-Board Fire System for T2 #27183wording
  • T3 Mustang Ecoboost and GT Transmission #27439other
  • T3 Nissan 350Z HR Engine Restrictor Plate/Minimum Weight #27442weight +50 lbs
  • T3 Request help for the GMX5 #27572tyres & wheels
  • T3 Request for 05-10 Mustang GT Suspension Upgrades #27777weight
  • T3 Please Update the BMW SpecE46 Rules #27781tyres & wheels
  • T3 Request for 02-03 WRX Spec Line Parts #27864weight -100 lbs
  • T3 T4 RX8 Classification Error #27902wording
  • T3 Request to add Toyota 86 GT to Spec Line #27910other
  • T4 Clarification of On-Board Fire System for T2 #27183wording
  • T4 Mustang Ecoboost and GT Transmission #27439other
  • T4 BRZ/FRS/86 Tire Size in T4 #27660tyres & wheels
  • T4 NC MX5 2006-2015 Spec Adjustment Request #27739weight -75 lbs
  • T4 T4 RX8 Classification Error #27902wording
  • T4 Request to add Toyota 86 GT to Spec Line #27910other
  • FE2 FE / FE2 Update Rules #27624weight
  • T3 Request to add 2018 Subaru BRZ in T3 #27253other
Virginia International Raceway Runoffs 20192019-10-051:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s142.6Robert Vanman2:11.257John Heinricy · fastest of 25 · top 5 within 0.2s2:10.959Nick Leverone · fastest of 25 · top 5 within 0.6s128.9Tommy Boileau+18.805squal +20.195s116.8%qual 118.2%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+24.305squal +23.490s121.7%qual 121.2%2:04.918Marshall Mast · fastest of 20 · top 5 within 1.1s2:05.354Broderick Bauguess · fastest of 20 · top 5 within 1.6s138.2Scotty B White+13.200squal +13.856s111.8%qual 112.5%
48 rule changes (T4: 15, SM: 4, T3: 29)14 weight · 9 cars added · 8 suspension & brakes · 5 tyres & wheels · 2 engine · 1 induction · 1 removed · 4 wording · 4 othershowhide
  • T3 Request Mazda NC MX-5 alternate transmission gear ratios #27155other
  • T3 Request spare tire/wheel clarification #27012tyres & wheels
  • T4 Request spare tire/wheel clarification #27012tyres & wheels
  • T4 Research E&O Mazda MX5 #27112weight
  • T3 Request guidance for 2014-2017 MK7 Volkswagen GTI #26866weight
  • T3 Request BMW e36 M3 sway bar and links #26885suspension & brakes
  • T4 MR2 Spyder Year Correction #26936wording
  • T3 Request to properly class base Porsche Cayman #26276weight
  • T4 Request to allow piggy back ECU on 2000 Mazda Protégé #26085engine
  • T4 Request helper spring as optional #26678suspension & brakes
  • T3 Request to classify a 2019 Chevrolet Camaro LT-I4 Turbo 1LE #25731cars added
  • T3 T3 Civic Si weight change #26294weight
  • T3 Class Civic Si 2017+ w/ alternate cage #26449cars added
  • T3 Classify 2014-2017 MK7 Volkswagen GTI for T3 #26695cars added
  • T3 Request to allow E36 M3 in T3 prepared to BMWCCA I sport #25195cars added
  • T4 Request to classify 2000 - 2001 BMW 323 #25096cars added
  • SM Request to allow aftermarket fuel filters. #26370wording
  • T3 Request Mustang GT Limited Prep 2018 Classification #24431cars added
  • T3 Classify 2015+ WRX #25832cars added
  • T3 Correct Mazda MX-5 Hard Top Notes #26137weight
  • T3 Request to allow T3 06-15 Miata 17x8 wheels #26161tyres & wheels
  • T3 Request T3 06-15 Miata header #26162other
  • T3 Request Pontiac GXP same allowances to Saturn Sky #26175weight
  • T3 Consider opening class rules to allow any thermostat #26187wording
  • T3 2005-2009 Legacy GT/Spec B #26384cars added
  • T3 Cap 2016 Mazda Miata year at 2018 #26388other
  • T4 Correct Mazda MX-5 Hard Top Notes #26137weight
  • T4 Consider opening class rules to allow any thermostat #26187wording
  • T4 Cap 2016 Mazda Miata year at 2018 #26388other
  • 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
  • T3 Request correction on brake sizes #26170suspension & brakes
  • T4 2012-2015 Honda Civic Si Performance Request #26129suspension & brakes
  • T3 Errors, Omissions, and Updates (Various) #22414weight
  • T3 Request to update SpecE46 Appendix N. with 2019 Rules #25722removed
  • T3 Request Alternative Nissan Brake Parts - 350Z #25747suspension & brakes
  • T3 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
  • T3 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes
  • T3 Additional weight adjustments for T3 cars T3 weight loss #25803weight
  • T3 Request for Alternate EcoBoost Mustang Brakes #25813suspension & brakes
  • T3 Request to Add the FR-S/86 and BRZ Spec Lines to T3 #25888weight
  • T3 Request to Clarify BMW SpecE46 Tire Verbiage #26027tyres & wheels
  • T4 Errors, Omissions, and Updates (Various) #22414weight
  • T4 Request for Adjustments to fiat 124 specline #25371induction
  • T4 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
  • T4 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes
  • T4 Consider Solo SSC cross over classification into T4 #25802cars added
Sonoma Raceway Runoffs 20182018-10-101:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s126.8Scott Rettich1:52.339Gresham Wagner · fastest of 12 · top 5 within 1.1s1:54.030John Heinricy · fastest of 12 · top 5 within 0.2s106.0Ross Murray+18.467squal +17.299s119.3%qual 118.2%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+19.715squal +19.315s120.6%qual 120.3%1:10.656Mark Drennan · fastest of 17 · top 5 within 19.6s1:49.610Mark Drennan · fastest of 17 · top 5 within 0.4s108.4Marshall Mast+14.047squal -24.384s114.7%qual 74.3%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:56.566Oscar Jackson · fastest of 40 · top 5 within 0.6s1:56.923Oscar Jackson · fastest of 38 · top 5 within 1.1s1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s1:52.214Rob Hines · fastest of 24 · top 5 within 0.8s1:53.286Charles Hurley · fastest of 22 · top 5 within 0.6s
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:38.813Jonathan Yanca · fastest of 34 · top 5 within 2.0s1:40.397Oscar Jackson · fastest of 32 · top 5 within 0.8s1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s1:36.741Charles Hurley · fastest of 10 · top 5 within 1.0s1:37.371Robert Schader · fastest of 10 · top 5 within 0.4s
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:15.886Philip Royle · fastest of 22 · top 5 within 0.9s2:15.994Philip Royle · fastest of 20 · top 5 within 1.6s2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s2:08.573Scotty B White · fastest of 5 · top 5 within 7.9s2:08.363Tom Wickersham · fastest of 5 · top 5 within 8.3s

By track

TrackEvents Typical % of FE2 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%1 of 2 with FE2100.0%Runoffs 2021100.0%Runoffs 2021
Daytona International Speedway10 of 1 with FE2
Mid-Ohio Sports Car Course10 of 1 with FE2
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 FE2'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.