BoP Lab / Classes / F5

F5 vs FE2 vs FM vs T2 pace at every track

Lap times across years say as much about the weather as the class. % of F5 is each class's best lap as a share of F5'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-SpecEPF5×FAFCvsFE2 ×FFvsFM ×FPFVFXGT1GT2GTXHPPP2SMSMXSRF3STLSTUT1vsT2 ×T3T4Show 49 inactive classes

Series Runoffs Super Tour Both

Reference · what % is measured against

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

Closest to the field: F5 100.0% of F5 Matthew Strand, Daytona International Speedway Runoffs 2015 race · FE2 93.1% of F5 Jason Conzo, Virginia International Raceway Runoffs 2022 race · FM 95.5% of F5 Bryce Cornet, Sonoma Raceway Runoffs 2018 race · T2 87.9% of F5 Kurt Rezzetano, Virginia International Raceway Runoffs 2022 race

% of F5Lap times

F5FE2FMT2solid race · dashed qualifying · slower is lower

F5FE2FMT2solid race · dashed qualifying · each class's best lap as a share of F5's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	F5			FE2					FM					T2
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs F5	% of F5	Qual best	Race best	Trap	vs F5	% of F5	Qual best	Race best	Trap	vs F5	% of F5
	Road America Runoffs 20262026-09-28				2:12.326Franklin 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%)								2:23.977Scotty 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%)
27 rule changes (FE2: 1, T2: 26)8 weight · 4 cars added · 3 induction · 3 suspension & brakes · 2 aero · 1 engine · 1 tyres & wheels · 5 othershowhide 2026-09-01 T2 TCR Data Points - BoP #40508weight +300 lbs 2026-07-01 T2 2023 TCR Hyundais #40278cars added 2026-06-01 T2 2015+ Ecoboost Mustang #40005weight -100 lbs 2026-06-01 T2 C6 Corvette - All Body Trims Requested #40174aero 2026-06-01 T2 T2-TCR Table Mazda 3 #40209tyres & wheels 2026-04-01 T2 14-17 BMW 435i Brake Approval Request #39910suspension & brakes 2026-04-01 T2 Porsche Cayman S Spec Lines Needed for Atlanta HST #39947engine 2026-04-01 T2 Please address loopholes in T2 TCR #40002weight 2026-03-01 T2 BMW 240i Permitted Tune #39861other 2026-02-01 T2 Request to Add 2014-2017 435i to T2 #38991cars added 2026-02-01 T2 Consideration for Nissan Z & NISMO Z to Touring 2 Class #39296cars added 2026-02-01 T2 Allow Alt Bushing Material in Toe Links #39607suspension & brakes 2026-02-01 T2 Request for Classification of MG6 TCR in T2-TCR Class #39702cars added 2026-01-01 T2 Alternate Placement of Fuse Panel and Electronics Request #39370other 2026-01-01 T2 Rebalance Blackwing Cadillac T2 for 2026 #39426weight -50 lbs 2026-01-01 T2 C6 LS2 Corvette Parity Request #39472induction 2026-01-01 T2 T2 Tire Sizing #39490weight -25 lbs 2026-01-01 T2 Rear Spoiler for Mustang GT S550 (15-23) #39499aero 2026-01-01 T2 Clarify T4 Brake Rotor Allowance #39503suspension & brakes 2025-12-01 T2 Help the 2011-2014 s197Mustang GT and Boss302 Less Restriction #38523induction 2025-12-01 T2 Improving Competitiveness of Gen 5 Camaro SS #39021weight -50 lbs 2025-12-01 T2 Adjust T2 Darkhorse R #39346weight 2025-11-01 T2 ND Gearset Request for T4 #39166other 2025-11-01 T2 ND Spec Lines Wrong PT#'s #39170weight 2025-11-01 T2 Touring 2 Post-Runoffs BOP Adjustments and Changes #39274induction -50 lbs 2025-11-01 T2 Adjust rev limit on Spec Corvette in T2 #39282other 2025-10-01 FE2 FE & FE2 Bubble Tail #38978other
	Road America Runoffs 20252025-09-29				2:12.475Franklin 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%)								2:23.351Kurt 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%)
30 rule changes (FE2: 1, T2: 29)6 induction · 5 tyres & wheels · 4 cars added · 4 weight · 3 suspension & brakes · 2 engine · 2 removed · 1 wording · 3 othershowhide 2025-08-01 T2 Incorrect Touring Heading #38451wording 2025-08-01 T2 Clarifications needed to BMW M2 CS cup line #38536tyres & wheels 2025-08-01 T2 Fix brake allowance supersessions. #38554suspension & brakes 2025-08-01 T2 C5 Corvette correction #38782induction 2025-05-01 T2 C6 T-2 Corvette 6 Liter Engine Restrictor #37490induction 2025-05-01 T2 370Z Mid link Replacement for True Coil Overs and OEM Wheel Size #38014tyres & wheels 2025-05-01 T2 T2 Cadillac tire #38210tyres & wheels 2025-04-01 FE2 Driver Safety & Comfort #37965other 2025-04-01 T2 Please class the Darkhorse R in T2 #37295cars added 2025-04-01 T2 T2 350Z Spec Line Cleanup #37603weight 2025-03-01 T2 T2 BOP #37312induction 2025-02-01 T2 Mustang Update backdate #37275removed 2025-02-01 T2 BOP Adjustment for 2016 - Camaro SS/1LE #37434weight +100 lbs 2025-02-01 T2 BMW M235iR TCS CHANGE REQUEST #37470other 2025-02-01 T2 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added 2025-01-01 T2 Remove spec lines that have expired #37269induction 2025-01-01 T2 BoP for the Various Mustangs #37185weight -50 lbs 2025-01-01 T2 Spec Corvette Line Clarification. #37441weight 2024-12-01 T2 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes 2024-12-01 T2 Request Less Restriction for Ls-3 Engined C6 Corvette #36810induction 2024-12-01 T2 Fuel Emissions Components #37076engine 2024-12-01 T2 fix brake wording #37129suspension & brakes 2024-12-01 T2 Evaporative emissions systems #37130engine 2024-12-01 T2 Move Spec Boxster to T4 #37158cars added 2024-12-01 T2 Corvette Wheels #37169tyres & wheels 2024-12-01 T2 BMW 320i Spec Line #37204other 2024-12-01 T2 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added 2024-12-01 T2 Please Consider Allowing Update to the C5 Corvette #37298induction 2024-12-01 T2 Major error in lane, but nobody ran it. #37302removed 2024-11-01 T2 Spec Corvette Change for T2 #37127tyres & wheels
	Road America Runoffs 20242024-10-01				2:11.506Porter 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%)								2:22.117Kurt 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%)
31 rule changes (T2: 31)9 weight · 7 suspension & brakes · 3 induction · 3 tyres & wheels · 1 cars added · 1 engine · 1 wording · 6 othershowhide 2024-08-01 T2 Errors #36214induction -75 lbs 2024-08-01 T2 Subaru Appeal #36258other 2024-08-01 T2 S550 Brakes #36571suspension & brakes 2024-07-01 T2 Mustang T2/T3 #35877other 2024-07-01 T2 S550 Brakes #35926suspension & brakes 2024-07-01 T2 T2-T4 Driveshaft Mistake...? #36050weight 2024-07-01 T2 request for allowance of 6 piston calipers for T2 C5 corvettes #36126other 2024-07-01 T2 B8/8.5 Audi S4 T3 and T2 #36195cars added 2024-05-01 T2 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine 2024-05-01 T2 Competition Adjustment Request/Wheel Size of E46 #35895tyres & wheels 2024-05-01 T2 Driveshafts #35916weight 2024-04-01 T2 Brake Request for 2009 Porsche Cayman #35723suspension & brakes 2024-03-01 T2 Reorganize Spec Lines #35375induction 2024-03-01 T2 370Z Brake Rotor Size Correction #35487suspension & brakes 2024-03-01 T2 Letter #35154 2018+ Mustang GT Expansion #35488suspension & brakes 2024-02-01 T2 2015+ Mustang Sway Bar and A-Arm Request #35154suspension & brakes 2024-02-01 T2 Brake Kits #35245suspension & brakes 2024-02-01 T2 Runoffs wording on Caddy in T2 #35377wording 2024-02-01 T2 More Car Lightening Stuff #35319weight 2024-02-01 T2 Inclusion of B-C spec cars in T4 #35374other 2024-02-01 T2 T2-T4 Set expiration dates on spec lines #35378induction 2024-02-01 T2 Reply to letter #35161 and #31661 #35384weight +75 lbs 2024-01-01 T2 Rebalance Blackwing Cadillac T2 #35079tyres & wheels 2024-01-01 T2 M2 CS RACING #35130weight -50 lbs 2024-01-01 T2 Spec Corvette in T2 #35139weight -175 lbs 2024-01-01 T2 T2 Viper BoP #35155tyres & wheels 2024-01-01 T2 BOP Adjustment for 5.0L Mustangs #35156weight +75 lbs 2024-01-01 T2 Take at Look at T-2 BOP #35161weight -50 lbs 2024-01-01 T2 C5 Corvette Spec Line Oversight #35169weight 2024-01-01 T2 Requested Update of Model Years of 370Z #35231other 2023-12-01 T2 M2 CS RACING #35122other
	Virginia International Raceway Runoffs 20232023-09-23				1:50.665Charles 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%)								1:59.504Kurt Rezzetano · fastest of 13 · top 5 within 2.1s-0.772s (-0.64%)	2:01.201Kurt Rezzetano · fastest of 13 · top 5 within 1.6s-3.555s (-2.85%)	150.7Scotty B White-1.9 mph (-1.2%)
17 rule changes (T2: 17)4 suspension & brakes · 4 weight · 2 tyres & wheels · 1 engine · 1 induction · 1 wording · 4 othershowhide 2023-08-01 T2 Corvette LS2 Restrictor Plate Adjustment #34456induction 2023-08-01 T2 Blacking Cadillac Fuel Capacity #34624engine 2023-08-01 T2 Rules Clarification for Mazda RX8 Spec Line #34395weight 2023-08-01 T2 rule book corrections #34437wording 2023-08-01 T2 Ride Height Correction for the T3 Solstice. #34615suspension & brakes 2023-07-01 T2 370Z Obsolete Parts & NISMO Alternatives to SPL Parts #34297weight 2023-06-01 T2 2009 Porsche Cayman Classing Request #34147other 2023-05-01 T2 C5 Z06 Straight Line Speed #33575weight 2023-04-01 T2 Allowance of any nonmetallic bushing material in T2 #33833suspension & brakes 2023-04-01 T2 Allow Adjustable stabilizer bar links #33861suspension & brakes 2023-03-01 T2 Honda Civic Type R Tire Size Increase #33672tyres & wheels 2023-02-01 T2 C5 Corvette Swaybars #33269other 2023-02-01 T2 Mustang OEM Grill Request #33333other 2023-01-01 T2 BMW M235iR/M240iR Aftermarket 2WNR Shocks Allowed - Touring 2 #33464suspension & brakes -50 lbs 2023-01-01 T2 Touring (T2-T5) Category #33617tyres & wheels 2023-01-01 T2 ENO 9.1.9.2.D.1.e.1.a. #33651other 2022-12-01 T2 Heavy Cars #33345weight +125 lbs
	Virginia International Raceway Runoffs 20222022-09-24	1:57.689James Weida · fastest of 11 · top 5 within 3.9s+0.328s (+0.28%)	2:21.862Sven de Vries · fastest of 10 · top 5 within 14.3s+24.290s (+20.66%)	142.9Calvin Stewart+0.1 mph (+0.1%)	1:50.853Charles 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%)	-9.817squal -6.836s	93.1%qual 94.2%						2:00.276Kurt Rezzetano · fastest of 14 · top 5 within 1.7s+2.739s (+2.33%)	2:04.756Kurt Rezzetano · fastest of 14 · top 5 within 2.0s+6.205s (+5.23%)	152.5Aaron Kaplan+3.2 mph (+2.1%)	-17.106squal +2.587s	87.9%qual 102.2%
26 rule changes (F5: 6, T2: 20)5 cars added · 5 suspension & brakes · 3 engine · 3 induction · 3 weight · 1 tyres & wheels · 1 wording · 5 othershowhide 2022-09-01 F5 Intake Boots Correction #33028induction 2022-08-01 F5 Ensure availability of ECU for Rotax engines #32695engine 2022-07-01 F5 Clarify stepped exhaust header references #32743engine 2022-06-01 F5 593 carb boot availability and oil pump clarification #32527induction 2022-06-01 T2 BMW M235iR/M240iR Min Weight Clarification #32430weight 2022-06-01 T2 Follow up to Letter 30888 #32477other 2022-05-01 T2 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes 2022-05-01 T2 Request BoP E92 torque #32456other 2022-05-01 T2 Classify Cadillac Blackwing #32535cars added 2022-04-01 T2 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine 2022-04-01 T2 BMW M2 CS Cup 2020- Exhaust #32243tyres & wheels 2022-04-01 T2 RequestT2 classification- 2022 Cadillac CT4-V Blackwing #32263cars added 2022-03-01 F5 E&O class name #32194other 2022-03-01 T2 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes 2022-03-01 T2 C6 Restrictor Help #31995induction 2022-02-01 T2 BMW Z4M Adjustment #31885weight -50 lbs 2022-01-01 F5 Data Box Mounting Plate #31638other 2022-01-01 T2 Touring 2 BOP adjustments for 2022 #31480weight -50 lbs 2022-01-01 T2 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes 2022-01-01 T2 Request to clarify radiator hoses #31682wording 2022-01-01 T2 Clarify Permitted/Allowed #31743suspension & brakes 2022-01-01 T2 SMG #31837other 2021-12-01 T2 Typo for BMW M2 CS Cup 2020 #31173suspension & brakes 2021-11-01 T2 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added 2021-11-01 T2 Request new car 2017 BMW M2 #30486cars added 2021-11-01 T2 Request to Classify Porsche 997.2 GTS in T2 (body not = to C2S) #30686cars added
	Indianapolis Motor Speedway Runoffs 20212021-09-25	1:42.619Ryan Mayfield · fastest of 22 · top 5 within 1.6s-0.517s (-0.50%)	1:43.140Sven de Vries · fastest of 20 · top 5 within 1.7s+0.280s (+0.27%)	144.4James Weida	1:36.395Max Grau · fastest of 28 · top 5 within 0.7s	1:36.655Max Grau · fastest of 28 · top 5 within 0.7s	146.2Gray Fowler	-6.485squal -6.224s	93.7%qual 93.9%						1:47.509Kurt Rezzetano · fastest of 26 · top 5 within 1.6s-1.109s (-1.02%)	1:48.474Kurt Rezzetano · fastest of 26 · top 5 within 2.5s-0.295s (-0.27%)	151.5Scotty B. White	+5.334squal +4.890s	105.2%qual 104.8%
33 rule changes (F5: 3, T2: 30)8 weight · 3 cars added · 3 suspension & brakes · 3 tyres & wheels · 1 engine · 1 induction · 2 wording · 12 othershowhide 2021-09-01 T2 BMW M2 CS Power Stick Part Number #31087wording 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wording 2021-08-01 F5 Request to correct terminology #30976tyres & wheels 2021-08-01 T2 997.1 EO #30933other 2021-07-01 T2 Request #30406weight 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712engine 2021-06-01 T2 Civic Type R Brake Rotors #29817suspension & brakes 2021-06-01 T2 Mustang S550 Parity in T2 #29925other 2021-06-01 T2 Request BOP on BMW Z4 T2 car #30597weight +50 lbs 2021-06-01 T2 E92 #30639weight -50 lbs 2021-05-01 T2 C5/6 Corvette in T1, T1-LP and T2 Dry Sump Standardization #29046other 2021-05-01 T2 Request for Chevrolet Camaro 1LE (2016-) Auto Trans #29067other 2021-05-01 T2 Request E46 M3 Minimum Competition Weight #29429weight -100 lbs 2021-05-01 T2 Request to add 2015 to Chevrolet Camaro SS/1LE 2010-2014 #29736other 2021-04-01 T2 Request consistency review in GCR #30263other 2021-04-01 T2 Class Spec Corvette in T2? #30297cars added 2021-04-01 T2 E92 BMW Spring Rate Request #30391suspension & brakes 2021-04-01 T2 Please correct recent T2 Spec Line #30401suspension & brakes 2021-03-01 T2 Request BMW M2CS door glass removal #30254other 2021-02-01 T2 Request Addition of BMW M240iR #29503weight 2021-02-01 T2 2021 Toyota Supra #29567cars added 2021-02-01 T2 Request Cold Air Intake for Honda Civic Type R #29942induction 2021-02-01 T2 Adjust T2 spec line that was missed in T2 BOP #30055weight -50 lbs 2021-02-01 T2 Fix T2 Mustang spec line #30106other 2021-02-01 T2 Z4 Wheel Size #30113tyres & wheels 2021-02-01 T2 Clarify T2 Spec lines #30194tyres & wheels 2021-01-01 T2 Request to Classify BMW M2 CS #29523cars added 2021-01-01 T2 350Z Rear Caliper Replacement #29710other 2021-01-01 T2 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement #29860other 2021-01-01 T2 Cap year range on all 86s #29908other 2020-12-01 T2 Request to Reevaluate T2 Spec Line for E92 M3 #28266weight -50 lbs 2020-12-01 T2 Request for Parity Among Vehicles Including S550 Mustang #29486weight -75 lbs 2020-12-01 T2 Alfa Romeo 4C Launch Edition #29531other
	Road America Runoffs 20202020-10-02	2:20.954Calvin Stewart · fastest of 16 · top 5 within 1.8s	2:21.391James Weida · fastest of 14 · top 5 within 1.5s	143.2Aaron Ellis	2:12.806Scott Rettich · fastest of 25 · top 5 within 0.6s	2:13.271Owen McAllister · fastest of 23 · top 5 within 0.7s	143.4Owen McAllister	-8.120squal -8.148s	94.3%qual 94.2%						2:24.195Alan Kossof · fastest of 15 · top 5 within 2.5s	2:26.803Kurt Rezzetano · fastest of 14 · top 5 within 2.2s	147.3Mark Boden	+5.412squal +3.241s	103.8%qual 102.3%
38 rule changes (F5: 6, FE2: 2, T2: 30)9 weight · 7 suspension & brakes · 3 engine · 3 induction · 2 cars added · 1 aero · 1 tyres & wheels · 6 wording · 6 othershowhide 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engine 2020-10-01 T2 Request 2018+ mustang swaybar update #28659suspension & brakes 2020-09-01 FE2 FE/FE2 Oil Cooler #29293wording 2020-09-01 T2 Request to Clarify New 2-piece Brake Rotor Rule #29106suspension & brakes 2020-09-01 T2 please consider BoP for the following cars in T2 #29266weight -50 lbs 2020-09-01 T2 Request clarification on most recent approval by the Board #29284suspension & brakes 2020-08-01 T2 Request to correct GCR for 2018+ FORD Mustang GT & Ecoboost #28803wording 2020-07-01 F5 Request for Cockpit Adjustment of External Jetting Devices #28359other 2020-07-01 F5 Two Stroke Motors (reply to #28359 WDYT) #28816engine 2020-07-01 F5 Re letter requesting driver adjustable carb mixture #28840other 2020-07-01 F5 #28359 WDYT Request for Cockpit Adjustment #28875other 2020-07-01 T2 Request to Add a Vehicle to the Roster (contd.) #27698other 2020-07-01 T2 Request brake upgrade and electric power steering pump #28946suspension & brakes 2020-06-01 T2 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added 2020-06-01 T2 Consider coil spring conversion Corvette in T2 #28824suspension & brakes 2020-05-01 T2 Please Add the Following BBK to Allowed List for E92 M3 #28421wording 2020-05-01 T2 C5 Weight Adjustment #28433weight -50 lbs 2020-05-01 T2 Z3M Roadster Weight #28437weight 2020-04-01 T2 Limit Changes to the 997.2 Porsche #28242aero 2020-04-01 T2 Correct T2 Mustang Transmission #28732wording 2020-03-01 T2 Request to Readjust the T2 Porsches #27746induction 2020-02-01 T2 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs 2020-02-01 T2 Request for Two Piece Stop Tech Brake Rotors #27582suspension & brakes 2020-02-01 T2 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added 2020-02-01 T2 Request for Alternative Brake Kit on Nissan 370Z #27912suspension & brakes 2020-02-01 T2 2015- Current Ecoboost Mustang #27971weight -100 lbs 2020-02-01 T2 T2 Mustang #28022tyres & wheels 2020-01-01 F5 Change 600cc restrictor size #27883induction 2020-01-01 T2 Clarification of On-Board Fire System for T2 #27183wording 2020-01-01 T2 Mustang Ecoboost and GT Transmission #27439other 2020-01-01 T2 Request for Dailey Engineering Dry Sump on 2010 Camaro SS #27514engine 2020-01-01 T2 Request for Half Shafts - 2014 Camaro SS 1LE #27584induction 2020-01-01 T2 Request for Parity Among Vehicles #27665weight -50 lbs 2020-01-01 T2 Request for 2016-2020 Camaro SS Help #27776weight -50 lbs 2020-01-01 T2 Request for Competitive Adjustments to Honda Civic Type R #27839weight -50 lbs 2020-01-01 T2 T4 RX8 Classification Error #27902wording 2020-01-01 T2 Request to add Toyota 86 GT to Spec Line #27910other 2019-12-01 FE2 FE / FE2 Update Rules #27624weight
	Virginia International Raceway Runoffs 20192019-10-05	1:57.361Wiley Mcmahan · fastest of 15 · top 5 within 3.8s	1:57.572Wiley Mcmahan · fastest of 15 · top 5 within 4.0s	142.8Eric McRee	1:51.062Liam Snyder · fastest of 20 · top 5 within 1.3s	1:52.154Liam Snyder · fastest of 19 · top 5 within 0.7s	142.6Robert Vanman	-5.418squal -6.299s	95.4%qual 94.6%	1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s	2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s	135.7Bryce Cornet	+18.244squal -2.237s	115.5%qual 98.1%	1:57.537Cooper I MacNeil · fastest of 19 · top 5 within 3.4s	1:58.551Cooper I MacNeil · fastest of 18 · top 5 within 2.4s	149.4James Leithauser	+0.979squal +0.176s	100.8%qual 100.1%
24 rule changes (F5: 1, T2: 23)7 suspension & brakes · 6 weight · 5 cars added · 2 tyres & wheels · 1 induction · 1 wording · 2 othershowhide 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs 2019-08-31 T2 Request spare tire/wheel clarification #27012tyres & wheels 2019-07-01 T2 Request to change Cadillac CTS-V years from 06-07 to 04-07 #26842cars added 2019-07-01 T2 Request to allow Hotchkiss front / rear sway bars on T2 CTS-V #26845suspension & brakes 2019-07-01 T2 Consider T2 06-07 Cadillac CTS-V BoP #27022induction 2019-07-01 T2 Correct T2 Mustang tire size #27024tyres & wheels 2019-05-31 T2 2018+ Audi TT RS Suspension Allowances #26631suspension & brakes 2019-05-31 T2 Request BOP adjustment for 2018 Honda Civic Type R-TIR removal #26882weight +150 lbs 2019-04-01 T2 Request for Removal of Rear Anti-roll Bar in T2 Mustang GT #26533suspension & brakes 2019-03-01 T2 Request Mustang GT Limited Prep 2018 Classification #24431cars added 2019-03-01 T2 Request to Classify 2018 Audi TT RS #25961cars added 2019-03-01 T2 Request for Adjustments on 2017+ Civic Type R #25969suspension & brakes 2019-03-01 T2 Correct Mazda MX-5 Hard Top Notes #26137weight 2019-03-01 T2 Consider opening class rules to allow any thermostat #26187wording 2019-03-01 T2 Ford Mustang Boss 302 (12-13) - correct weight #26287weight -50 lbs 2019-03-01 T2 Request camber correction 005-2013 corvette C6 #26288suspension & brakes 2019-03-01 T2 Request 98-02 Firebird 98-02 Camaro reloacte rear spring #26291suspension & brakes 2019-03-01 T2 Cap 2016 Mazda Miata year at 2018 #26388other 2019-03-01 T2 Class Ford Mustang GT 2018+ (reference letter 24431) #26400cars added 2019-01-01 T2 Errors, Omissions, and Updates (Various) #22414weight 2019-01-01 T2 Request to classify 2015 Cayman GTS 3.4L in T2 #25335cars added 2019-01-01 T2 Request for 2017-2018 Honda Civic Type R - 4 BOP Grill #25513other 2019-01-01 T2 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight 2019-01-01 T2 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes
	Sonoma Raceway Runoffs 20182018-10-10	1:41.807Jeff Jorgenson · fastest of 5 · top 5 within 6.6s	1:42.491David Lapham · fastest of 5 · top 5 within 9.5s	113.3David Lapham	1:35.040Flinn Lazier · fastest of 9 · top 5 within 1.5s	1:35.563Flinn Lazier · fastest of 9 · top 5 within 1.7s	126.8Scott Rettich	-6.928squal -6.767s	93.2%qual 93.4%	1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s	1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s	124.1Melvin David Kemper Jr	-4.582squal -4.209s	95.5%qual 95.9%	1:45.032John Kachadurian · fastest of 30 · top 5 within 2.4s	1:45.999John Kachadurian · fastest of 28 · top 5 within 3.0s	106.5John Kachadurian	+3.508squal +3.225s	103.4%qual 103.2%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:43.136Wiley Clinton McMahan · fastest of 38 · top 5 within 1.4s	1:42.860Wiley Clinton McMahan · fastest of 37 · top 5 within 1.6s							1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s	1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s		-1.714squal -1.905s	98.3%qual 98.2%	1:48.618John M Buttermore · fastest of 26 · top 5 within 0.8s	1:48.769John M Buttermore · fastest of 25 · top 5 within 1.2s		+5.909squal +5.482s	105.7%qual 105.3%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:28.528Calvin Stewart · fastest of 14 · top 5 within 3.9s	1:29.853Steven Thompson · fastest of 12 · top 5 within 4.5s							1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s	1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s		-1.931squal -2.485s	97.9%qual 97.2%	1:31.563Preston Calvert · fastest of 22 · top 5 within 0.5s	1:32.691John M Buttermore · fastest of 20 · top 5 within 1.5s		+2.838squal +3.035s	103.2%qual 103.4%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	2:01.824W. Clint McMahan · fastest of 16 · top 5 within 3.0s	2:03.298Matthew Strand · fastest of 15 · top 5 within 4.9s							1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s	1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s		-5.269squal -4.020s	95.7%qual 96.7%	2:00.172Kurt Rezzetano · fastest of 20 · top 5 within 3.2s	2:01.077Kurt Rezzetano · fastest of 19 · top 5 within 2.8s		-2.221squal -1.652s	98.2%qual 98.6%

By track

Track	Events	Typical % of F5	Best	Latest
Road America	4	100.0%1 of 4 with F5	100.0%Runoffs 2020	100.0%Runoffs 2020
Virginia International Raceway	3	100.0%2 of 3 with F5	100.0%Runoffs 2019	100.0%Runoffs 2022
Indianapolis Motor Speedway	2	100.0%	100.0%Runoffs 2017	100.0%Runoffs 2021
Daytona International Speedway	1	100.0%	100.0%Runoffs 2015	100.0%Runoffs 2015
Mid-Ohio Sports Car Course	1	100.0%	100.0%Runoffs 2016	100.0%Runoffs 2016
Sonoma Raceway	1	100.0%	100.0%Runoffs 2018	100.0%Runoffs 2018

About this data

Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of F5'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.