BoP Lab / Buttonwillow Raceway Park

F5 vs F6 vs SRF vs T3 pace at Buttonwillow Raceway Park

Quickest here: T3 1:55.675 Scotty B White, Cal Club 2026 race

F5F6SRFT3solid race · dashed qualifying · slower is lower

	Event	F5			F6				SRF				T3
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs F5	Qual best	Race best	Trap	vs F5	Qual best	Race best	Trap	vs F5
	Cal Club 2026 CALCL262026-02-21												1:55.970Scotty B White · fastest of 4 · top 4 within 10.5s+0.005s (+0.00%)	1:55.675Scotty B White · fastest of 5 · top 5 within 12.1s-0.522s (-0.45%)	137.2Scotty B White+25.7 mph (+23.1%)
21 rule changes (SRF: 3, T3: 18)5 weight · 4 tyres & wheels · 3 suspension & brakes · 3 wording · 6 othershowhide 2026-02-01 T3 Please change 2011-2014 Mustang V6 Spec Line to 2005-2014 #39558other 2026-02-01 T3 Nissan 350Z Weight Request #39598weight -25 lbs 2026-02-01 T3 Allow Alt Bushing Material in Toe Links #39607suspension & brakes 2026-01-01 T3 Request to Allow Spec Mustang to Touring 3 in Appendix M Trim #39196weight -50 lbs 2026-01-01 T3 Tire Help for Spec E9X in T3 #39222tyres & wheels 2026-01-01 T3 SpecE46 Tire Sizing #39292tyres & wheels 2026-01-01 T3 Alternate Placement of Fuse Panel and Electronics Request #39370other 2026-01-01 T3 Clarify T4 Brake Rotor Allowance #39503suspension & brakes 2025-12-01 T3 T3 Ecoboost Mustang clarification #39236suspension & brakes 2025-11-01 T3 Make the S2000 Competitive Again #38470tyres & wheels 2025-11-01 T3 ND Gearset Request for T4 #39166other 2025-11-01 T3 ND Spec Lines Wrong PT#'s #39170weight 2025-10-01 SRF Add HD Oil Cooler #38979other 2025-08-01 T3 Incorrect Touring Heading #38451wording 2025-07-01 T3 correct letter 37421 #38204wording 2025-05-01 T3 S550 Mustang #38061weight -50 lbs 2025-05-01 T3 correct letter 37421 #38204wording 2025-04-01 SRF Driver Safety & Comfort #37966other 2025-04-01 SRF Update SADEV transmission specs #37992other 2025-04-01 T3 SpecE46 Tire Change #37421tyres & wheels 2025-04-01 T3 S197 Mustang V6 in T3 #37594weight -25 lbs
	Cal Club 2025 CALCL252025-02-22												1:55.965Roger Eagleton · fastest of 6 · top 5 within 5.4s	1:56.197Scotty B White · fastest of 6 · top 5 within 3.8s	111.5J. David Orem
236 earlier rule changes on record, in force before Cal Club 2025 (from 2019)51 weight · 36 cars added · 28 suspension & brakes · 24 tyres & wheels · 20 induction · 10 engine · 2 removed · 1 aero · 16 wording · 48 other · F500 Rotax 493 and 593 intake boots: removed Moto Tassinari V3124-873B-2 from 493/593 non-HO allowance, added Moto Tassinari V3120-794A-2 option for non-HO. · F500 Rotax engines now permit Ingi Tech Sparker ignition DCP-CDI-P2 as alternate ECU. · F500 clarifies stepped diameter exhaust headers prohibited except at cylinder head flange area. · F500 Rotax 593 intake boot options clarified; oil injection pump removal now permitted. · F500 Majors and Runoffs cars must install AIM part #X47KPFSOLO2R0 data box mount for Solo or Solo 2. · F5 cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs. · F5 clarifies mechanical shifting only; throttle-cut and flat-shifter devices permitted if driver retains full control. · F5 single-seat open-wheel cars: rigid suspension becomes limited suspension in class definition. · F500 Rotax 593 HO engine now permitted; 875 lbs minimum weight, MA0242SP1020A or MA0242SP1063A restrictor, specific intake boots and piston required. · F500 Suzuki GSXR600 engine years extended from 2003-2013 to 2003-2019. · F5 request to adjust external jetting device cockpit control denied; no rule change made. · F5 cockpit adjustment request response published in Fastrack letter 28359. · F500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm. · F500 Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 minimum weights increase to 900 lbs.showhide 2025-02-01 T3 350z BOP #37427induction 2025-02-01 T3 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added 2025-01-01 T3 Remove spec lines that have expired #37269induction 2025-01-01 T3 Request to Move Spec Mustang to Touring 3 (from T2) #37080cars added 2025-01-01 T3 3.7 Mustangs BoP #37186induction 2024-12-01 T3 Amend TIR Placement on VW #36175induction 2024-12-01 T3 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes 2024-12-01 T3 Fuel Emissions Components #37076engine 2024-12-01 T3 fix brake wording #37129suspension & brakes 2024-12-01 T3 Evaporative emissions systems #37130engine 2024-12-01 T3 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision #37140other 2024-12-01 T3 Move Spec Boxster to T4 #37158cars added 2024-12-01 T3 BMW 320i Spec Line #37204other 2024-12-01 T3 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added 2024-12-01 T3 Request to Classify BMWs #37226cars added 2024-12-01 T3 Make adjustments to the 2015 STI Spec line #37246tyres & wheels 2024-12-01 T3 class a civic #37294cars added 2024-12-01 T3 Older STI in T3 #37300weight -100 lbs 2024-10-01 SRF Update SRF3 Air Filter Rule #36681other 2024-10-01 SRF Update SRF Brake Rotor Thickness #36687suspension & brakes 2024-10-01 SRF Hoosier Tire Decal Placement #36739tyres & wheels 2024-09-01 SRF Protest Fee Clarification #36540wording 2024-09-01 SRF Update to Letter 36619 with new Hoosier Contingency Decal Info #36624tyres & wheels 2024-08-01 SRF Update Rain Tire Rule and Hoosier Decal Placement #36436tyres & wheels 2024-08-01 T3 Honda Civic Si (2017+) #36249weight 2024-08-01 T3 Subaru Reliability Help #36284other 2024-08-01 T3 spec line for 36073 #36338cars added 2024-08-01 T3 36131 #36339cars added 2024-07-01 T3 Mustang T2/T3 #35877other 2024-07-01 T3 T2-T4 Driveshaft Mistake...? #36050weight 2024-07-01 T3 E&O: #35174 (Derek Chan) 350Z Parity Request #36116induction 2024-07-01 T3 B8/8.5 Audi S4 T3 and T2 #36195cars added 2024-07-01 T3 Z4 Roadster Eligibility #36196other 2024-06-01 T3 Global MX5 Tre change #36046tyres & wheels 2024-05-01 T3 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine 2024-05-01 T3 Driveshafts #35916weight 2024-05-01 T3 Audi S4 HST requirement #35918other 2024-03-01 T3 Spec Z Interchange in T3 #34416induction 2024-03-01 T3 please classify 2000-2002 Audi s4 #35306cars added 2024-03-01 T3 Reorganize Spec Lines #35375induction 2024-03-01 T3 370Z Brake Rotor Size Correction #35487suspension & brakes 2024-03-01 T3 T3 V6 Mustang help #35526induction 2024-03-01 T3 Nissan 370Z - Brake System Allowance - Brake Booster #35556suspension & brakes 2024-03-01 T3 Mustang Help #35559induction 2024-03-01 T3 Appeal for Retention of T3 Mazda RX-8 Spec Line (Letter #35378) #35577other 2024-03-01 T3 Request to Keep the Mazda Rx-8 in Touring 3 #35584other 2024-03-01 T3 Subaru WRX (02-05) Appeal #35656other 2024-02-01 T3 15-18 Golf R Alignment with Existing GTI and R Speclines #35235tyres & wheels 2024-02-01 T3 More Car Lightening Stuff #35319weight 2024-02-01 T3 Open Strut Tower Brace Options for Ford Mustang V6 (11-14) #35322suspension & brakes 2024-02-01 T3 Mustang ecoboost #35351induction 2024-02-01 T3 Inclusion of B-C spec cars in T4 #35374other 2024-02-01 T3 T2-T4 Set expiration dates on spec lines #35378induction 2024-01-01 SRF Update SRF Rain / Brake Rule #34706suspension & brakes 2024-01-01 SRF Update SRF Brake Light Rule v1 #34853suspension & brakes 2024-01-01 SRF SRF / SRF3 Rule Updates #35268weight 2024-01-01 T3 T3 Solstice Brakes #35106suspension & brakes 2024-01-01 T3 350Z Parity Request #35174weight 2024-01-01 T3 Requested Update of Model Years of 370Z #35231other 2024-01-01 T3 Update Request for 2010 Mustang GT 4.6 #35234other 2024-01-01 T3 SE46 Continued Parity/ Cold Air Intake request #35267induction -50 lbs 2024-01-01 T3 Please help the Subaru STIs. #35278weight +100 lbs 2023-12-01 T3 Porsche Cayman Transmissions and Ratios #34891weight 2023-12-01 T3 2006-10 Volkswagen GTI - Weight Reduction request and KO4 Turbo #34414weight 2023-12-01 T3 Adding Model Years to T3 Golf R Spec Line #34612other 2023-12-01 T3 Rear Camber Arms for T3 VW Golf R #34613suspension & brakes 2023-12-01 T3 Classing Spec E90 Cars in SCCA #34791cars added 2023-12-01 T3 TIR location requirement in VW Golf Spec lines #35048induction 2023-10-01 SRF SRF Radiator Rule Update #34805other 2023-08-01 T3 2012-2013 Golf R - added to T3 #34413cars added 2023-08-01 T3 Rules Clarification for Mazda RX8 Spec Line #34395weight 2023-08-01 T3 rule book corrections #34437wording 2023-08-01 T3 Allowing 255 Tire Width for Nissan 350z #34471tyres & wheels 2023-08-01 T3 Ride Height Correction for the T3 Solstice. #34615suspension & brakes 2023-07-01 T3 2016+ Camaro 1LE - Max Wheel Diameter #34003tyres & wheels 2023-07-01 T3 2022 Toyota GR Cup for T3 #34448removed 2023-06-01 SRF Hoosier SRF Wet Front Tire Rule Update #34189tyres & wheels 2023-06-01 T3 S550 Reconcile With S197 #34093weight -75 lbs 2023-06-01 T3 SE46 Parity Help #34178weight -50 lbs 2023-06-01 T3 2022 Toyota GR Cup for T3 discussion #34234cars added 2023-05-01 SRF Update SRF Front W2 Rain Tire Part Number #34118tyres & wheels 2023-05-01 T3 Request Spec E46 in T3 Weight Adjustment #33897weight -25 lbs 2023-05-01 T3 E36 2.5L 323is Weight Reduction #33975weight 2023-05-01 T3 Update SpecE46 Spec Line to Current SpecE46 Ruleset #34016other 2023-04-01 T3 Request to all ECS Tuning inner-cooler to 06-10 VW GTI spec #33769other 2023-03-01 SRF Update SRF Brake Rule #33469suspension & brakes 2023-03-01 T3 T3 Boxster S GCR request #33687tyres & wheels 2023-03-01 T3 OEM VW Steering Spindle Replacements 06-10 VW GTI and Jetta #33732other 2023-03-01 T3 BMW 320I intercooler #33762other 2023-02-01 T3 Request to classify 2014 Base Cayman #33159cars added 2023-02-01 T3 Mustang OEM Grill Request #33333other 2023-02-01 T3 Hyundai Classification #33498cars added 2023-02-01 T3 Adjustable Rear Camber Arms for VW (All Generations) #33572suspension & brakes 2023-01-01 T3 350z SPC Upper Control Arm Safety Concerns #33020weight 2023-01-01 T3 Request Help for 350z #33379weight -100 lbs 2023-01-01 T3 Ecoboost Acknowledgement #33506induction 2023-01-01 T3 Touring (T2-T5) Category #33617tyres & wheels 2023-01-01 T3 ENO 9.1.9.2.D.1.e.1.a. #33651other 2022-12-01 T3 Solstice GXP in T3 #33501weight 2022-10-01 T3 Another 2022 BRZ/86 T3 request #32945weight +225 lbs 2022-09-01 F5 Intake Boots Correction #33028wordingwordingF500 Rotax 493 and 593 intake boots: removed Moto Tassinari V3124-873B-2 from 493/593 non-HO allowance, added Moto Tassinari V3120-794A-2 option for non-HO. 2022-09-01 T3 S2000 Hard Top Clarification #32779wording 2022-09-01 T3 T3 Pontiac Solstice- #33081induction 2022-08-01 F5 Ensure availability of ECU for Rotax engines #32695engineadded · engineF500 Rotax engines now permit Ingi Tech Sparker ignition DCP-CDI-P2 as alternate ECU. 2022-07-01 F5 Clarify stepped exhaust header references #32743wordingwordingF500 clarifies stepped diameter exhaust headers prohibited except at cylinder head flange area. 2022-07-01 T3 Classify Car #32691cars added 2022-07-01 T3 2022 BRZ Sway bar and lip spoiler. #32703aero 2022-06-01 F5 593 carb boot availability and oil pump clarification #32527wordingwordingF500 Rotax 593 intake boot options clarified; oil injection pump removal now permitted. 2022-06-01 SRF SRF Tire Rule Update #32614tyres & wheels 2022-06-01 SRF Brake, seal, and air filter clarifications #32670suspension & brakes 2022-05-01 T3 correct wording #31750weight 2022-05-01 T3 2005-2008 Porsche Boxster 2.7 #31999cars added 2022-05-01 T3 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes 2022-05-01 T3 2022 Subaru BRZ and Toyota 86 twins #32483weight 2022-04-01 T3 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine 2022-04-01 T3 T3 Mustang V8/V6 #31959weight -50 lbs 2022-04-01 T3 Subaru STI (15-20) Missing part #32294other 2022-03-01 F5 E&O class name #32194otheraddedF500 Majors and Runoffs cars must install AIM part #X47KPFSOLO2R0 data box mount for Solo or Solo 2. 2022-03-01 T3 Touring 3 BOP adjustments for 2022 #31481weight +75 lbs 2022-03-01 T3 BMW 330i Minimum Comp Weight #31606weight -60 lbs 2022-03-01 T3 Adjust T3 370Z #31748weight +50 lbs 2022-03-01 T3 TIR changes for FWD T3 models #31825induction 2022-03-01 T3 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes 2022-03-01 T3 BRZ vs BRZ TS #32022tyres & wheels 2022-03-01 T3 Remove StopTech 4 piston BBK, allow any 4 Piston Kit - VW GTI #33082weight 2022-01-01 F5 Data Box Mounting Plate #31638otheraddedF5 cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs. 2022-01-01 T3 Request FRS/BRZ/86 T3 Weight Reduction #30818weight -75 lbs 2022-01-01 T3 Request to Classify 2022 Toyota 86 / Subaru in T3 & T4 #30931cars added 2022-01-01 T3 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes 2022-01-01 T3 Please Adjust Years Allowed for BMW 335i to 07-10, not 08-13 #31530other 2022-01-01 T3 Please Adjust Years Allowed for BMW 135i to 08-10, not 08-13 #31531other 2022-01-01 T3 Request to clarify radiator hoses #31682wording 2022-01-01 T3 T3 Nissan Z Suspension Update #31728other 2022-01-01 T3 Clarify Permitted/Allowed #31743suspension & brakes 2021-12-01 SRF Three Updates to SRF Rules #31523weight 2021-12-01 T3 Request to correct model years BMW Z4 M Coupe #31371wording 2021-12-01 T3 Correct letter the 31327 #31563weight +150 lbs 2021-11-01 T3 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added 2021-11-01 T3 Request Weight Reduction 323is #30765weight -100 lbs 2021-11-01 T3 Class Newer STI in T3 #31327cars added 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wordingwordingF5 clarifies mechanical shifting only; throttle-cut and flat-shifter devices permitted if driver retains full control. 2021-08-01 F5 Request to correct terminology #30976wordingwordingF5 single-seat open-wheel cars: rigid suspension becomes limited suspension in class definition. 2021-08-01 SRF SRF Wet Tires #30849tyres & wheels 2021-08-01 SRF SADEV-SRF3 Transmission #30926other 2021-08-01 SRF SRF Update Maintenance, Repairs and Seals #30961engine 2021-07-01 T3 Follow-up to letter 29797-Porsche Spec Boxster in T3 Adjustment #30144weight -50 lbs 2021-07-01 T3 Wheel Size #30677tyres & wheels 2021-07-01 T3 Request weight adder to be applied to the Global Cup Miata ND2 #30730weight 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712cars addedaddedF500 Rotax 593 HO engine now permitted; 875 lbs minimum weight, MA0242SP1020A or MA0242SP1063A restrictor, specific intake boots and piston required. 2021-06-01 SRF SRF3 Alternator Pulley #30684weight 2021-06-01 T3 Civic Type R Brake Rotors #29817suspension & brakes 2021-05-01 T3 Requesting Variance on Hardtop #30093other 2021-05-01 T3 07-09 and 10-13 Mazdaspeed 3 Fuel Pump #30154other 2021-04-01 T3 Request consistency review in GCR #30263other 2021-04-01 T3 Request to classify 2006-2008 Cayman #30315cars added 2021-03-01 SRF Mandatory identification: #30223engine 2021-03-01 T3 2020 T3 Suggested Changes #30002weight -50 lbs 2021-02-01 T3 2021 Toyota Supra #29567cars added 2021-02-01 T3 Chevrolet Camaro LT-I4 Turbo 1LE (2019-) Model Year to 2016- #30090induction 2021-02-01 T3 Fix T2 Mustang spec line #30106other 2021-02-01 T3 Spec Boxster Tire Size #30159tyres & wheels 2021-01-01 T3 Request to Classify BMW M2 CS #29523cars added 2021-01-01 T3 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5 #29681other 2021-01-01 T3 350Z Rear Caliper Replacement #29710other 2021-01-01 T3 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement #29860other 2021-01-01 T3 Cap year range on all 86s #29908other 2020-12-01 SRF SRF Shocks, Springs and Ride Height. #29688suspension & brakes 2020-12-01 T3 Alfa Romeo 4C Launch Edition #29531other 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engineadded · engineF500 Suzuki GSXR600 engine years extended from 2003-2013 to 2003-2019. 2020-10-01 T3 Request to Classify Honda Civic Type R in T3 #27840cars added 2020-08-01 T3 Request to classify 2009 Honda Accord v6 manual #28913cars added 2020-07-01 F5 Request for Cockpit Adjustment of External Jetting Devices #28359wordingunclearF5 request to adjust external jetting device cockpit control denied; no rule change made. 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 #28875wordingunclearF5 cockpit adjustment request response published in Fastrack letter 28359. 2020-07-01 T3 SADEV Sequential Gearbox #28763other 2020-07-01 T3 Request for competition adjustment for the MK5 GTI FSI engine #28802engine 2020-07-01 T3 Request to Add a Vehicle to the Roster (contd.) #27698other 2020-06-01 T3 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added 2020-06-01 T3 Request Nissan 350Z Part Number change #28145induction 2020-05-01 SRF SRF Bump Stop Correction #27019suspension & brakes 2020-05-01 T3 2015 + Ford EcoBoost Mustang Sway Bars #28398suspension & brakes 2020-05-01 T3 Z3M Roadster Weight #28437weight 2020-03-01 T3 Clarify 05-10 V8 Mustang Spring Rates Wording/Adjust Restrictor #28238induction 2020-03-01 T3 Correct Touring 3 05-10 Mustang final drive #28288wording 2020-02-01 T3 2006 BMW E90 330i Sedan Classification #26663weight 2020-02-01 T3 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs 2020-02-01 T3 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added 2020-02-01 T3 Request for 2005 Subaru STI Changes #27658tyres & wheels +50 lbs 2020-02-01 T3 Request to Classify 2017 Ford Fiesta ST #27700cars added 2020-01-01 F5 Change 600cc restrictor size #27883inductionslower · inductionF500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm. 2020-01-01 T3 Clarification of On-Board Fire System for T2 #27183wording 2020-01-01 T3 Mustang Ecoboost and GT Transmission #27439other 2020-01-01 T3 Nissan 350Z HR Engine Restrictor Plate/Minimum Weight #27442weight +50 lbs 2020-01-01 T3 Request help for the GMX5 #27572tyres & wheels 2020-01-01 T3 Request for 05-10 Mustang GT Suspension Upgrades #27777weight 2020-01-01 T3 Please Update the BMW SpecE46 Rules #27781tyres & wheels 2020-01-01 T3 Request for 02-03 WRX Spec Line Parts #27864weight -100 lbs 2020-01-01 T3 T4 RX8 Classification Error #27902wording 2020-01-01 T3 Request to add Toyota 86 GT to Spec Line #27910other 202-01-01 SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes 2019-12-01 SRF SRF Tire Warmer Rule #27622tyres & wheels 2019-12-01 SRF SRF / SRF3 Nose Weight Reduction #27706weight 2019-12-01 SRF SRF / SRF3 Majors & Regional Class Updates #27723other 2019-12-01 T3 Request to add 2018 Subaru BRZ in T3 #27253other 2019-10-01 T3 Request Mazda NC MX-5 alternate transmission gear ratios #27155other 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbsslower · weightF500 Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 minimum weights increase to 900 lbs. 2019-08-31 T3 Request spare tire/wheel clarification #27012tyres & wheels 2019-08-01 T3 Request guidance for 2014-2017 MK7 Volkswagen GTI #26866weight 2019-07-01 SRF SRF Dash Windscreen Kit #27028other 2019-07-01 T3 Request BMW e36 M3 sway bar and links #26885suspension & brakes 2019-05-31 T3 Request to properly class base Porsche Cayman #26276weight 2019-05-01 T3 Request to classify a 2019 Chevrolet Camaro LT-I4 Turbo 1LE #25731cars added 2019-05-01 T3 T3 Civic Si weight change #26294weight 2019-05-01 T3 Class Civic Si 2017+ w/ alternate cage #26449cars added 2019-05-01 T3 Classify 2014-2017 MK7 Volkswagen GTI for T3 #26695cars added 2019-04-01 T3 Request to allow E36 M3 in T3 prepared to BMWCCA I sport #25195cars added 2019-03-01 T3 Request Mustang GT Limited Prep 2018 Classification #24431cars added 2019-03-01 T3 Classify 2015+ WRX #25832cars added 2019-03-01 T3 Correct Mazda MX-5 Hard Top Notes #26137weight 2019-03-01 T3 Request to allow T3 06-15 Miata 17x8 wheels #26161tyres & wheels 2019-03-01 T3 Request T3 06-15 Miata header #26162other 2019-03-01 T3 Request Pontiac GXP same allowances to Saturn Sky #26175weight 2019-03-01 T3 Consider opening class rules to allow any thermostat #26187wording 2019-03-01 T3 2005-2009 Legacy GT/Spec B #26384cars added 2019-03-01 T3 Cap 2016 Mazda Miata year at 2018 #26388other 2019-02-01 T3 Request correction on brake sizes #26170suspension & brakes 2019-01-01 T3 Errors, Omissions, and Updates (Various) #22414weight 2019-01-01 T3 Request to update SpecE46 Appendix N. with 2019 Rules #25722removed 2019-01-01 T3 Request Alternative Nissan Brake Parts - 350Z #25747suspension & brakes 2019-01-01 T3 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight 2019-01-01 T3 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes 2019-01-01 T3 Additional weight adjustments for T3 cars T3 weight loss #25803weight 2019-01-01 T3 Request for Alternate EcoBoost Mustang Brakes #25813suspension & brakes 2019-01-01 T3 Request to Add the FR-S/86 and BRZ Spec Lines to T3 #25888weight 2019-01-01 T3 Request to Clarify BMW SpecE46 Tire Verbiage #26027tyres & wheels

Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.