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BoP Lab / Classes / B-Spec

B-Spec vs AS vs FM pace at every track

Lap times across years say as much about the weather as the class. % of B-Spec is each class's best lap as a share of B-Spec'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)
vsAS×B-Spec×EP+FA+FC+FE2+FF+vsFM×FP+FV+FX+GT1+GT2+GTX+HP+P+P2+SM+SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 50 inactive classes
Series
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: B-Spec 100.0% of B-Spec John Heinricy, Daytona International Speedway Runoffs 2015 race · AS 81.5% of B-Spec Tom Sloe, Daytona International Speedway Runoffs 2015 qualifying · FM 78.9% of B-Spec Joseph Burton-Harris, Daytona International Speedway Runoffs 2015 qualifying

1:402:002:202:403:0012 rule changes between Runoffs 2018 and Runoffs 201912 ▾33 rule changes between Runoffs 2019 and Runoffs 202033 ▾36 rule changes between Runoffs 2020 and Runoffs 202136 ▾19 rule changes between Runoffs 2021 and Runoffs 202219 ▾25 rule changes between Runoffs 2022 and Runoffs 202325 ▾41 rule changes between Runoffs 2023 and Runoffs 202441 ▾34 rule changes between Runoffs 2024 and Runoffs 202534 ▾29 rule changes between Runoffs 2025 and Runoffs 202629 ▾B-Spec race best at Runoffs 2015: 2:29.465 (John Heinricy)B-Spec race best at Runoffs 2016: 1:46.930 (John Heinricy)B-Spec race best at Runoffs 2017: 2:04.050 (David Daughtery)B-Spec race best at Runoffs 2018: 1:59.852 (Jake Pipal)B-Spec race best at Runoffs 2019: 2:22.094 (David Daughtery)B-Spec race best at Runoffs 2020: 2:52.847 (Riley Salyer)B-Spec race best at Runoffs 2021: 2:03.971 (Steve Introne)B-Spec race best at Runoffs 2022: 2:23.819 (Riley Salyer)B-Spec race best at Runoffs 2023: 2:23.732 (Richard Hromin)B-Spec race best at Runoffs 2024: 2:51.889 (Rob Piekarczyk)B-Spec race best at Runoffs 2025: 2:53.613 (Daniel Conway)B-Spec race best at Runoffs 2026: 2:51.633 (Josh Schmidt)B-Spec qualifying best at Runoffs 2015: 2:29.366 (John Heinricy)B-Spec qualifying best at Runoffs 2016: 1:46.865 (David Daughtery)B-Spec qualifying best at Runoffs 2017: 2:03.166 (David Daughtery)B-Spec qualifying best at Runoffs 2018: 1:59.321 (Oscar Jackson)B-Spec qualifying best at Runoffs 2019: 2:22.368 (Frank Schwartz)B-Spec qualifying best at Runoffs 2020: 2:52.033 (David Daughtery)B-Spec qualifying best at Runoffs 2021: 2:03.121 (John Phillips)B-Spec qualifying best at Runoffs 2022: 2:22.945 (Steve Introne)B-Spec qualifying best at Runoffs 2023: 2:22.707 (Riley Salyer)B-Spec qualifying best at Runoffs 2024: 2:52.027 (Daniel Conway)B-Spec qualifying best at Runoffs 2025: 2:52.211 (Josh Schmidt)B-Spec qualifying best at Runoffs 2026: 2:51.987 (Josh Schmidt)AS race best at Runoffs 2015: 2:02.922 (Andy McDermid)AS race best at Runoffs 2016: 1:33.424 (Edward Hosni)AS race best at Runoffs 2017: 1:51.507 (Bryan Long)AS race best at Runoffs 2018: 1:50.345 (John Heinricy)AS race best at Runoffs 2019: 2:03.900 (James Jost)AS race best at Runoffs 2020: 2:27.668 (Gregory Eaton)AS race best at Runoffs 2021: 1:50.606 (Gregory Eaton)AS race best at Runoffs 2022: 2:04.578 (Gregory Eaton)AS race best at Runoffs 2023: 2:04.120 (Gregory Eaton)AS race best at Runoffs 2024: 2:26.429 (Gregory Eaton)AS race best at Runoffs 2025: 2:29.232 (Gregory Eaton)AS race best at Runoffs 2026: 2:28.471 (Andrew McDermid)AS qualifying best at Runoffs 2015: 2:01.746 (Tom Sloe)AS qualifying best at Runoffs 2016: 1:30.651 (Tom Sloe)AS qualifying best at Runoffs 2017: 1:45.220 (James Jost)AS qualifying best at Runoffs 2018: 1:47.782 (Andrew McDermid)AS qualifying best at Runoffs 2019: 2:02.938 (Gregory Eaton)AS qualifying best at Runoffs 2020: 2:27.045 (Gregory Eaton)AS qualifying best at Runoffs 2021: 1:50.427 (Drew Cattell)AS qualifying best at Runoffs 2022: 2:02.162 (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 2:03.082 (Daniel Richardson)AS qualifying best at Runoffs 2024: 2:26.578 (Gregory Eaton)AS qualifying best at Runoffs 2025: 2:26.792 (Andrew McDermid)AS qualifying best at Runoffs 2026: 2:26.911 (Andrew McDermid)FM race best at Runoffs 2015: 1:58.029 (Joseph Burton-Harris)FM race best at Runoffs 2016: 1:27.922 (Jacob Loomis)FM race best at Runoffs 2017: 1:41.146 (Jarret Voorhies)FM race best at Runoffs 2018: 1:37.909 (Bryce Cornet)FM race best at Runoffs 2019: 2:15.816 (Bryce Cornet)FM qualifying best at Runoffs 2015: 1:57.804 (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 1:26.043 (Jacob Loomis)FM qualifying best at Runoffs 2017: 1:41.231 (Jarret Voorhies)FM qualifying best at Runoffs 2018: 1:37.598 (Bryce Cornet)FM qualifying best at Runoffs 2019: 1:55.124 (Bryce Cornet)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
B-SpecASFMsolid race · dashed qualifying · slower is lower
80%85%90%95%100%12 rule changes between Runoffs 2018 and Runoffs 201912 ▾33 rule changes between Runoffs 2019 and Runoffs 202033 ▾36 rule changes between Runoffs 2020 and Runoffs 202136 ▾19 rule changes between Runoffs 2021 and Runoffs 202219 ▾25 rule changes between Runoffs 2022 and Runoffs 202325 ▾41 rule changes between Runoffs 2023 and Runoffs 202441 ▾34 rule changes between Runoffs 2024 and Runoffs 202534 ▾29 rule changes between Runoffs 2025 and Runoffs 202629 ▾B-Spec race best at Runoffs 2015: 100.0% of B-Spec's (John Heinricy)B-Spec race best at Runoffs 2016: 100.0% of B-Spec's (John Heinricy)B-Spec race best at Runoffs 2017: 100.0% of B-Spec's (David Daughtery)B-Spec race best at Runoffs 2018: 100.0% of B-Spec's (Jake Pipal)B-Spec race best at Runoffs 2019: 100.0% of B-Spec's (David Daughtery)B-Spec race best at Runoffs 2020: 100.0% of B-Spec's (Riley Salyer)B-Spec race best at Runoffs 2021: 100.0% of B-Spec's (Steve Introne)B-Spec race best at Runoffs 2022: 100.0% of B-Spec's (Riley Salyer)B-Spec race best at Runoffs 2023: 100.0% of B-Spec's (Richard Hromin)B-Spec race best at Runoffs 2024: 100.0% of B-Spec's (Rob Piekarczyk)B-Spec race best at Runoffs 2025: 100.0% of B-Spec's (Daniel Conway)B-Spec race best at Runoffs 2026: 100.0% of B-Spec's (Josh Schmidt)B-Spec qualifying best at Runoffs 2015: 100.0% of B-Spec's (John Heinricy)B-Spec qualifying best at Runoffs 2016: 100.0% of B-Spec's (David Daughtery)B-Spec qualifying best at Runoffs 2017: 100.0% of B-Spec's (David Daughtery)B-Spec qualifying best at Runoffs 2018: 100.0% of B-Spec's (Oscar Jackson)B-Spec qualifying best at Runoffs 2019: 100.0% of B-Spec's (Frank Schwartz)B-Spec qualifying best at Runoffs 2020: 100.0% of B-Spec's (David Daughtery)B-Spec qualifying best at Runoffs 2021: 100.0% of B-Spec's (John Phillips)B-Spec qualifying best at Runoffs 2022: 100.0% of B-Spec's (Steve Introne)B-Spec qualifying best at Runoffs 2023: 100.0% of B-Spec's (Riley Salyer)B-Spec qualifying best at Runoffs 2024: 100.0% of B-Spec's (Daniel Conway)B-Spec qualifying best at Runoffs 2025: 100.0% of B-Spec's (Josh Schmidt)B-Spec qualifying best at Runoffs 2026: 100.0% of B-Spec's (Josh Schmidt)AS race best at Runoffs 2015: 82.2% of B-Spec's (Andy McDermid)AS race best at Runoffs 2016: 87.4% of B-Spec's (Edward Hosni)AS race best at Runoffs 2017: 89.9% of B-Spec's (Bryan Long)AS race best at Runoffs 2018: 92.1% of B-Spec's (John Heinricy)AS race best at Runoffs 2019: 87.2% of B-Spec's (James Jost)AS race best at Runoffs 2020: 85.4% of B-Spec's (Gregory Eaton)AS race best at Runoffs 2021: 89.2% of B-Spec's (Gregory Eaton)AS race best at Runoffs 2022: 86.6% of B-Spec's (Gregory Eaton)AS race best at Runoffs 2023: 86.4% of B-Spec's (Gregory Eaton)AS race best at Runoffs 2024: 85.2% of B-Spec's (Gregory Eaton)AS race best at Runoffs 2025: 86.0% of B-Spec's (Gregory Eaton)AS race best at Runoffs 2026: 86.5% of B-Spec's (Andrew McDermid)AS qualifying best at Runoffs 2015: 81.5% of B-Spec's (Tom Sloe)AS qualifying best at Runoffs 2016: 84.8% of B-Spec's (Tom Sloe)AS qualifying best at Runoffs 2017: 85.4% of B-Spec's (James Jost)AS qualifying best at Runoffs 2018: 90.3% of B-Spec's (Andrew McDermid)AS qualifying best at Runoffs 2019: 86.4% of B-Spec's (Gregory Eaton)AS qualifying best at Runoffs 2020: 85.5% of B-Spec's (Gregory Eaton)AS qualifying best at Runoffs 2021: 89.7% of B-Spec's (Drew Cattell)AS qualifying best at Runoffs 2022: 85.5% of B-Spec's (Kurt Rezzetano)AS qualifying best at Runoffs 2023: 86.2% of B-Spec's (Daniel Richardson)AS qualifying best at Runoffs 2024: 85.2% of B-Spec's (Gregory Eaton)AS qualifying best at Runoffs 2025: 85.2% of B-Spec's (Andrew McDermid)AS qualifying best at Runoffs 2026: 85.4% of B-Spec's (Andrew McDermid)FM race best at Runoffs 2015: 79.0% of B-Spec's (Joseph Burton-Harris)FM race best at Runoffs 2016: 82.2% of B-Spec's (Jacob Loomis)FM race best at Runoffs 2017: 81.5% of B-Spec's (Jarret Voorhies)FM race best at Runoffs 2018: 81.7% of B-Spec's (Bryce Cornet)FM race best at Runoffs 2019: 95.6% of B-Spec's (Bryce Cornet)FM qualifying best at Runoffs 2015: 78.9% of B-Spec's (Joseph Burton-Harris)FM qualifying best at Runoffs 2016: 80.5% of B-Spec's (Jacob Loomis)FM qualifying best at Runoffs 2017: 82.2% of B-Spec's (Jarret Voorhies)FM qualifying best at Runoffs 2018: 81.8% of B-Spec's (Bryce Cornet)FM qualifying best at Runoffs 2019: 80.9% of B-Spec's (Bryce Cornet)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
B-SpecASFMsolid race · dashed qualifying · each class's best lap as a share of B-Spec's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventB-SpecASFM
Qual best Race best Trap Qual best Race best Trap vs B-Spec % of B-Spec Qual best Race best Trap vs B-Spec % of B-Spec 
Road America Runoffs 20262026-09-282:51.987Josh Schmidt · fastest of 23 · top 5 within 1.3s-0.224s (-0.13%)2:51.633Josh Schmidt · fastest of 22 · top 5 within 1.7s-1.980s (-1.14%)112.5Ricky Holmstrom-0.2 mph (-0.1%)2:26.911Andrew McDermid · fastest of 8 · top 5 within 3.4s+0.119s (+0.08%)2:28.471Andrew McDermid · fastest of 8 · top 5 within 2.4s-0.761s (-0.51%)151.0Andrew McDermid-0.6 mph (-0.4%)-23.162squal -25.076s86.5%qual 85.4%
29 rule changes (B-Spec: 16, AS: 13)10 weight · 5 suspension & brakes · 4 engine · 2 induction · 2 tyres & wheels · 1 removed · 5 othershowhide
  • AS 2016+ Camaro Spec Line Full Prep #39646tyres & wheels
  • AS Consideration of Pirelli P Zero Trofeo Track for AS Competition #40495tyres & wheels
  • AS Change in 9.1.6.D.4.d.5 in Suspension Mounting Points #40094other
  • AS Re-Add 4.6L 4v 96-04 Mustang Cobra #40239weight
  • AS Errors and Omissions #40532weight
  • AS Clarification for LM7 Holley Carburetor #40167engine
  • B-Spec ECU Location in Mazda2 #40034engine
  • B-Spec Allow Cars With Combined Brake/Clutch Reservoir to Separate. #40122suspension & brakes
  • B-Spec Race Memo RM 26-01 B-Spec Mini Cooper Weight Adjustments with OEM #40070weight
  • AS Header Information Update for EFI Engine Build Sheets #39886engine
  • AS Errors and Omissions #39933weight
  • AS Re-Organization of AS Spec lines for 2026 #39887removed
  • B-Spec Add Getrag GS5BG Transmisson Ratios for Mini R50 #39416suspension & brakes
  • B-Spec Exhaust Rules Update #39669other
  • B-Spec Please reinstate KW suspension for R56 #39727other
  • B-Spec Add approved replacement catalysts #39817other
  • B-Spec Yaris/Versa catalyst removal #39818other
  • AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055weight
  • B-Spec C-Spec Rear Sway Bars #39652suspension & brakes
  • AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501induction
  • B-Spec Notes section cleanup #39062weight
  • B-Spec 2026 BOP Recommendations #39475weight +25 lbs
  • B-Spec Expire NLA Mazda 2 Headers #39582weight
  • AS 1994 Mustang Spec Line Request #39104engine
  • AS Cadillac CTS-V BOP Weight Change #38640weight -50 lbs
  • B-Spec Alternate Shift Cable Bushings and Rear Spring Seats #38472suspension & brakes
  • B-Spec Fiesta BOP Adjustment #38847weight +55 lbs
  • B-Spec Request to Remove Rear Shock From Spec Line Hyundai Accents/Kia #39017suspension & brakes
  • B-Spec Update Honda Fit MT (07-08) Runoffs Eligibility #39060induction
Road America Runoffs 20252025-09-292:52.211Josh Schmidt · fastest of 19 · top 5 within 0.8s+0.184s (+0.11%)2:53.613Daniel Conway · fastest of 18 · top 5 within 0.4s+1.724s (+1.00%)112.7Stewart Black-0.4 mph (-0.3%)2:26.792Andrew McDermid · fastest of 11 · top 5 within 3.9s+0.214s (+0.15%)2:29.232Gregory Eaton · fastest of 10 · top 5 within 4.0s+2.803s (+1.91%)151.5Andrew McDermid+1.9 mph (+1.3%)-24.381squal -25.419s86.0%qual 85.2%
34 rule changes (B-Spec: 23, AS: 11)7 induction · 6 engine · 6 weight · 5 suspension & brakes · 1 cars added · 1 wording · 8 othershowhide
  • B-Spec Remove Asterisk from Rule 9 #38768other
  • B-Spec Disabling 2 Pedal Shutdown #38354engine
  • B-Spec Update Honda Fit MT (07-08) Intake Allowance #38530induction
  • AS RE: Previous Letter 37695 Update #38245weight -75 lbs
  • AS Errors and Omissions #38234engine
  • B-Spec Add Sedan spec lines for Hyundai & Kia #37537cars added
  • B-Spec Shifter Bushing Questions. #38048suspension & brakes
  • B-Spec Add Weapon R Intake to Honda Fit MT (09-14) Spec Line #38306induction
  • B-Spec Update Rule 46 #38307suspension & brakes
  • AS Errors and Omission #38055induction
  • AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197engine
  • B-Spec Correct Hyundai/Kia Model Years #37943wording
  • B-Spec 07-08 Honda Fit MT Requests #37974weight +50 lbs
  • B-Spec Add B14 Kit Part # to Honda Fit (07-08) Spec line #38010other
  • AS Flotek Head Plunge Cut Inconsistencies #37502other
  • AS Notes clean up #37693weight
  • B-Spec 2025 BOP Recommendations #37520weight
  • B-Spec Hyundai/Toyota Factory Rear Disc Models #37534weight
  • B-Spec Request to Update the Spec line for Hyundai Accent and Kia Rio #37880suspension & brakes
  • AS Race memo #37902engine
  • B-Spec Toyota Yaris Hatchback (12-18) rear disc brakes #37530suspension & brakes
  • B-Spec Yaris Speed Sensor #37536other
  • B-Spec Set Expiration Date For Fiat 500 #37689other
  • B-Spec Remove Redundant Language from Notes Sections #37337induction
  • B-Spec Expire designated spec lines #37517other
  • B-Spec Set expiration date for Nissan Micra Cup Cars (Canadian) #37519other
  • AS Increase Coyote Engine Restrictor to 80mm #36177induction
  • AS Performance Pack for 2015+ Mustang #36867weight
  • AS Gear Ratios #37131engine
  • AS ECU specs for LS engine #37208engine
  • B-Spec Remove wheelbase from spec lines and replace with Restrictor #36074induction
  • B-Spec Bilstein Rear Shock Request for Hyundai Accent/Kia Rio #36965suspension & brakes
  • B-Spec Scion IA/Toyota Yaris/Mazda 2 DY chassis suspension #35780other
  • B-Spec Clean up 07-08 Honda Fit AT Notes Section #36542induction
Road America Runoffs 20242024-10-012:52.027Daniel Conway · fastest of 25 · top 5 within 0.7s-0.006s (-0.00%)2:51.889Rob Piekarczyk · fastest of 25 · top 5 within 0.6s-0.958s (-0.55%)113.1Joe McClughan+1.5 mph (+1.4%)2:26.578Gregory Eaton · fastest of 18 · top 5 within 2.6s-0.467s (-0.32%)2:26.429Gregory Eaton · fastest of 18 · top 5 within 2.5s-1.239s (-0.84%)149.6Gregory Eaton+0.4 mph (+0.3%)-25.460squal -25.449s85.2%qual 85.2%
41 rule changes (B-Spec: 30, AS: 11)7 cars added · 6 tyres & wheels · 5 suspension & brakes · 4 engine · 4 weight · 3 induction · 2 removed · 1 wording · 9 othershowhide
  • AS Mustang transmission ratios #36662engine
  • B-Spec Update Tire Rules #35984tyres & wheels
  • B-Spec BOP help for the automatic B-Specs #36161weight -50 lbs
  • B-Spec Require hood pins #36233other
  • B-Spec Sonic Caliper Pistons #36238suspension & brakes
  • B-Spec Clean up (15-19) Honda Fit MT & CVT Notes Sections #36068induction
  • B-Spec Set expiration date for Nissan Versa (09-11) #36069other
  • B-Spec Delete Redundant Rule 25 #36075removed
  • B-Spec Correct error for rear brakes of Hyundai/Kia #36174suspension & brakes
  • AS Request for Classification of 2018-2023 mustang In #35764cars added
  • B-Spec Add B14 Kit Part # to Sonic Spec line In #35969induction
  • B-Spec Eliminate redundant sway bar end link part #s from notes In #35970suspension & brakes
  • B-Spec Update Fiat 500 Spec line In #35990other
  • B-Spec Update (15-19) Honda Fit #36067weight +25 lbs
  • AS 6th gen Camaro limited prep #35733cars added
  • AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK #35825cars added
  • AS Full Prep Head #35891other
  • B-Spec Delete trim levels/update language for spec lines #35746other
  • B-Spec Wheel Rules #36066tyres & wheels
  • AS Restricted Prep Aftermarket Parts Request #35682other
  • AS Allowance of 11 #35824tyres & wheels
  • B-Spec Change restrictor from 30mm to 31mm (2015+ Honda Fit) and add 50# #34857induction
  • B-Spec Wheel Offset and Spacer Revision #35466tyres & wheels
  • B-Spec Set Expiration Date for Unused Spec Lines #35742engine
  • AS Request to Classify 1970-1981 Camaro and Firebird in AS #33659cars added
  • AS Fuel Cell 12 #34194other
  • AS Please Classify the 6th Gen Into AS. #35448cars added
  • AS spec lines #35713cars added
  • B-Spec BOP Adjustment for Yaris iA, 2020+ Versa, and 07-08 Honda Fit #35382weight -125 lbs
  • B-Spec 07-08 Honda Fit Rear Sway Bar part # #35473suspension & brakes
  • B-Spec Eliminate Redundant Trans Cooler Rule #35353wording
  • B-Spec Fix Sonic Hatchback MT Spec Line #35371other
  • B-Spec Split Spec Line of Automatic and Manual 2nd Gen (09-14) Fit #35251cars added
  • B-Spec Equalize Mazda 2 Headers and clean up spec line #35259weight
  • B-Spec Rear Sway Bar Request for Nissan Versa and Versa Note 2013- #35323suspension & brakes
  • B-Spec B-Spec Hankook Tire for Regionals #35055tyres & wheels
  • B-Spec Update 12-19 Nissan Versa Spec Line & Adjust BOP #35074removed -60 lbs
  • B-Spec Clarifying the ECU and Data Acquisition language #35236engine
  • B-Spec Mazda 3i 2010-2013 5-Speed Manual Gear Ratios #34820other
  • B-Spec Error Correction #34955engine
  • B-Spec B-Spec Tire #35034tyres & wheels
Virginia International Raceway Runoffs 20232023-09-232:22.707Riley Salyer · fastest of 25 · top 5 within 1.0s-0.238s (-0.17%)2:23.732Richard Hromin · fastest of 23 · top 5 within 0.4s-0.087s (-0.06%)110.7Chris Daughtery-1.6 mph (-1.4%)2:03.082Daniel Richardson · fastest of 11 · top 5 within 2.2s+0.920s (+0.75%)2:04.120Gregory Eaton · fastest of 9 · top 5 within 3.0s-0.458s (-0.37%)154.6James Jost+3.7 mph (+2.5%)-19.612squal -19.625s86.4%qual 86.2%
25 rule changes (B-Spec: 21, AS: 4)7 weight · 4 suspension & brakes · 3 engine · 3 induction · 3 tyres & wheels · 1 cars added · 4 othershowhide
  • B-Spec Initial car classifications and spec lines #34461weight
  • AS Crate Motor Part Numbers #32944engine
  • AS Request wheel size change #33007tyres & wheels
  • AS Alternative Upper Front Control Arms for Dodge Challenger #33352engine
  • AS Front Brake Caliper Adapters for Dodge Challenger #33353suspension & brakes
  • B-Spec Hyundai Accent Restrictor Plate #34331induction
  • B-Spec Hyundai Accent 2012 Model #34332other
  • B-Spec T5 Tire Options #33641tyres & wheels
  • B-Spec Allow ZZP Sonic Aluminum Radiator 1.68 #33660induction
  • B-Spec Fasteners for Bumper Caps #33797other
  • B-Spec Allow CAN Bus Connection to Data Systems #33806engine
  • B-Spec Request Ford Fiesta weight reduction 25lbs #33890weight -25 lbs
  • B-Spec BoB Adjustments #34208weight -25 lbs
  • B-Spec T5 Mazda 3 Spec Line Addition #33536cars added
  • B-Spec T5 Ride Height Rules. #33552suspension & brakes
  • B-Spec T5 Spring Allowance #33557suspension & brakes
  • B-Spec T5 Wheel Minimum Weight #33558weight
  • B-Spec Threaded Metal Inserts for Plastic Intake Manifolds #34164induction
  • B-Spec T5 Rules Feedback #33595weight
  • B-Spec Early Model Mini #33363other
  • B-Spec Helper Versus Tender springs. #33866suspension & brakes
  • B-Spec Split up Spec lines for Automatic/Manual 2nd Gen Fit #33292other
  • B-Spec Request to Split Spec Lines for Automatic Models #33270weight
  • B-Spec Tire Rule Request #33350tyres & wheels
  • B-Spec Utilize the Data - Make BoP Changes #32179weight -225 lbs
Virginia International Raceway Runoffs 20222022-09-242:22.945Steve Introne · fastest of 30 · top 5 within 1.3s+0.577s (+0.41%)2:23.819Riley Salyer · fastest of 30 · top 5 within 0.8s+1.725s (+1.21%)112.3Matt Giuffre+0.1 mph (+0.1%)2:02.162Kurt Rezzetano · fastest of 13 · top 5 within 2.3s-0.776s (-0.63%)2:04.578Gregory Eaton · fastest of 11 · top 5 within 2.9s+0.678s (+0.55%)150.9James Jost-3.0 mph (-2.0%)-19.241squal -20.783s86.6%qual 85.5%
19 rule changes (B-Spec: 10, AS: 9)6 suspension & brakes · 3 cars added · 2 weight · 1 engine · 1 induction · 3 wording · 3 othershowhide
  • AS Request to add Hoosier W2 #33031other
  • AS correction of Dodge Challenger specification line #33151wording
  • B-Spec Request new Mazda Rear Swaybar #32769suspension & brakes
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • B-Spec Request to Remove Part Numbers from Kia/Hyundai Spec Lines #32378induction
  • B-Spec Request spring attachment #31351suspension & brakes
  • B-Spec Limit Rear Camber to 1.75 Degrees Section 9.1.10.E.35 #31393suspension & brakes
  • B-Spec Letter 31442 Part# Correction #32060wording
  • B-Spec Request to Classify 2020-21 Versa S #30759cars added
  • B-Spec Request to Classify the Toyota IA sedan & Scion IA Sedan for 2022 #31045cars added
  • B-Spec Mazda 2 Undertray #31442suspension & brakes
  • AS Proposed Revisions to SCCA GCR 2021 Appendix M, Part 3 #30295other
  • AS specification line consolidation and correction #31846wording
  • AS correction of SMG specification line #31847suspension & brakes
  • AS Alternate cylinder heads for full prep engine builds - Evaluation #31851engine
  • B-Spec Request to add 2007-2008 Honda Fit #30853cars added
  • AS Request for adjustable Front Upper Control Arms on 4th Gen F-Body #30457other
  • AS Request Pontiac GTO tire size change #30881weight
  • B-Spec Rules Clarification of Body and Camber Plates #30814suspension & brakes
Indianapolis Motor Speedway Runoffs 20212021-09-252:03.121John Phillips · fastest of 60 · top 5 within 1.2s-0.045s (-0.04%)2:03.971Steve Introne · fastest of 60 · top 5 within 0.4s-0.079s (-0.06%)111.2David Oliveira1:50.427Drew Cattell · fastest of 31 · top 5 within 1.9s+5.207s (+4.95%)1:50.606Gregory Eaton · fastest of 28 · top 5 within 1.7s-0.901s (-0.81%)153.8James Jost-13.365squal -12.694s89.2%qual 89.7%
36 rule changes (B-Spec: 22, AS: 14)8 weight · 6 suspension & brakes · 5 cars added · 4 induction · 3 engine · 2 tyres & wheels · 4 wording · 4 othershowhide
  • B-Spec Rules Clarification of Body and Camber Plates #30814suspension & brakes
  • B-Spec B-Spec Mazda2 Header Update #30884weight
  • AS Request CTS-V Spec Line Error Correction #30242weight
  • AS Request to consolidate SN95 Mustang '94-'04 Mustang spec lines #30428cars added
  • AS American Sedan Transmission Rule Change Request #30595weight
  • AS Correction to specifications inadvertently deleted #30691wording
  • AS weight adjustments #30700weight +50 lbs
  • B-Spec Transmission Cooler Requests #30079other
  • B-Spec Request to classify the 07 Honda Fit #30083cars added
  • B-Spec Request Ford Fiesta Eibach Rear Sway Bar Part Number 35143.320 #30340suspension & brakes
  • B-Spec Restrictor rule #30474induction
  • B-Spec Rear wipers on all cars #30585other
  • B-Spec Allow 4 lug hub conversion to R60 and R61 MINI #29863suspension & brakes
  • B-Spec Mazda2 header replacement #29944weight +50 lbs
  • B-Spec Honda Fit Years on Spec Line #30078other
  • B-Spec Hyundai/Kia restrictor size incorrect #30380induction
  • B-Spec Clarify tire compound in rules #30387tyres & wheels
  • AS AS Mustang LP 4.6 3V Classification Transmission Request #29886weight
  • AS Request CF driveshaft on CTS-V for durability improvement #30117engine
  • AS Adjustment to model years of 5th generation RP Camaro #30348engine
  • B-Spec Spec Tire Recommendation #29480tyres & wheels
  • B-Spec Make restrictor thickness unique for B Spec #30349induction
  • B-Spec Request to Classify Hyundai Accent (RB) 2012-2019 #29484cars added
  • B-Spec Countryman production years incorrect #29864other
  • B-Spec Toyota Yaris Model Year Corrections #29896wording
  • B-Spec Correction spec lines for ride height Mini Cooper all models #29952suspension & brakes
  • B-Spec Request to Allow Removal of Stock Brake Dust Shields #29981suspension & brakes
  • B-Spec Request to allow OBX header and restrictor to R55 Clubman 08-10 #30024induction
  • AS Request for 2015 -2017 Ford Mustang Spec Line #29514cars added
  • AS Request Trunk lid / Rear Hatch clarification #29591wording
  • AS Common Weight for CTS-V Tire #29759weight
  • AS Correction to specifications inadvertently deleted #30041cars added
  • AS Request Additional Engine Options for Dodge Challenger Spec Line #29543engine
  • AS Rule simplification spec line communization #29824weight
  • B-Spec Request clarification of B14 shock package for any and all cars #29483suspension & brakes
  • B-Spec Cleanup of spec lines #29495wording
Road America Runoffs 20202020-10-022:52.033David Daughtery · fastest of 25 · top 5 within 1.9s2:52.847Riley Salyer · fastest of 25 · top 5 within 0.8s111.5Robert Iversen2:27.045Gregory Eaton · fastest of 18 · top 5 within 0.6s2:27.668Gregory Eaton · fastest of 15 · top 5 within 1.5s149.2Gregory Eaton-25.179squal -24.988s85.4%qual 85.5%
33 rule changes (B-Spec: 17, AS: 16)6 cars added · 4 induction · 4 weight · 3 engine · 3 suspension & brakes · 2 tyres & wheels · 1 aero · 5 wording · 5 othershowhide
  • B-Spec Allowance Versus Requirement for R56 Mini Cooper #29127induction
  • AS Dodge Challenger AS Spec Line Clarification #28698induction
  • AS Dodge Challenger AS Spec Line Clarification #2 #28699aero
  • AS Support for R-Type Specification Tires #27450tyres & wheels
  • AS Spec Tire Request #27519tyres & wheels
  • AS Restrictor Plate Change for RP 2011+ Mustang with Coyote Engine #27675induction
  • AS 2005-2009 Restricted Prep 4.6 3V #27908engine
  • AS Request for 2005-2009 Restricted Prep 4.6 3V Parts #27909engine
  • AS Request for Full Preparation Classification for 2010-2014 Camaro #28030other
  • AS Cylinder Heads #28696engine
  • AS Request for Max Rotor Diameter Change #28748suspension & brakes
  • AS Request increase rotor diameter #28797other
  • B-Spec Request to change units on wheelbase for consistency with wording #28786wording
  • AS weight adjustments for 2020 season #28785weight -50 lbs
  • B-Spec Transmission cooler for automatic equipped cars #28171weight
  • B-Spec Spring Update for all models #28384suspension & brakes
  • B-Spec Request to Cleanup Sunroof Wording #28401wording
  • B-Spec B-Spec Balance of Performance based on 2018 and 2019 seasons #28394weight -25 lbs
  • B-Spec Request for Model Years Updating #27850other
  • B-Spec Request to classify Min Cooper models #27861cars added
  • B-Spec remove fog lights #27947wording
  • B-Spec add sonic sedan #27948cars added
  • AS Rear Trailing Arms #28007suspension & brakes
  • AS Weight reduction for cars running iron heads #28010weight
  • AS 05-10 Mustang with HR cam classification #28226cars added
  • AS 10-15 Camaro Full Prep classification #28227cars added
  • B-Spec Request for Automatic Transmission Inclusion #27686other
  • B-Spec Request to Add Transmission Coolers to Automatics #27687wording
  • B-Spec Add Yaris Sedan #26797cars added
  • B-Spec Add 2011-2016 Fiesta Sedan #26798cars added
  • B-Spec add 2015-2019 Kia Rio #26799other
  • B-Spec Error and Omissions #27858induction
  • B-Spec Request for Correction of Production Years for Mini Cooper #27226wording
Virginia International Raceway Runoffs 20192019-10-052:22.368Frank Schwartz · fastest of 26 · top 5 within 0.8s2:22.094David Daughtery · fastest of 24 · top 5 within 0.8s112.2John Phillips2:02.938Gregory Eaton · fastest of 17 · top 5 within 0.8s2:03.900James Jost · fastest of 16 · top 5 within 2.1s153.9James Jost-18.194squal -19.430s87.2%qual 86.4%1:55.124Bryce Cornet · fastest of 8 · top 5 within 2.3s2:15.816Bryce Cornet · fastest of 8 · top 5 within 4.9s135.7Bryce Cornet-6.278squal -27.244s95.6%qual 80.9%
12 rule changes (B-Spec: 8, AS: 4)3 cars added · 1 suspension & brakes · 1 weight · 4 wording · 3 othershowhide
  • AS Request to add SMG to 9.1.6.B.1 AS Intent #27140other
  • B-Spec Request for Corrections to 9.1.10 E Item #27 D and E #27224wording
  • B-Spec Remove wording in the B-spec rules #27388wording
  • B-Spec Request to add 2013 Honda Fit model year #27491other
  • AS Request Ride Height Clarification #26598suspension & brakes
  • B-Spec Request to allow OBX Header for 2007-10 Mini Cooper #26977other
  • AS Request to Revert to 2017 Weights #25885weight
  • B-Spec Request to add B-Spec to GCR 9.3.26 fuel cell #26132wording
  • AS SMG Mustang eligibility in American sedan #26224cars added
  • B-Spec Request to classify Canadian Nissan Micra Cup cars #25216cars added
  • B-Spec Request updated Toyota Yaris Spec Lines #25483cars added
  • B-Spec Update wording of exhaust #26022wording
Sonoma Raceway Runoffs 20182018-10-101:59.321Oscar Jackson · fastest of 14 · top 5 within 1.2s1:59.852Jake Pipal · fastest of 12 · top 5 within 1.0s101.0Frank Schwartz1:47.782Andrew McDermid · fastest of 12 · top 5 within 1.9s1:50.345John Heinricy · fastest of 10 · top 5 within 2.3s105.0Kevin Fandozzi-9.507squal -11.539s92.1%qual 90.3%1:37.598Bryce Cornet · fastest of 13 · top 5 within 0.9s1:37.909Bryce Cornet · fastest of 12 · top 5 within 1.3s124.1Melvin David Kemper Jr-21.943squal -21.723s81.7%qual 81.8%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-252:03.166David Daughtery · fastest of 18 · top 5 within 2.5s2:04.050David Daughtery · fastest of 18 · top 5 within 2.3s1:45.220James Jost · fastest of 29 · top 5 within 6.7s1:51.507Bryan Long · fastest of 28 · top 5 within 0.9s-12.543squal -17.946s89.9%qual 85.4%1:41.231Jarret Voorhies · fastest of 16 · top 5 within 1.7s1:41.146Jarret Voorhies · fastest of 16 · top 5 within 1.2s-22.904squal -21.935s81.5%qual 82.2%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:46.865David Daughtery · fastest of 10 · top 5 within 1.0s1:46.930John Heinricy · fastest of 9 · top 5 within 0.6s1:30.651Tom Sloe · fastest of 22 · top 5 within 3.6s1:33.424Edward Hosni · fastest of 20 · top 5 within 1.0s-13.506squal -16.214s87.4%qual 84.8%1:26.043Jacob Loomis · fastest of 8 · top 5 within 3.1s1:27.922Jacob Loomis · fastest of 8 · top 5 within 2.7s-19.008squal -20.822s82.2%qual 80.5%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-212:29.366John Heinricy · fastest of 15 · top 5 within 1.2s2:29.465John Heinricy · fastest of 15 · top 5 within 0.4s2:01.746Tom Sloe · fastest of 22 · top 5 within 2.6s2:02.922Andy McDermid · fastest of 19 · top 5 within 2.2s-26.543squal -27.620s82.2%qual 81.5%1:57.804Joseph Burton-Harris · fastest of 10 · top 5 within 2.3s1:58.029Joseph Burton-Harris · fastest of 10 · top 5 within 1.7s-31.436squal -31.562s79.0%qual 78.9%

By track

TrackEvents Typical % of B-Spec Best Latest 
Road America4100.0%100.0%Runoffs 2020100.0%Runoffs 2026
Virginia International Raceway3100.0%100.0%Runoffs 2019100.0%Runoffs 2023
Indianapolis Motor Speedway2100.0%100.0%Runoffs 2017100.0%Runoffs 2021
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%Runoffs 2018
About this data
Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of B-Spec'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.