BoP Lab / Classes / P2

P2 vs B-Spec vs SM pace at every track

Lap times across years say as much about the weather as the class. % of P2 is each class's best lap as a share of P2'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)

AS +vsB-Spec ×EP +FA +FC +FE2 +FF +FP +FV +FX +GT1 +GT2 +GTX +HP +P +P2×vsSM ×SMX +SRF3 +STL +STU +T1 +T2 +T3 +T4 +Show 51 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: P2 100.0% of P2 Jeff Shafer, Daytona International Speedway Runoffs 2015 race · B-Spec 105.9% of P2 Riley Salyer, Virginia International Raceway Runoffs 2022 race · SM 102.4% of P2 Travis Wiley, Virginia International Raceway Runoffs 2022 race

% of P2Lap times

P2B-SpecSMsolid race · dashed qualifying · slower is lower

P2B-SpecSMsolid race · dashed qualifying · each class's best lap as a share of P2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	P2			B-Spec					SM
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs P2	% of P2	Qual best	Race best	Trap	vs P2	% of P2
	Road America Runoffs 20262026-09-28	2:10.606Greg Gyann · fastest of 11 · top 5 within 5.3s+3.201s (+2.51%)	2:09.441Mike Reupert · fastest of 11 · top 5 within 4.2s+1.119s (+0.87%)	155.0Matt Strand+2.4 mph (+1.6%)	2:51.987Josh 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%)	+42.192squal +41.381s	132.6%qual 131.7%	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%)	+33.284squal +31.567s	125.7%qual 124.2%
18 rule changes (B-Spec: 16, SM: 2)5 suspension & brakes · 5 weight · 1 engine · 1 induction · 1 wording · 5 othershowhide 2026-07-01 SM Rear Toe Link #40271other 2026-06-01 B-Spec ECU Location in Mazda2 #40034engine 2026-06-01 B-Spec Allow Cars With Combined Brake/Clutch Reservoir to Separate. #40122suspension & brakes 2026-05-01 B-Spec Race Memo RM 26-01 B-Spec Mini Cooper Weight Adjustments with OEM #40070weight 2026-04-01 SM Part Number Change Request #39914wording 2026-03-01 B-Spec Add Getrag GS5BG Transmisson Ratios for Mini R50 #39416suspension & brakes 2026-03-01 B-Spec Exhaust Rules Update #39669other 2026-03-01 B-Spec Please reinstate KW suspension for R56 #39727other 2026-03-01 B-Spec Add approved replacement catalysts #39817other 2026-03-01 B-Spec Yaris/Versa catalyst removal #39818other 2026-02-01 B-Spec C-Spec Rear Sway Bars #39652suspension & brakes 2026-01-01 B-Spec Notes section cleanup #39062weight 2026-01-01 B-Spec 2026 BOP Recommendations #39475weight +25 lbs 2026-01-01 B-Spec Expire NLA Mazda 2 Headers #39582weight 2025-11-01 B-Spec Alternate Shift Cable Bushings and Rear Spring Seats #38472suspension & brakes 2025-11-01 B-Spec Fiesta BOP Adjustment #38847weight +55 lbs 2025-11-01 B-Spec Request to Remove Rear Shock From Spec Line Hyundai Accents/Kia #39017suspension & brakes 2025-11-01 B-Spec Update Honda Fit MT (07-08) Runoffs Eligibility #39060induction
	Road America Runoffs 20252025-09-29				2:52.211Josh 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%)			2:43.111Bobby 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%)
28 rule changes (P2: 1, B-Spec: 23, SM: 4)5 induction · 5 suspension & brakes · 4 weight · 1 cars added · 1 engine · 1 tyres & wheels · 2 wording · 9 othershowhide 2025-09-01 B-Spec Remove Asterisk from Rule 9 #38768other 2025-08-01 B-Spec Disabling 2 Pedal Shutdown #38354engine 2025-08-01 B-Spec Update Honda Fit MT (07-08) Intake Allowance #38530induction 2025-06-01 B-Spec Add Sedan spec lines for Hyundai & Kia #37537cars added 2025-06-01 B-Spec Shifter Bushing Questions. #38048suspension & brakes 2025-06-01 B-Spec Add Weapon R Intake to Honda Fit MT (09-14) Spec Line #38306induction 2025-06-01 B-Spec Update Rule 46 #38307suspension & brakes 2025-06-01 SM SMX Data Submission - Penalties #38248other 2025-06-01 SM SMX Penaly Clarification updated language #38337wording 2025-05-01 B-Spec Correct Hyundai/Kia Model Years #37943wording 2025-05-01 B-Spec 07-08 Honda Fit MT Requests #37974weight +50 lbs 2025-05-01 B-Spec Add B14 Kit Part # to Honda Fit (07-08) Spec line #38010other 2025-05-01 SM Clarify Tire Marking Regs #38005tyres & wheels 2025-04-01 B-Spec 2025 BOP Recommendations #37520weight 2025-04-01 B-Spec Hyundai/Toyota Factory Rear Disc Models #37534weight 2025-04-01 B-Spec Request to Update the Spec line for Hyundai Accent and Kia Rio #37880suspension & brakes 2025-03-01 B-Spec Toyota Yaris Hatchback (12-18) rear disc brakes #37530suspension & brakes 2025-03-01 B-Spec Yaris Speed Sensor #37536other 2025-03-01 B-Spec Set Expiration Date For Fiat 500 #37689other 2025-02-01 B-Spec Remove Redundant Language from Notes Sections #37337induction 2025-02-01 B-Spec Expire designated spec lines #37517other 2025-02-01 B-Spec Set expiration date for Nissan Micra Cup Cars (Canadian) #37519other 2025-01-01 B-Spec Remove wheelbase from spec lines and replace with Restrictor #36074induction 2025-01-01 B-Spec Bilstein Rear Shock Request for Hyundai Accent/Kia Rio #36965suspension & brakes 2024-12-01 P2 2000 cc Pinto Engine Car Weight #37187weight 2024-12-01 SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other 2024-11-01 B-Spec Scion IA/Toyota Yaris/Mazda 2 DY chassis suspension #35780other 2024-11-01 B-Spec Clean up 07-08 Honda Fit AT Notes Section #36542induction
	Road America Runoffs 20242024-10-01	2:07.405Bart Wolf · fastest of 14 · top 5 within 3.0s-1.109s (-0.86%)	2:08.322Bart Wolf · fastest of 13 · top 5 within 0.6s-1.471s (-1.13%)	152.5Lucian Pancea-0.6 mph (-0.4%)	2:52.027Daniel 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%)	+43.567squal +44.622s	134.0%qual 135.0%	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%)	+33.164squal +33.701s	125.8%qual 126.5%
39 rule changes (P2: 5, B-Spec: 30, SM: 4)8 engine · 6 suspension & brakes · 6 tyres & wheels · 4 weight · 3 induction · 2 removed · 1 cars added · 2 wording · 7 othershowhide 2024-09-01 SM SMX Camera Rule Correction #36496wording 2024-09-01 SM AIM ECU Protocol #36556engine 2024-09-01 SM OE versus OEM Definitons #36608other 2024-09-01 SM Shifter Bushing #36611suspension & brakes 2024-08-01 B-Spec Update Tire Rules #35984tyres & wheels 2024-08-01 B-Spec BOP help for the automatic B-Specs #36161weight -50 lbs 2024-08-01 B-Spec Require hood pins #36233other 2024-08-01 B-Spec Sonic Caliper Pistons #36238suspension & brakes 2024-07-01 B-Spec Clean up (15-19) Honda Fit MT & CVT Notes Sections #36068induction 2024-07-01 B-Spec Set expiration date for Nissan Versa (09-11) #36069other 2024-07-01 B-Spec Delete Redundant Rule 25 #36075removed 2024-07-01 B-Spec Correct error for rear brakes of Hyundai/Kia #36174suspension & brakes 2024-06-01 B-Spec Add B14 Kit Part # to Sonic Spec line In #35969induction 2024-06-01 B-Spec Eliminate redundant sway bar end link part #s from notes In #35970suspension & brakes 2024-06-01 B-Spec Update Fiat 500 Spec line In #35990other 2024-06-01 B-Spec Update (15-19) Honda Fit #36067weight +25 lbs 2024-05-01 B-Spec Delete trim levels/update language for spec lines #35746other 2024-05-01 B-Spec Wheel Rules #36066tyres & wheels 2024-05-01 P2 CN Spec ECU #35835engine 2024-05-01 P2 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels 2024-04-01 B-Spec Change restrictor from 30mm to 31mm (2015+ Honda Fit) and add 50# #34857induction 2024-04-01 B-Spec Wheel Offset and Spacer Revision #35466tyres & wheels 2024-04-01 B-Spec Set Expiration Date for Unused Spec Lines #35742engine 2024-03-01 B-Spec BOP Adjustment for Yaris iA, 2020+ Versa, and 07-08 Honda Fit #35382weight -125 lbs 2024-03-01 B-Spec 07-08 Honda Fit Rear Sway Bar part # #35473suspension & brakes 2024-02-01 B-Spec Eliminate Redundant Trans Cooler Rule #35353wording 2024-02-01 B-Spec Fix Sonic Hatchback MT Spec Line #35371other 2024-02-01 B-Spec Split Spec Line of Automatic and Manual 2nd Gen (09-14) Fit #35251cars added 2024-02-01 B-Spec Equalize Mazda 2 Headers and clean up spec line #35259weight 2024-02-01 B-Spec Rear Sway Bar Request for Nissan Versa and Versa Note 2013- #35323suspension & brakes 2024-01-01 B-Spec B-Spec Hankook Tire for Regionals #35055tyres & wheels 2024-01-01 B-Spec Update 12-19 Nissan Versa Spec Line & Adjust BOP #35074removed -60 lbs 2024-01-01 B-Spec Clarifying the ECU and Data Acquisition language #35236engine 2024-01-01 P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225engine 2024-01-01 P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engine 2023-12-01 B-Spec Mazda 3i 2010-2013 5-Speed Manual Gear Ratios #34820other 2023-12-01 B-Spec Error Correction #34955engine 2023-12-01 P2 Correct Table 1 for Engine Date Range Specifications #35182engine 2023-11-01 B-Spec B-Spec Tire #35034tyres & wheels
	Virginia International Raceway Runoffs 20232023-09-23	1:48.590Greg Gyann · fastest of 12 · top 5 within 1.7s+1.024s (+0.95%)	1:48.829Lucian Pancea · fastest of 11 · top 5 within 0.9s-27.005s (-19.88%)	150.9Lucian Pancea-0.2 mph (-0.2%)	2:22.707Riley 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%)	+34.903squal +34.117s	132.1%qual 131.4%	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%)	+27.400squal +26.396s	125.2%qual 124.3%
30 rule changes (P2: 8, B-Spec: 21, SM: 1)11 weight · 3 engine · 3 induction · 3 suspension & brakes · 3 tyres & wheels · 2 cars added · 1 wording · 4 othershowhide 2023-09-01 B-Spec Initial car classifications and spec lines #34461weight 2023-07-01 B-Spec Hyundai Accent Restrictor Plate #34331induction 2023-07-01 B-Spec Hyundai Accent 2012 Model #34332other 2023-06-01 B-Spec T5 Tire Options #33641tyres & wheels 2023-06-01 B-Spec Allow ZZP Sonic Aluminum Radiator 1.68 #33660induction 2023-06-01 B-Spec Fasteners for Bumper Caps #33797other 2023-06-01 B-Spec Allow CAN Bus Connection to Data Systems #33806engine 2023-06-01 B-Spec Request Ford Fiesta weight reduction 25lbs #33890weight -25 lbs 2023-06-01 B-Spec BoB Adjustments #34208weight -25 lbs 2023-06-01 B-Spec T5 Mazda 3 Spec Line Addition #33536cars added 2023-06-01 B-Spec T5 Ride Height Rules. #33552suspension & brakes 2023-06-01 B-Spec T5 Spring Allowance #33557suspension & brakes 2023-06-01 B-Spec T5 Wheel Minimum Weight #33558weight 2023-06-01 B-Spec Threaded Metal Inserts for Plastic Intake Manifolds #34164induction 2023-05-01 B-Spec T5 Rules Feedback #33595weight 2023-05-01 P2 Clarify minimum side body height requirement #34143tyres & wheels 2023-05-01 P2 Clarify closed cockpit single seat car allowance #34144wording 2023-04-01 P2 Remove redundant effective date language and update engine table #34012engine 2023-04-01 P2 E&O - Correct dimensional equivalents #34038weight 2023-03-01 B-Spec Early Model Mini #33363other 2023-03-01 B-Spec Helper Versus Tender springs. #33866suspension & brakes 2023-02-01 B-Spec Split up Spec lines for Automatic/Manual 2nd Gen Fit #33292other 2023-01-01 B-Spec Request to Split Spec Lines for Automatic Models #33270weight 2023-01-01 B-Spec Tire Rule Request #33350tyres & wheels 2023-01-01 P2 Request to Classify Sebeco NP01 #33378cars added 2023-01-01 P2 Radical spec line clarifications #33485weight 2023-01-01 P2 E&O original class intent #33519weight 2023-01-01 P2 Update Engine Table Spec Line B.1 #33608engine 2023-01-01 SM BOP for NB1 and NB2 #32309weight 2022-10-01 B-Spec Utilize the Data - Make BoP Changes #32179weight -225 lbs
	Virginia International Raceway Runoffs 20222022-09-24	1:47.566Tim Day Jr · fastest of 12 · top 5 within 3.0s-1.545s (-1.42%)	2:15.834Greg Gyann · fastest of 12 · top 5 within 10.1s+25.576s (+23.20%)	151.1Robert Iversen+1.8 mph (+1.2%)	2:22.945Steve 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%)	+7.985squal +35.379s	105.9%qual 132.9%	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%)	+3.273squal +27.098s	102.4%qual 125.2%
21 rule changes (P2: 10, B-Spec: 10, SM: 1)6 suspension & brakes · 3 cars added · 3 tyres & wheels · 2 engine · 1 aero · 1 induction · 1 weight · 2 wording · 2 othershowhide 2022-08-01 B-Spec Request new Mazda Rear Swaybar #32769suspension & brakes 2022-05-01 B-Spec Request to Remove Part Numbers from Kia/Hyundai Spec Lines #32378induction 2022-05-01 P2 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels 2022-05-01 P2 Clean up P2 wording #32525wording 2022-04-01 P2 After Market to Aftermarket #32373other 2022-04-01 SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes 2022-03-01 B-Spec Request spring attachment #31351suspension & brakes 2022-03-01 B-Spec Limit Rear Camber to 1.75 Degrees Section 9.1.10.E.35 #31393suspension & brakes 2022-03-01 B-Spec Letter 31442 Part# Correction #32060wording 2022-03-01 P2 Add spec line for Beasley B2 #32147weight 2022-03-01 P2 E&O Table 1 spec line wing terminology #32148aero 2022-03-01 P2 E&O class name #32196other 2022-02-01 B-Spec Request to Classify 2020-21 Versa S #30759cars added 2022-02-01 B-Spec Request to Classify the Toyota IA sedan & Scion IA Sedan for 2022 #31045cars added 2022-02-01 B-Spec Mazda 2 Undertray #31442suspension & brakes 2022-02-01 P2 E&O Engine section #31969engine 2022-01-01 B-Spec Request to add 2007-2008 Honda Fit #30853cars added 2022-01-01 P2 E&O letter #31539 – Control Area definition #31783tyres & wheels 2021-12-01 P2 BoP adjustment effective 1-1-22 #31538engine 2021-12-01 P2 E&O clarification of "Control Area" definition #31539tyres & wheels 2021-10-01 B-Spec Rules Clarification of Body and Camber Plates #30814suspension & brakes
	Indianapolis Motor Speedway Runoffs 20212021-09-25	1:33.235Tim Day Jr · fastest of 16 · top 5 within 3.3s+1.409s (+1.53%)	1:35.322Tim Day Jr · fastest of 10 · top 5 within 4.8s+2.841s (+3.07%)	150.3Robert Iversen	2:03.121John 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 Oliveira	+28.649squal +29.886s	130.1%qual 132.1%	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	+23.515squal +24.460s	124.7%qual 126.2%
31 rule changes (P2: 8, B-Spec: 22, SM: 1)6 suspension & brakes · 5 induction · 3 engine · 3 tyres & wheels · 2 cars added · 2 weight · 2 wording · 8 othershowhide 2021-09-01 B-Spec Rules Clarification of Body and Camber Plates #30814suspension & brakes 2021-09-01 P2 P2 CN Engine Rebuild Clarification #31000engine 2021-08-01 P2 F5 P2 Conversion #30856other 2021-08-01 P2 Clarify minimum body width requirement #30859tyres & wheels 2021-07-01 B-Spec B-Spec Mazda2 Header Update #30884weight 2021-06-01 B-Spec Transmission Cooler Requests #30079other 2021-06-01 B-Spec Request to classify the 07 Honda Fit #30083cars added 2021-06-01 B-Spec Request Ford Fiesta Eibach Rear Sway Bar Part Number 35143.320 #30340suspension & brakes 2021-06-01 B-Spec Restrictor rule #30474induction 2021-06-01 B-Spec Rear wipers on all cars #30585other 2021-05-01 P2 E&O tonneau cover provision in cockpit opening section #30459other 2021-05-01 P2 Remove effective dates in Table 1 #30468other 2021-05-01 P2 E&O Maximum Valves Per Cylinder #30560engine 2021-04-01 B-Spec Allow 4 lug hub conversion to R60 and R61 MINI #29863suspension & brakes 2021-04-01 B-Spec Mazda2 header replacement #29944weight +50 lbs 2021-04-01 B-Spec Honda Fit Years on Spec Line #30078other 2021-04-01 B-Spec Hyundai/Kia restrictor size incorrect #30380induction 2021-04-01 B-Spec Clarify tire compound in rules #30387tyres & wheels 2021-04-01 SM Updates - Obsolete Parts & BOP Parts #30438other 2021-03-01 B-Spec Spec Tire Recommendation #29480tyres & wheels 2021-03-01 B-Spec Make restrictor thickness unique for B Spec #30349induction 2021-03-01 P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine 2021-02-01 B-Spec Request to Classify Hyundai Accent (RB) 2012-2019 #29484cars added 2021-02-01 B-Spec Countryman production years incorrect #29864other 2021-02-01 B-Spec Toyota Yaris Model Year Corrections #29896wording 2021-02-01 B-Spec Correction spec lines for ride height Mini Cooper all models #29952suspension & brakes 2021-02-01 B-Spec Request to Allow Removal of Stock Brake Dust Shields #29981suspension & brakes 2021-02-01 B-Spec Request to allow OBX header and restrictor to R55 Clubman 08-10 #30024induction 2020-12-01 B-Spec Request clarification of B14 shock package for any and all cars #29483suspension & brakes 2020-12-01 B-Spec Cleanup of spec lines #29495wording 2020-12-01 P2 Balance of Performance adjustments effective 01-01-2021 #29822induction
	Road America Runoffs 20202020-10-02	2:08.514Robert Iversen · fastest of 12 · top 5 within 3.0s	2:09.793Robert Iversen · fastest of 12 · top 5 within 3.9s	153.1Robert Iversen	2:52.033David Daughtery · fastest of 25 · top 5 within 1.9s	2:52.847Riley Salyer · fastest of 25 · top 5 within 0.8s	111.5Robert Iversen	+43.054squal +43.519s	133.2%qual 133.9%	2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s	2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s	121.3Kyle Greenhill	+33.955squal +33.695s	126.2%qual 126.2%
25 rule changes (P2: 6, B-Spec: 17, SM: 2)5 cars added · 4 induction · 3 engine · 2 suspension & brakes · 2 weight · 1 aero · 5 wording · 3 othershowhide 2020-10-01 SM Radiator E&O Clarifications #29294engine 2020-09-01 B-Spec Allowance Versus Requirement for R56 Mini Cooper #29127induction 2020-09-01 P2 E&O clarification of P2 rear wing requirements #29205aero 2020-08-01 SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes 2020-06-01 B-Spec Request to change units on wheelbase for consistency with wording #28786wording 2020-06-01 P2 Classify Elan NP01 in P2 Table 1 #28812cars added 2020-05-01 B-Spec Transmission cooler for automatic equipped cars #28171weight 2020-05-01 B-Spec Spring Update for all models #28384suspension & brakes 2020-05-01 B-Spec Request to Cleanup Sunroof Wording #28401wording 2020-05-01 B-Spec B-Spec Balance of Performance based on 2018 and 2019 seasons #28394weight -25 lbs 2020-05-01 P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction 2020-04-01 P2 Add ESR inlet restrictor #27869induction 2020-03-01 B-Spec Request for Model Years Updating #27850other 2020-03-01 B-Spec Request to classify Min Cooper models #27861cars added 2020-03-01 B-Spec remove fog lights #27947wording 2020-03-01 B-Spec add sonic sedan #27948cars added 2020-03-01 P2 Request for Fly by Wire Rule Wording Change #28247engine 2020-02-01 B-Spec Request for Automatic Transmission Inclusion #27686other 2020-02-01 B-Spec Request to Add Transmission Coolers to Automatics #27687wording 2020-01-01 B-Spec Add Yaris Sedan #26797cars added 2020-01-01 B-Spec Add 2011-2016 Fiesta Sedan #26798cars added 2020-01-01 B-Spec add 2015-2019 Kia Rio #26799other 2020-01-01 B-Spec Error and Omissions #27858induction 2020-01-01 P2 Request for addition of BMW Engine in P2 Engine Table #27821engine 2019-12-01 B-Spec Request for Correction of Production Years for Mini Cooper #27226wording
	Virginia International Raceway Runoffs 20192019-10-05	1:49.111Robert Iversen · fastest of 14 · top 5 within 0.8s	1:50.258Greg Gyann · fastest of 13 · top 5 within 0.4s	149.4Robert Iversen	2:22.368Frank Schwartz · fastest of 26 · top 5 within 0.8s	2:22.094David Daughtery · fastest of 24 · top 5 within 0.8s	112.2John Phillips	+31.836squal +33.257s	128.9%qual 130.5%	2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s	2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s	119.8Jim Drago	+26.201squal +25.441s	123.8%qual 123.3%
21 rule changes (P2: 9, B-Spec: 8, SM: 4)5 engine · 3 weight · 2 cars added · 2 induction · 2 tyres & wheels · 5 wording · 2 othershowhide 2019-10-01 B-Spec Request for Corrections to 9.1.10 E Item #27 D and E #27224wording 2019-10-01 B-Spec Remove wording in the B-spec rules #27388wording 2019-10-01 B-Spec Request to add 2013 Honda Fit model year #27491other 2019-10-01 P2 Update Engine Table Line E notes #27414engine 2019-08-31 P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine 2019-07-01 B-Spec Request to allow OBX Header for 2007-10 Mini Cooper #26977other 2019-07-01 P2 E&O Transmissions #27006tyres & wheels 2019-06-01 P2 Request to restrict all cars #26246weight 2019-03-01 B-Spec Request to add B-Spec to GCR 9.3.26 fuel cell #26132wording 2019-03-01 P2 Change Engine Table Lines B.1 & B.5 #25777engine 2019-03-01 P2 Change Line A.1 restrictor size #26429induction 2019-03-01 SM Request to allow aftermarket fuel filters. #26370wording 2019-02-01 SM Request 99-00 replacement Wire harnesses #25602engine 2019-02-01 SM Organize and Clarify 9.1.7.C.1.o. #25913weight 2019-02-01 SM Strike Tire Tread Language #26123tyres & wheels 2019-01-01 B-Spec Request to classify Canadian Nissan Micra Cup cars #25216cars added 2019-01-01 B-Spec Request updated Toyota Yaris Spec Lines #25483cars added 2019-01-01 B-Spec Update wording of exhaust #26022wording 2019-01-01 P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595engine 2019-01-01 P2 Change CN inlet restrictor implementation date #25816induction 2019-01-01 P2 Clarify Honda K20A-FD2 parts requirement #25950weight
	Sonoma Raceway Runoffs 20182018-10-10	1:28.784Tim Day Jr · fastest of 17 · top 5 within 5.0s	1:32.071Chuck Bona · fastest of 18 · top 5 within 0.9s	144.4Tim Day Jr	1:59.321Oscar Jackson · fastest of 14 · top 5 within 1.2s	1:59.852Jake Pipal · fastest of 12 · top 5 within 1.0s	101.0Frank Schwartz	+27.781squal +30.537s	130.2%qual 134.4%	1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s	1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s	102.2Danny Steyn	+23.207squal +25.571s	125.2%qual 128.8%
No rule changes on record between these events
	Indianapolis Motor Speedway Runoffs 20172017-09-25	1:31.826Jeff Shafer · fastest of 26 · top 5 within 4.9s	1:32.481Jeff Shafer · fastest of 24 · top 5 within 3.8s		2:03.166David Daughtery · fastest of 18 · top 5 within 2.5s	2:04.050David Daughtery · fastest of 18 · top 5 within 2.3s		+31.569squal +31.340s	134.1%qual 134.1%	1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s	1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s		+26.619squal +26.480s	128.8%qual 128.8%
No rule changes on record between these events
	Mid-Ohio Sports Car Course Runoffs 20162016-09-19	1:20.188Jeff Shafer · fastest of 18 · top 5 within 4.0s	1:20.904Jeff Shafer · fastest of 16 · top 5 within 2.2s		1:46.865David Daughtery · fastest of 10 · top 5 within 1.0s	1:46.930John Heinricy · fastest of 9 · top 5 within 0.6s		+26.026squal +26.677s	132.2%qual 133.3%	1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s	1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s		+19.860squal +20.326s	124.5%qual 125.3%
No rule changes on record between these events
	Daytona International Speedway Runoffs 20152015-09-21	1:51.825Chris Farrell · fastest of 17 · top 5 within 3.6s	1:52.355Jeff Shafer · fastest of 17 · top 5 within 2.8s		2:29.366John Heinricy · fastest of 15 · top 5 within 1.2s	2:29.465John Heinricy · fastest of 15 · top 5 within 0.4s		+37.110squal +37.541s	133.0%qual 133.6%	2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s	2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s		+31.712squal +26.836s	128.2%qual 124.0%

By track

Track	Events	Typical % of P2	Best	Latest
Road America	4	100.0%3 of 4 with P2	100.0%Runoffs 2020	100.0%Runoffs 2026
Virginia International Raceway	3	100.0%	100.0%Runoffs 2019	100.0%Runoffs 2023
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 P2'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.