Official results win over the timing feed: the live timing recorded a 1:56.549 for Don Knowles in Runoffs 2017 T4 Race, but the official results credit 1:58.002 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too.
One lap is left out as timing errors (far too short to be a lap of this track). The rest of those sessions, sectors included, is used.
One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it.
Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors
S1 SF → IM3 1.37 mi
S2 IM3 → IM4 0.48 mi
S3 IM4 → SF 0.75 mi
SPd IM1 → IM2 0.02 mi
Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
By car
Car
Class
Drivers
Lap
Qual
Race
Trap
S1
S2
S3
Mazda 3
T4
2
1:53.117Derrick Ambrose
1:56.969Derrick Ambrose
2:00.096Derrick Ambrose
145.8Derrick Ambrose
57.887Derrick Ambrose
23.058Derrick Ambrose
31.522Derrick Ambrose
Mazda 3
T4
1
1:53.117Derrick Ambrose
1:56.969Derrick Ambrose
2:00.096Derrick Ambrose
145.8Derrick Ambrose
57.887Derrick Ambrose
23.058Derrick Ambrose
31.522Derrick Ambrose
Mazda 3 S
T4
1
2:06.728Steven Taake
2:09.003Steven Taake
2:06.728Steven Taake
115.8Steven Taake
1:04.672Steven Taake
25.063Steven Taake
36.730Steven Taake
Scion FR-S
T4
10
1:53.375Izzy Sanchez
1:55.496Izzy Sanchez
1:56.961Darren Seltzer
142.0Izzy Sanchez
57.757Izzy Sanchez
22.785Izzy Sanchez
31.556Izzy Sanchez
Scion FR-S
T4
5
1:53.375Izzy Sanchez
1:55.496Izzy Sanchez
1:57.342Colin Koehler
142.0Izzy Sanchez
57.757Izzy Sanchez
22.785Izzy Sanchez
31.556Izzy Sanchez
Scion FR-S (2015)
T4
1
1:56.810Chi Ho
1:56.810Chi Ho
2:24.182Chi Ho
Scion FR-S (2016)
T4
2
1:56.961Darren Seltzer
1:57.055Darren Seltzer
1:56.961Darren Seltzer
Scion FR-S (2014)
T4
1
1:57.154Kellie Czarny
1:57.154Kellie Czarny
1:57.161Kellie Czarny
Scion FR-S (2013)
T4
1
1:58.323Scotty B White
1:58.323Scotty B White
1:58.982Scotty B White
Mazda RX-8
T4
11
1:54.397Stephen Blethen
1:54.397Stephen Blethen
1:56.648Raymond Blethen
127.3Alexander Schefer
58.972Stephen Blethen
22.243Raymond Blethen
32.789Stephen Blethen
Mazda RX-8
T4
8
1:54.397Stephen Blethen
1:54.397Stephen Blethen
1:56.648Raymond Blethen
127.3Alexander Schefer
58.972Stephen Blethen
22.243Raymond Blethen
32.789Stephen Blethen
Mazda RX-8 (2005)
T4
1
1:57.109Don Knowles
1:57.109Don Knowles
1:58.002Don Knowles
Mazda RX-8 (2004)
T4
1
1:58.523Ross Murray
1:58.994Ross Murray
1:58.523Ross Murray
Mazda RX8
T4
1
1:58.733Lance Stewart
2:00.789Lance Stewart
1:58.733Lance Stewart
Mazda MX-5
T4
31
1:54.893Thomas Fowler
1:54.893Thomas Fowler
1:56.095Michael Borden
129.2Steven Christopher
59.360Michael Borden
22.537Thomas Fowler
32.833Thomas Fowler
Mazda MX-5
T4
20
1:54.893Thomas Fowler
1:54.893Thomas Fowler
1:56.095Michael Borden
129.2Steven Christopher
59.360Michael Borden
22.537Thomas Fowler
32.833Thomas Fowler
Mazda MX-5 (2010)
T4
2
1:57.899Thomas Bernacki
1:57.899Thomas Bernacki
1:58.217Jon Yanca
Mazda MX-5 (2009)
T4
2
1:58.180Ryan Kowalewski
1:58.180Ryan Kowalewski
1:58.417Ryan Kowalewski
Mazda MX-5 (2006)
T4
4
1:59.551Ali Naimi
1:59.551Ali Naimi
2:00.354Ali Naimi
Mazda MX-5 (2014)
T4
1
1:59.567Ron Munnerlyn
1:59.567Ron Munnerlyn
2:00.127Ron Munnerlyn
Mazda MX-5 (2007)
T4
1
2:01.758Steve Strickland
2:01.758Steve Strickland
2:02.499Steve Strickland
Mazda MX-5 (2002)
T4
1
2:07.412Keith Jones
2:08.522Keith Jones
2:07.412Keith Jones
Toyota 86
T4
3
1:55.267John Heinricy
1:55.267John Heinricy
1:55.929John Heinricy
125.4Felix Borodaty
59.363John Heinricy
22.540John Heinricy
33.193John Heinricy
Toyota 86
T4
2
1:55.267John Heinricy
1:55.267John Heinricy
1:55.929John Heinricy
125.4Felix Borodaty
59.363John Heinricy
22.540John Heinricy
33.193John Heinricy
Toyota 86 (2017)
T4
1
1:56.566Oscar Jackson
1:56.566Oscar Jackson
1:56.923Oscar Jackson
BMW 320i
T4
1
1:55.949Chi Ho
1:55.949Chi Ho
3:29.361Chi Ho
124.6Chi Ho
1:00.091Chi Ho
22.968Chi Ho
32.849Chi Ho
Mazda Miata
T4
2
1:55.957David Hooker
2:06.386David Hooker
2:05.472David Hooker
139.0David Hooker
59.234David Hooker
23.468David Hooker
32.746David Hooker
Pontiac Solstice
T4
3
1:56.152Garrett Mays
1:56.152Garrett Mays
1:58.307Garrett Mays
119.8Garrett Mays
59.967Garrett Mays
22.754Garrett Mays
33.422Garrett Mays
Pontiac Solstice
T4
1
1:56.152Garrett Mays
1:56.152Garrett Mays
1:58.307Garrett Mays
119.8Garrett Mays
59.967Garrett Mays
22.754Garrett Mays
33.422Garrett Mays
Pontiac Solstice (2006)
T4
1
2:03.057Matt Downing
2:03.616Matt Downing
2:03.057Matt Downing
Pontiac Solstice (2007)
T4
1
2:04.674Michael Dalton
2:04.674Michael Dalton
2:05.997Michael Dalton
Subaru BRZ
T4
4
1:56.898Jared Lendrum
1:56.898Jared Lendrum
1:59.303Jared Lendrum
124.8Jared Lendrum
1:00.193Jared Lendrum
23.015Jared Lendrum
33.347Jared Lendrum
Subaru BRZ
T4
3
1:56.898Jared Lendrum
1:56.898Jared Lendrum
1:59.303Jared Lendrum
124.8Jared Lendrum
1:00.193Jared Lendrum
23.015Jared Lendrum
33.347Jared Lendrum
Subaru BRZ (2013)
T4
1
2:05.204Whitfield Gregg
2:06.871Whitfield Gregg
2:05.204Whitfield Gregg
BMW Z4
T4
1
1:57.116Ralph Porter
1:57.116Ralph Porter
1:58.303Ralph Porter
125.4Ralph Porter
1:00.193Ralph Porter
23.173Ralph Porter
33.019Ralph Porter
Ford Mustang V6
T4
3
1:58.599Paolo Salvatore
1:58.599Paolo Salvatore
2:01.408Paolo Salvatore
124.3Paolo Salvatore
1:00.811Paolo Salvatore
23.606Paolo Salvatore
33.967Paolo Salvatore
Acura RSX Type-S
T4
2
1:58.830Jeff Jensen
1:58.830Jeff Jensen
1:59.600Jeff Jensen
Honda Civic SI
T4
1
1:59.908James Coughlin
1:59.908James Coughlin
2:00.250James Coughlin
Chevrolet Camaro
T4
3
2:03.911Curt Faigle
2:04.171Liam Vail
2:03.911Curt Faigle
117.1Liam Vail
1:03.872Liam Vail
24.701Liam Vail
34.861Liam Vail
Chevrolet Camaro (2002)
T4
2
2:03.911Curt Faigle
2:04.692Curt Faigle
2:03.911Curt Faigle
Chevrolet Camaro
T4
1
2:04.171Liam Vail
2:04.171Liam Vail
2:04.927Liam Vail
117.1Liam Vail
1:03.872Liam Vail
24.701Liam Vail
34.861Liam Vail
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
Rule changes between these events
Runoffs 2017 → Runoffs 2021 2017-09-25 to 2021-09-25
T4 Errors, Omissions, and Updates (Various)
#22414 from Darren Seltzer · Rule change · TB 19-01 (2019-01 Fastrack)
neutralT4 Ford Fiesta ST years corrected to 14-; T4 Fiat 124/Abarth Edition years added 16-18; battery rule clarified.
In T4, remove the following from the header in the spec line table: Wheel Size(in.)/ Mat’l. In T4, Toyota Celica GT (00-05), add to spec line as follows: Wheelbase: 2600 Wheel size: 15 x 7 In T4, Kia Forte Koup and Sedan LX/EX (2010-), add years as follows: (2010-2013) In T4, Kia Forte Koup and Sedan SX (2010-), add years as follows:
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(2010- 2013) In T4, Ford Fiesta ST (12-15), make changes to years as follows: (12 14-15-) In T4, Fiat 124 / Abarth Edition, add years as follows: (16-18) In GCR section 9.1.9.2.D.1.g.3, make changes as follows: Batteries may be replaced with those of an alternate manu¬(<--strike extra character)facturer, provided they are of similar amp-hour capacity, size and within 10% of OEM weight.
T4 Request for Adjustments to fiat 124 specline
#25371 from Christopher Childs · Rule change · TB 19-01 (2019-01 Fastrack)
fasterT4 Fiat 124 Abarth Edition restrictor changes from 29mm flat plate to 30mm TIR.
In T4, Fiat 124 / Abarth Edition, make changes to the notes as follows: “The following items must remain stock: shock/ struts (including mounts), original wheels, and transmission differential - unless specified below. Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. 29mm 30mm flat plate restrictor required TIR. DG motorsports part #50-93-7100 hardtop allowed.”
T4 Add Clarification to Spec Car Classifications Vehicle Spec
neutralT1-T3 spec cars receive clarifications on permitted modifications, documentation requirements, and rule conformance; no performance changes.
Lines In T1, Porsche Cayman GTS (2011), add to notes as follows: “Must conform to 7/15/2015 version 15 VTS. TC aftermarket ABS controller allowed. PDK Permitted +100lbs. No other touring modifications or allowances permitted beyond the noted VTS and these spec line allowances.” In T1, Audi TTRS (GTS 2011 Spec), add to notes as follows: “Must conform to December 14th, 2011 revision 3 GTS rules. No other touring modifications or allowances permitted beyond the noted GTS rules allowances.”
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In T1, Ferrari 430 Challenge, add to notes as follows: “As homologated. DOT tires per 9.1.4.P.1; weight as specified; side windows must be removed; OEM carbon brakes or the Ferrari steel brakes from the 360 Challenge car (F 355 x 32 vented disc, R 330 x 18 vented disc) are permitted; If 18 inch “360” brakes are used, 18 inch wheels are permitted; 19 inch Ferrari Challenge wheels as delivered from factory permitted. Non-OEM rear wing / splitter reduce restrictor by 5 mm. No other touring modifications or allowances permitted.” In T1, Porsche 996 GT3 Cup (02-05), add to notes as follows: “996 required gear ratios: Crown wheel and pinion 8/32; 1st gear 13/41, 2nd gear 20/40, 3rd gear 25/39, 4th gear 29/36 or 26/34, 5th gear 32/33 or 32/35, 6th gear 35/30 or 34/31. No other touring modifications or allowances permitted except as noted in this spec line.” In T2, BMW M235iR (-2016), add to notes as follows: “As homologated from BMW Motorsports No other changes or touring rule allowances permitted. Must conform to World-Challenge VTS 2/25/2016 rev.2.” In T2, Nissan 350Z Track/ Touring/ Standard/ Nismo Spec Z (03-08), add to notes as follows: “SPL rear toe links part# SPL RTA Z33 permitted. Stillen part #400338 permitted. Must conform to all SpecZ 2018 Edition rules. No other touring allowances beyond 2018 SpecZ edition rules or allowances listed here.” In T2, Porsche Spec Cayman, add to notes as follows: “Must conform to all SPC rules in the PCA rulebook. Each competitor shall have available definitive current documentation of the PCA rules. Spec Cayman tires permitted per Spec Cayman rules. Must use DOT tires. No other touring allowances permitted.” In T2, Spec Mustang, add to notes as follows: “Must meet all requirements of Spec Mustang rules located in the Appendices. Cars must Comply with all SCCA T2 graphics and marking rules, including the posting of minimum weight. It is the responsibility of the driver to declare if its running under T2 rules or SMG rules - no mixing between rules.In T3, BMW SpecE46, add to notes as follows: “Must conform to all SpecE46 rules in Appendix N. SpecE46 spec tire permitted per SpecE46 appendix rules or any DOT permitted. No other touring allowances permitted.” In T3, Nissan 350Z Track/ Touring/ Standard/ Nismo (03-08) Spec Z, add to notes as follows: “DE Engine: 57mm flat plate restrictor required. Zspeed and Z1 alternative clutch slave permitted. Must conform to all SpecZ 2018 Edition rules. No other touring allowances beyond 2018 SpecZ edition rules or allowances listed here.” In T3, Porsche Spec Boxster, add to notes as follows: “Must conform to all SPB rules in the PCA rulebook. Each competitor shall have available definitive current documentation of the PCA rules. Tires must meet 2016 SPB rules or any 225 DOT tire permitted. No other touring allowances permitted.”
neutralT2-T4 subframe bushings may now be replaced with non-spherical bushings of any material.
In GCR section 9.1.9.2.i.7, make changes as follows: “Fluid filled motor mounts, fluid filled transmission mounts, and fluid filled differential mounts and sub-frame bushings may be replaced with non spherical non-metallic mounts. Sub-frame bushings may be replaced with non-spherical bushings; any material allowed. Mounts that are replaced may serve no other function or provide any other performance improvement or alteration than the original purpose.”
T4 Consider Solo SSC cross over classification into T4
neutralScion FR-S and Subaru BRZ 13-16 Solo Spec Coupes added to T4, both 1998cc, 2570 lbs, 225/45/17 tires.
In T4, classify the Scion FR-S (13-16) Solo® Spec Coupe as follows:
A specification table follows in the original; it is not shown here.
T4 2012-2015 Honda Civic Si Performance Request
#26129 from James Coughlin · Rule change · TB 19-02 (2019-02 Fastrack)
fasterT4 Honda Civic Si 2012-2015 permitted sway bars increased to 32mm front and rear.
In T4, Honda Civic Si (12-13), add to the notes as follows: “Sway bars up to 32mm front and rear permitted.” In T4, Honda Civic Si (14-15), add to the notes as follows: “Sway bars up to 32mm front and rear permitted.”
neutralT4 Mazda MX-5 Club (06-15) and (2016-), T3 MX-5 Cup and Miata (2016-) hardtop rules clarified; wording changes to permitted parts and specifications.
In T4, Mazda MX-5 / Club Model (06-15), make changes to the notes as follows: “Mazdaspeed MX-5 roof permitted #0000-07-5901-CC or #0000-07-5901 (discontinued DG Motorsports) with +20lb increase to base weight. The SM5 suspension (only) is allowed with a 100 lbs. weight increase. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. Any hard top following the OEM silhouette allowed. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part # 0000-07- 5902-ND and part #0000-07-5901 (discontinued DG Motorsports).” In T4, Mazda MX-5 Miata/Club (2016-), make changes to the notes as follows:
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“Mazdaspeed MX-5 roof permitted #0000-07-5901-CC or #0000-07-5901 (discontinued DG Motorsports) with +20lb increase to base weight. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports).” In T3, Mazda MX-5 Global Cup Miata (2016-), make changes to the notes as follows: “Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports).” In T3, Mazda MX-5 Cup, make changes to the notes as follows: “Any OEM or aftermarket hardtop permitted that retains the OEM roof silhouette, including part Mazda hardtop part #0000-07-5902-ND and #0000-07-5901, the discontinued DG Motorsports top (if a hardtop is used, latches shall be replaced with positive fasteners).” In T3, Mazda MX-5 Miata (2016-), make changes to the notes as follows: “Any OEM or aftermarket hardtop permitted that retains the OEM roof silhouette including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports top).”
T4 Consider opening class rules to allow any thermostat
neutralT2, T3, T4 now allow any thermostat serving only OE intent, previously restricted.
In T2-T4, GCR section 9.1.9.2.D.i, add new wording as follows: “9. Any thermostat is allowed provided it serves no purpose other than the OE intent.”
T4 Cap 2016 Mazda Miata year at 2018
#26388 from Club Racing Board · Rule change · TB 19-03 (2019-03 Fastrack)
neutralT3 and T4 Mazda MX-5 Miata eligibility capped at 2018 model year, effective 2019-03-01.
In T3, Mazda MX-5 Miata (2016-), make changes to years as follows: “(2016-2018)” In T4, Mazda MX-5 Miata/Club (2016-), make change to years as follows: “(2016-2018)”
T4 Request to classify 2000 - 2001 BMW 323
#25096 from Raymond Blethen · Rule change · TB 19-04 (2019-04 Fastrack)
neutralT4 BMW 323 (98-00) newly classified at 3450 lbs with 50mm flat plate restrictor and M52TUB25 engine required.
In T4, classify the BMW 323 (98-00), as follows:
A specification table follows in the original; it is not shown here.
T4 Request to allow piggy back ECU on 2000 Mazda Protégé
#26085 from Jason Huepenbecker · Rule change · TB 19-06 (2019-06 Fastrack)
fasterT4 Mazda Protégé ES 2000 now allows piggyback ECU tuning device; OBD2 requirement waived.
Please make the following changes in T4 as a clarification: Mazda Protégé ES (2000) Notes: May update to MP3 specs. Any spring up to a maximum spring rate of 500 pounds front and 800 pound rear may be used cold air intake system allowed. OEM optional limited slip differential permitted. 32mm OEM style and configuration rear sway bar allowed. Header allowed, Front strut tower brace allowed, OBD2 requirement for ECU does not apply. Secondary ECU tuning device allowed.
T4 Request helper spring as optional
#26678 from Josh Smith · Rule change · TB 19-06 (2019-06 Fastrack)
slowerT4 Mazda MX5 Club Model 06-15 allows suspension package with 100 lbs weight increase including helper springs.
In T4, Mazda MX5/ Club Model (06-15), add to notes as follows: "MSR option permitted. Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front springs #0000-04-9700-08, rear springs #0000-04-9400-07, helper springs#0000-04-HLPR- EB (optional), F/R sway bar kit #GRM5-8MD16, front end links #0000-04-5499, rear end links #0000-04-5498."
T4 MR2 Spyder Year Correction
#26936 from Chi Ho · Rule change · TB 19-07 (2019-07 Fastrack)
neutralT4 Toyota MR-2 Spyder 16V DOHC years corrected from 01-05 to 00-07.
In T4, Toyota MR-2 Spyder 16V DOHC (01-05), correct the years as follows: (01-05 00-07)
T4 Request spare tire/wheel clarification
#27012 from Jim Weidenbaum · Rule change · TB 19-09 (2019-09 Fastrack)
neutralT2-T4 spare tire/wheel rules clarified: removable covers can be removed with hardware and bracketry.
In T2-T4, GCR section 9.1.9.2.D.9.d.3., make changes as follows: "Spare tires and A any removable covers used to cover spare tires, tools, bins, etc., may be removed along with attaching hardware and bracketry."
T4 Research E&O Mazda MX5
#27112 from Josh Smith · Rule change · TB 19-09 (2019-09 Fastrack)
slowerT4 Mazda MX-5 Club (06-15) gains suspension package with 100 lbs weight increase, allows RX8 hubs and SM5 suspension, permits non-OEM LSD with 50 lbs penalty.
In T4, Mazda MX-5 / Club Model (06-15), make changes to the notes as follows: "The following items must remain stock OEM unmodified, unless alternate part numbers are permitted below: original wheels (06-15 factory wheels are allowed), and transmission, differential, and LSD. Factory bolt-in roll bar/cross member may be removed to facilitate roll cage installation. MSR option permitted. Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front spring mount PT#-0000-04-5259, front springs #0000-04-9700-08, rear spring mount PT#- 0000-04-5258, rear springs #0000-04-9400-07, helper springs #0000-04-HLPR-EB (optional),front sway bar kit PT#0000-04-5306-FT, rear sway bar kit PT#-0000-04-5306-RR F/R sway bar kit #GRM5-
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8MD16, front end links #0000-04-5499, rear end links #0000-04-5498., offset front camber bushing PT#- 0000-04-5407-NC. Mazda Motorsports cold air intake part #0000-06-5150-KT allowed. Mazda Motorsport RX8 rear Hub Conversion kit part number 0000-04-5811-KT allowed, RX8 front hubs PT# F189-33-04X allowed. The SM5 suspension (only) is allowed with a 100 lbs. weight increase. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. Allow Mazda header part number 0000-06- 5407. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part # 0000-07-5902-ND 0000-07-5901-CC (discontinued DG Motorsports)."
T4 Clarification of On-Board Fire System for T2
#27183 from Paul Messier · Rule change · TB 19-09 (2019-09 Fastrack)
neutralT2 requires onboard fire system; T3 and T4 may have one per GCR 9.3.
Effective 01/01/2020, In T2-T4, GCR section 9.1.9.2.D.10.c., make changes as follows: "All cars shall have, as a minimum, a fire extinguisher meeting the specifications of GCR Section 9.3 Fire System. Touring 2 cars must have a fire system installed. Touring Category Touring 3 and Touring 4 automobiles may be equipped with a fire system meeting the specifications of GCR Section 9.3 Fire System."
T4 Mustang Ecoboost and GT Transmission
#27439 from Carl Fung · Rule change · TB 20-01 (2020-01 Fastrack)
unclearT3 Ford Mustang EcoBoost 2015- gains three transmission gear ratio options.
In T3, Ford Mustang EcoBoost (2015-), add as follows: "4.24, 2.54,1.67, 1.24,1.00, 0.70 or 4.17, 2.34,1.52, 1.14,0.87, 0.69 or 4.696, 2.985, 2.146, 1.769, 1.520, 1.275, 1.000, .854, .689, .636"
T4 BRZ/FRS/86 Tire Size in T4
#27660 from Jared Lendrum · Rule change · TB 20-01 (2020-01 Fastrack)
slowerT4 BRZ, FR-S, and 86 maximum tire size reduced from 245 to 225.
In T4, Subaru BRZ (13-16), change Tire Size (max) as follows: "245 225" In T4, Scion FR-S (13-16), change Tire Size (max) as follows: "245 225" In T4, Subaru BRZ (2017-), change Tire Size (max) as follows: "245 225" In T4, Toyota 86 (2017-), change Tire Size (max) as follows: "245 225"
T4 NC MX5 2006-2015 Spec Adjustment Request
#27739 from Brian Nelson · Rule change · TB 20-01 (2020-01 Fastrack)
fasterT4 Mazda MX-5 Club Model 06-15 minimum weight cut from 2625 to 2550 lbs.
In T4, Mazda MX-5 / Club Model (06-15), change Weight as follows: "2625 2550"
T4 T4 RX8 Classification Error
#27902 from Raymond Blethen · Rule change · TB 20-01 (2020-01 Fastrack)
neutralMazda RX-8 Base/R3 (04-12) reclassified in T3 and T4 to include Sport and GT variants.
In T3, Mazda RX-8 Base/R3 (04-12), add as follows: "Mazda RX-8 Base/R3/Sport/GT (04-12)" In T4, Mazda RX-8 Base/R3 (04-12), add as follows: "Mazda RX-8 Base/R3/Sport/GT (04-12)"
T4 Request to add Toyota 86 GT to Spec Line
#27910 from John Heinricy · Rule change · TB 20-01 (2020-01 Fastrack)
neutralToyota 86 GT (2017-) added to T3 and T4 Spec Line.
In T3, Toyota 86 (2017-), add as follows: "Toyota 86, GT (2017-)" In T4, Toyota 86 (2017-), add as follows: "Toyota 86, GT (2017-)"
T4 Request to Allow Brake Upgrade on T4 Mustang
#27329 from David Mead · Rule change · TB 20-02 (2020-02 Fastrack)
neutralT4 Ford Mustang V6 05-10 allowed aluminum driveshaft, any LSD, and Ford brake kit M-2300-D.
In T4, Ford Mustang V6 (05-10), add to notes as follows: “An Aluminum driveshaft is allowed. Any LSD permitted. Ford brake kit M-2300-D allowed."
T4 Please Switch the Solstice GXP as Specified in T2, to T3
#27413 from Michael Pettiford · Rule change · TB 20-02 (2020-02 Fastrack)
fasterPontiac Solstice GXP and Saturn Sky move from T2 to T3; wheels widen to 18 x 9.5 inches, Sky weight drops to 3200 lbs.
In T3 Spec Lines, add T2 Spec information for Pontiac Solstice GXP Coupe / Convertible (07-09) with the following changes in Max Wheel Size: "18 x 8 9.5" In T3 Spec Lines, add T2 Spec information for Saturn Sky / Convertible (07-09) with the following changes in Max Wheel Size: "18 x 8 9.5" In T3 Spec Lines, add T2 Spec information for Saturn Sky / Convertible (07-09) with the following changes in Weight:
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"3250 3200"
T4 Request to Classify all Mazda RX8 Models in T3/T4
#27606 from Raymond Blethen · Rule change · TB 20-02 (2020-02 Fastrack)
neutralMazda RX-8 Base/R3/Sport/GT (04-12) classified in T3 effective 2020-02-01.
In T3, change Spec Lines as follows: "Mazda RX-8 Base/R3/Sport/GT (04-12)" In T3, change Spec Lines as follows: "Mazda RX-8 Base/R3/Sport/GT (04-12)"
fasterT4 Mazda3 14-18 gains permitted modifications: springs to 800/1000 lbs, 15 lb wheels, cold air intake, camber plates, 25mm rear bar, mirrors, CorkSport arms, header, specific calipers and rotor.
In T4, Mazda3 (14-18), add to notes as follows: "Any spring up to 800 lbs. front and 1000 lbs. rear springs may be used. Aftermarket wheels at a min. weight of 15 lbs. each. Cold air intake. Front camber plates. 25mm max rear sway bar allowed. Any year OEM Mazda 3 mirrors allowed. CorkSport rear camber arms (Part# AXM-3-318-10) permitted. Header allowed. RH Caliper GHY9-33-99Z, LH Caliper GHY9-33-98Z, Rotor GHR1-33-251A allowed."
T4 Request to allow aftermarket OEM coolant expansion tank
#27763 from Ron Munnerlyn · Rule change · TB 20-02 (2020-02 Fastrack)
neutralT4 allows aftermarket OEM coolant expansion tanks with no other functional purpose.
In T4, GCR section 9.1.9.2.D.3.a.2., add the following: "Any radiator and fans are permitted, provided it mounts in the original location, maintains the same plane as the original core, and requires no body or structural modifications to install. No new openings created by fitting an alternate radiator may be used to duct air to the engine. Any expansion tank permitted as long as it serves no other purpose."
T4 Request to allow aftermarket OEM power steering reservoir
#27764 from Ron Munnerlyn · Rule change · TB 20-02 (2020-02 Fastrack)
neutralT4 Mazda MX-5 Club Model 06-15 now allows aftermarket power steering reservoir.
In T4, Mazda MX-5 / Club Model (06-15) add to notes as follows: "Allow Mazda header part number 0000-06-5407. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop and part #0000-07-5901-CC. Aftermarket power steering reservoir is allowed."
T4 Request for Factory Installed Wings on Subaru BRZ
#27831 from Nick Leverone · Rule change · TB 20-02 (2020-02 Fastrack)
neutralT4 Subaru BRZ and Scion FR-S allowed factory installed wings.
In T4, change Spec Lines as follows: "Subaru BRZ, BRZ Limited (13-16)" In T4, change Spec Lines as follows: "Scion FR-S, 10 series (13-16)"
T4 Request for Replacement Clutches
#27892 from John Heinricy · Rule change · TB 20-02 (2020-02 Fastrack)
neutralT4 now permitted to use any OEM diameter clutch disc and pressure plate, previously T2-T3 only.
In GCR, Section 9.1.9.2.D.i.5., change as follows: "T2-T3 only: Any clutch disc and pressure plate of OEM diameter may be used, provided that they shall be bolted directly to an unmodified stock flywheel and is no lighter than 95% of the factory OEM clutch disc and pressure plate."
T4 Request to Classify Chevy Sonic 1.4 In T4
#27906 from Michael Paramore · Rule change · TB 20-02 (2020-02 Fastrack)
neutralChevrolet Sonic 2011+ added to T4 at 2800 lbs with 1364 cc engine and 225 max tire size.
In T4 Spec Lines, add the Chevrolet Sonic 2011+
A specification table follows in the original; it is not shown here.
T4 Weight Change Request for 1999 Mazda Miata
#28129 from Kenneth H Payson · Rule change · TB 20-02 (2020-02 Fastrack)
In T4, Mazda MX-5 / Miata, 2001-2005, change the weight as follows: "2450 2400" In T4, Mazda MX-5 / Miata, 1999-2000, change the weight as follows: "2450 2400" Recommended Items – Effective February 01, 2020 The letters listed below were voted on by the BoD at the face to face meetings held at the National Convention on January 16, 2020. These rule changes will be effective on February 01, 2020.
T4 Request for 12-13 and 14-15 Honda Civic Springs
neutralT4 Honda Civic Si 12-13 and 14-15 now allow H&R and HPD springs up to 700 pounds with 47mm restrictor.
In T4, Honda Civic Si (12-13), make changes to the notes as follows: "The following items must remain stock: shock/struts (including mounts), original wheels, and transmission differential - unless specified below. Transmission and Differential must be stock. Honda Sport Suspension Kit, part number 08W60- TS9-100 permitted. H&R Sport Springs P/N 51891 and HPD part number (P/N 51410F23SA00) allowed. 47mm flat plate restrictor required. SPC Adjustable Control Arm - P/N 67466 permitted. Sway bars up to 32mm front and rear permitted. Springs allowed up to 700 pounds." In T4, Honda Civic Si (14-15), make changes to the notes as follows:
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"The following items must remain stock: shock/struts (including mounts), original wheels, and transmission differential - unless specified below. Transmission and Differential must be stock. Honda Sport Suspension Kit, part number 08W60- TS9-100 permitted. H&R Sport Springs P/N 51891 and HPD part number (P/N51410F23SA00) allowed. 47mm flat plate restrictor required. Camber plates permitted. Original wheels up to 18” maximum permitted. SPC Rear Adjustable Control Arm – P/N 67467 permitted. Sway bars up to 32mm front and rear permitted. Springs allowed up to 700 pounds."
T4 Request to Clarify T4 05-10 Mustang Spring Allowance
#27899 from David Mead · Rule change · TB 20-03 (2020-03 Fastrack)
neutralT4 Ford Mustang V6 05-10 springs now permitted max 500 lbs front and 400 lbs rear.
In T4, Ford Mustang V6 (05-10), add to the notes as follows: "Any springs max F: 500 and R: 400 permitted."
T4 Request to change allowed header part # for T4 06-15 Miata
#28223 from David Mead · Rule change · TB 20-05 (2019-05 Fastrack)
neutralT4 06-15 Mazda MX-5 now allows header part numbers 0000-06-5407 or 0000-06-5407-NC.
In T4, Mazda MX-5 / Club Model (06-15), change notes as follows: "Allow Mazda header part numbers 0000-06-5407 or 0000-06-5407-NC." Court of Appeals
T4 Z3M Roadster Weight
#28437 from Ryan Ciechanski · Rule change · TB 20-05 (2019-05 Fastrack)
fasterT3 BMW Z3 M & Coupe 1998-1999 weight reduced from 3350 to 3150 lbs.
In T3, BMW Z3 M & Coupe, add years and change weight as follows: "(98-99)" "3350 3150"
T4 Request to Classify 2004 Mercedes Benz 320 CLK
#27663 from Robert Gary · Rule change · TB 20-06 (2020-06 Fastrack)
neutral2004 Mercedes Benz CLK 320 Coupe classified in T4 at 3200 lbs with 3299cc engine and Eibach PN# 2563.140 springs allowed.
In T4, classify the 2004 Mercedes Benz CLK 320 Coupe as follows:
A specification table follows in the original; it is not shown here.
T4 Request to Add a Vehicle to the Roster (contd.)
#27698 from Robert Gary · Rule change · TB 20-07 (2020-08 Fastrack)
unclearCannot read: letter references external document #27663 not provided.
Thank you for your letter. Please refer to letter #27663 in the June 2020 Fastrack. What Do You Think
neutralT4 Mazda RX-8 04-12 now allows OE rear spoiler #F151-V4-920F and OE front air dam #F151-V4-900f-BB.
In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), add to notes as follows: "OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB."
fasterT4 2006-2015 Mazda MX-5 Club Model now allows non-stock wheels; transmission, differential, LSD remain stock.
In T4 Spec Lines, Mazda MX-5 / Club Model (06-15) change Notes as follows: "The following items must remain stock OEM unmodified, unless alternate part numbers are permitted below: original wheels (06-15 factory wheels are allowed), and transmission, differential, and LSD." The Club Racing Board met by teleconference on July 7, 2020. Participating were Peter Keane, Chairman; David Arken, David Daughtery, Jim Goughary, John LaRue, Paula Hawthorne, Sam Henry, and Shelly Pritchett, secretary. Also participating were: Bob Dowie, Chris Albin, and Marcus Meredith, BoD liaisons; Mike Cobb, President, Rick Harris, Club Racing Technical Manager and Scott Schmidt, Series Tech Chief. The following decisions were made:
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Member Advisory No Action Required
T4 Scion FRS Solo Spec Coupe Gear Ratio
#29021 from Matthew Davis · Rule change · TB 20-08 (2020-08 Fastrack)
fasterT4 Scion FRS and Subaru BRZ Solo Spec Coupe final drive ratio changed from 4.30 to 4.10.
In T4 Spec Lines, Scion FR-S Solo® Spec Coupe (13-16), change Final Drive as follows: "4.30 4.10" In T4 Spec Lines, Subaru BRZ Solo® Spec Coupe (13-16), change Final Drive as follows: "4.30 4.10"
Applies to Scion FR-S on this page: Izzy Sanchez, Colin Koehler, Rick Delamare, Roldan de Guzman, Tony Kiratsous, Chi Ho, Darren Seltzer, Felix Borodaty, Kellie Czarny, Scotty B White
Applies to Subaru BRZ on this page: Jared Lendrum, Ken Lendrum, Philip Clarke, Whitfield Gregg
T4 Alfa Romeo 4C Launch Edition
#29531 from John Weisberg · Rule change · TB 20-12 (2020-12 Fastrack)
neutralT3 Alfa Romeo 4C Launch Edition now allowed in Spec Lines.
In T3, Spec Lines, Alfa Romeo 4C (2015-), add to Notes as follows: "Launch Edition allowed"
T4 Post Runoffs Feedback for T4
#29752 from Tim Myers · Rule change · TB 20-12 (2020-12 Fastrack)
In T4, BMW 320i (14-15) Spec Lines, change as follows: Weight: "3150 3100" Notes: "32 31mm TIR required." In T4, Ford Mustang V6 (05-10) Spec Lines, change Notes as follows: "Notes- ABS (option code 552) allowed. FR3 Handling Pack #M-2007-FR3V6 allowed (kit does not need to be run in its entirety). The kit includes: Dampers M-18000-A, Lowering Springs M-5300-N, Sway Bars M- 5490-C, Strut Tower Brace M-20201-F. Ford Positraction LSD part #M-4204-C75 is allowed. Any springs max F: 500 and R: 400 permitted. Any sway bar up to F: 35mm and R: 22mm permitted. Aftermarket Shocks conforming to T4 rules allowed. Panhard bar, part # BAR-M-4264-A permitted or any pan
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hard bar permitted must be set at same length as a stock bar, center mounting hole to center mounting hole +/- 0.25 inch. An alternative steel drive shaft is permitted; this drive shaft is otherwise unrestricted, but no modifications to other components are permitted to facilitate its installation. An Aluminum driveshaft is allowed. Any LSD permitted. Ford brake kit M-2300-D allowed. Aftermarket header allowed." In T4, Honda Civic Si (06-11) Spec Lines, change Notes as follows: "The following items must remain stock: shock/struts (including mounts), original wheels, and transmission differential - unless specified below. Honda Factory Performance Suspension Kit #08W60- SVB-100 allowed. 55mm flat plate restrictor required. Tokico HP shocks allowed (P/N- HE2986, HB2252, HB2251). Eibach springs allowed (P/N 4031.140). Aftermarket Shocks conforming to T4 rules allowed. SPC Adjustable Control Arm - P/N 67466 permitted." In T4, Honda Civic Si (14-15) Spec Lines, change Notes as follows: "Transmission and Differential must be stock. Honda Sport Suspension Kit, part number 08W60- TS9-100 permitted. H&R Sport Springs P/N 51891 and HPD part number (P/N51410F23SA00) allowed. 47mm flat plate restrictor required. Camber plates permitted. Original wheels up to 18” maximum permitted. S PC Rear Adjustable Control Arm – P/N 67467 permitted. Sway bars up to 32mm front and rear permitted. Springs allowed up to 700 pounds." In T4, Mazda3 s (04-09) Spec Lines, change as follows: Weight: "2550 2500" Notes: "ABS option allowed. Miata speedometer gear #M527-17-400A permitted. Any spring up to a maximum spring rate of 500 pounds front and 800 pound rear may be used Cold Air Intake system allowed. OEM optional limited slip differential permitted. Non-OEM limited slip differential allowed +25 lbs. 32mm OEM style and configuration rear sway bar allowed. Header allowed. Front strut tower brace allowed. OBD2 requirement for ECU does not apply. " In T4, Mazda3 (14-18) Spec Lines, change Wheels as follows: "18 x 7 7.5" In T4, Mazda RX-8 Base/R3/Sport/ GT (04-12) Spec Lines, change as follows: Weight: "3125 3075" Notes: "Mazdaspeed radiator #0000-01-8501 allowed. Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3 transmission must be paired with the listed alternate final drive. Only Mazdaspeed front sway bar kit #0000-04-8302- AD and Mazdaspeed coil spring kit #QSEA34-01Z allowed. 60mm flat plate restrictor required. Alternate sway bar permitted, Progressive Technologies Part Number: 61-0543 and 62.1152 allowed. OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB."
T4 Request to Classify BMW M2 CS
#29523 from Victor Leleu · Rule change · TB 21-01 (2021-01 Fastrack)
neutralBMW M2 CS Cup 2020+ classified in T2 at 3625 lbs with 2979cc engine, 10.5x18 wheels, 295 tires.
In T2, classify the BMW M2 CS Cup 2020+ as follows:
A specification table follows in the original; it is not shown here.
T4 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5
#29681 from Tim Wise · Rule change · TB 21-01 (2021-01 Fastrack)
unclearT3 and T4 Mazda MX-5 06-15 now allow Mazda Transmission kit part # 0000-02-5700.
In T4, Spec Lines, Mazda MX-5 / Club Model (06-15), add to Notes as follows: "Mazda Transmission kit part # 0000-02-5700." In T3, Spec Lines, Mazda MX-5 NC (06-15), add to Notes as follows: "Mazda Transmission kit part # 0000-02-5700."
neutralT3 and T4 FR-S, 86, and BRZ year ranges capped: T3 at 2021, T4 at 2017-2021.
In T3, Spec Lines, Scion FR-S/ Toyota 86, GT (13-20), change Year as follows: "(13-20 21)" In T3, Spec Lines, Subaru BRZ (13-20), change Year as follows: "(13-20 21)" In T4, Spec Lines, Subaru BRZ (2017-), change Year as follows: "(20 17-21)" In T4, Spec Lines, Toyota 86, GT (2017-), change Year as follows: "(20 17-21)"
T4 2021 Toyota Supra
#29567 from Ryan Saari · Rule change · TB 21-02 (2021-02 Fastrack)
neutralToyota Supra 2020- newly classified in T2 at 3450 lbs minimum weight with 295 tire and 19-inch wheels.
In T2, classify the Toyota Supra (2020-) as follows: T2 Bore x Stroke(mm)/ Disp.
A specification table follows in the original; it is not shown here.
T4 06-15 MX-5 Durability
#29781 from CHRISTOPHER WINDSOR · Rule change · TB 21-02 (2021-02 Fastrack)
neutralT4 Mazda MX-5 durability rule now applies to T2-T4 instead of T2-T3 only.
In T4, GCR Section 9.1.9.2.D.i.5., change as follows: "T2-T3 4 only:"
T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-)
#29838 from Gary McCormick · Rule change · TB 21-02 (2021-02 Fastrack)
neutralT4 Chevrolet Sonic (2011-) spec clarified: 28mm TIR restrictor placement, PCV plug requirement, and allowed suspension parts listed.
In T4 Spec Lines, Chevrolet Sonic (2011-), change as follows: "Chevrolet Sonic RS (2011-)" In T4 Spec Lines, Chevrolet Sonic (2011-), change Notes as follows: "28mm TIR required and must be placed with the restriction within 10 mm of the end of the stock turbo inlet. The PCV port in the stock turbo inlet must be plugged. Eibach 38160.140 allowed. ZZP Part # ZZ-SNCRSB allowed. Front strut brace allowed. GM suspension kit #2312 → 3679 allowed. H&R 50702 spring kit allowed."
T4 NC MX-5 06-15 Part Number updates for 2021
#29921 from Josh Smith · Rule change · TB 21-02 (2021-02 Fastrack)
neutralT4 Mazda MX-5 06-15 removes front and rear end links from suspension package spec.
In T4, Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows: "The following items must remain stock OEM unmodified, unless alternate part numbers are permitted below: transmission, differential, and LSD. Factory bolt-in roll bar/cross member may be removed to facilitate roll cage installation. MSR option permitted. Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front spring mount PT#-0000-04-5259, front springs #0000-04-9700-08, rear spring mount PT#-0000-04-5258, rear springs #0000-04- 9400-07, helper springs #0000-04-HLPR-EB (optional), Swaybar kit – PT#-0000-04-5306-EB that includes (front sway bar kit PT#0000-04- 5306-FT, rear sway bar kit PT#-0000-04-5306-RR) front end links #0000-04-5499, rear end links #0000- 04-5498, offset front camber bushing PT#-0000-04-5407-NC. Mazda Motorsports cold air intake part #0000-06-5150-KT allowed. Mazda Motorsport
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RX8 rear Hub Conversion kit part number 0000-04-5811-KT allowed, RX8 front hubs PT# F189-33-04X allowed. The SM5 suspension (only) is allowed with a 100 lbs. weight increase. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. Allow Mazda header part numbers 0000-06-5407 or 0000-06-5407-NC. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop and part #0000-07-5901-CC. Aftermarket power steering reservoir is allowed."
T4 BMW Z4 2.5L (03-05) Spec Line
#30037 from ROGER KNUTESON · Rule change · TB 21-02 (2021-02 Fastrack)
fasterT4 BMW Z4 2.5L (03-05) minimum weight reduced from 3100 to 3050 lbs.
In T4 Spec Lines, BMW Z4 2.5L (03-05), change weight as follows: "3100 3050"
Applies to BMW Z4 on this page: Ralph Porter
T4 Sway Bars for T4 2016+ MX5 Mazda
#30063 from David Mead · Rule change · TB 21-02 (2021-02 Fastrack)
neutralT4 2016+ Mazda MX-5 Miata gains allowance for 29mm front and 16mm rear sway bars.
In T4 Spec Lines, Mazda MX-5 Miata (16-18), add to Notes as follows: "29mm (f) 16mm (r) sway bars allowed."
Applies to Mazda MX-5 on this page: Thomas Fowler, Michael Borden, Tyler Quance, Sergio Zlobin, Charles Habisreutinger, Steven Christopher, Timothy Wise, Ryan Heishman, Christopher Windsor, Jeremy Butz, Brian Laughlin, Robert Spence, Richard Mooney, Michael LaMaina, Tim Myers, Kevin Fryer, Brian Price, James Ebben, Jeff Liller, Chalton Lane
Applies to Mazda Miata on this page: David Hooker, Keith Jones
neutralT4 Scion FR-S, Subaru BRZ, and Toyota 86 replace Eibach part 4.10582.880 with 82105.320, 4.10582 and SPC 67660.
In T4 Spec Lines, change Notes as follows: Scion FR-S/10 series (13-16): "Eibach 4.10582.880 82105.320, 4.10582 and SPC 67660 allowed." Subaru BRZ/ BRZ Limited (13-16): "Eibach 4.10582.880 82105.320, 4.10582 and SPC 67660 allowed." Subaru BRZ (17-21): "Eibach 4.10582.880 82105.320, 4.10582 and SPC 67660 allowed." Toyota 86, GT (17-21): "Eibach 4.10582.880 82105.320, 4.10582 and SPC 67660 allowed."
T4 T4 Mustang Axle Ratio and Wheels
#30149 from Scotty White · Rule change · TB 21-02 (2021-02 Fastrack)
slowerT4 Ford Mustang V6 05-10 allows GT 8.8 rear axle with 3.45 or 3.55 ratio at +25 lb penalty.
In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows: "GT 8.8 rear axle assembly allowed. 3.45 or 3.55 final drive ratio allowed with +25lb penalty."
Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller
slowerT2-T4 clutch disc and pressure plate must be at least 95% of factory OEM weight.
In GCR, Section 9.1.9.2.D.1.i.5., change as follows: "T2-T4 only: Any clutch disc and pressure plate of OEM diameter may be used, provided that they shall be bolted directly to an unmodified stock flywheel and is no lighter than 95% of the factory OEM clutch disc and pressure plate."
T4 Mini Cooper Spec Line Anomalies
#30478 from David Oliveira · Rule change · TB 21-05 (2021-05 Fastrack)
unclearT4 Mini Cooper S (02-04, 05-06) suspension/wheel rules simplified; (07-13) gear ratios changed to 3.31, 2.13, 1.48, 1.14, 0.95, 0.82, final drive to 3.65, brakes to 280 mm.
In T4 Spec Lines, Mini Cooper S (02-04), change Notes as follows: "The following items must remain stock: shock/struts (including mounts), original wheels, and transmissiondifferential - unless specified below. JCW struts (F)31 31 6 768 410 (R)33 52 6 768 412,springs (F)31 33 6 768 415 (R)33 53 6 768 418, and Mini Mania strut tower plate NMS7300permitted. Factory limited slip from 05-06 Cooper S permitted. May de-camber wheels by the useof slotted adjusters at the top of the strut mounting plates. They shall be located on the existing chassis structure, utilizing the manufacturers original bolt holes and may not serve as reinforcement for that structure. Convertible model not allowed. Any spring up to a maximum spring rate of 500 lbs. front and 800 lbs. rear may be used." In T4 Spec Lines, Mini Cooper S (05-06), change Notes as follows:
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"The following items must remain stock: shock/struts (including mounts), original wheels, and transmission differential - unless specified below. Convertible model not allowed. Factory optional limited slip differential allowed. JCW struts (F)31 31 6 768 410 (R)33 52 6 768 412, springs (F)31 33 6768 415 (R)33 53 6 768 418. May de-camber wheels by the use of slotted adjusters at the top of the strut mounting plates. They shall be located on the existing chassis structure, utilizing the manufacturers original bolt holes and may not serve as reinforcement for that structure. Any spring up to a maximum spring rate of 500 lbs. front and 800 lbs. rear may be used." In T4 Spec Lines, Mini Cooper S (07-09), change as follows: "(07-09 13)" Gear Ratios: "overall:12.79,7.79, 5.65,4.62, 3.83,3.13 3.31, 2.13, 1.48, 1.14, 0.95, 0.82" Final Drive: "N/A 3.65" Brakes (mm): "277 280"
T4 Request CAI Mustang in T4
#30562 from Scotty B White · Rule change · TB 21-05 (2021-05 Fastrack)
fasterT4 Ford Mustang V6 05-10 now allows cold air intake.
In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows: "Cold Air Intake allowed."
Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller