T4 at Mid-Ohio Sports Car Course

2019-01-01 T4 Errors, Omissions, and Updates (Various)

#22414 from Darren Seltzer · Rule change · TB 19-01 (2019-01 Fastrack)

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:

2019-01-01 T4 Request for Adjustments to fiat 124 specline

#25371 from Christopher Childs · Rule change · TB 19-01 (2019-01 Fastrack)

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.”

2019-01-01 T4 Add Clarification to Spec Car Classifications Vehicle Spec

#25774 from Touring Committee · Rule change · TB 19-01 (2019-01 Fastrack)

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.”

2019-01-01 T4 Clarify Subframe Bushings Permitted for T2-T4

#25800 from Touring Committee · Rule change · TB 19-01 (2019-01 Fastrack)

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.”

2019-01-01 T4 Consider Solo SSC cross over classification into T4

#25802 from Touring Committee · Rule change · TB 19-01 (2019-01 Fastrack)

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.

2019-02-01 T4 2012-2015 Honda Civic Si Performance Request

#26129 from James Coughlin · Rule change · TB 19-02 (2019-02 Fastrack)

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.”

2019-03-01 T4 Correct Mazda MX-5 Hard Top Notes

#26137 from Touring Committee · Rule change · TB 19-03 (2019-03 Fastrack)

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:

2019-03-01 T4 Consider opening class rules to allow any thermostat

#26187 from Touring Committee · Rule change · TB 19-03 (2019-03 Fastrack)

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.”

2019-03-01 T4 Cap 2016 Mazda Miata year at 2018

#26388 from Club Racing Board · Rule change · TB 19-03 (2019-03 Fastrack)

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)”

2019-04-01 T4 Request to classify 2000 - 2001 BMW 323

#25096 from Raymond Blethen · Rule change · TB 19-04 (2019-04 Fastrack)

In T4, classify the BMW 323 (98-00), as follows:

A specification table follows in the original; it is not shown here.

2019-05-31 T4 Request to allow piggy back ECU on 2000 Mazda Protégé

#26085 from Jason Huepenbecker · Rule change · TB 19-06 (2019-06 Fastrack)

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.

2019-05-31 T4 Request helper spring as optional

#26678 from Josh Smith · Rule change · TB 19-06 (2019-06 Fastrack)

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."

2019-07-01 T4 MR2 Spyder Year Correction

#26936 from Chi Ho · Rule change · TB 19-07 (2019-07 Fastrack)

In T4, Toyota MR-2 Spyder 16V DOHC (01-05), correct the years as follows:
(01-05 00-07)

2019-08-31 T4 Request spare tire/wheel clarification

#27012 from Jim Weidenbaum · Rule change · TB 19-09 (2019-09 Fastrack)

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."

2019-08-31 T4 Research E&O Mazda MX5

#27112 from Josh Smith · Rule change · TB 19-09 (2019-09 Fastrack)

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-

2020-01-01 T4 Clarification of On-Board Fire System for T2

#27183 from Paul Messier · Rule change · TB 19-09 (2019-09 Fastrack)

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."

2020-01-01 T4 Mustang Ecoboost and GT Transmission

#27439 from Carl Fung · Rule change · TB 20-01 (2020-01 Fastrack)

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"

2020-01-01 T4 BRZ/FRS/86 Tire Size in T4

#27660 from Jared Lendrum · Rule change · TB 20-01 (2020-01 Fastrack)

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"

2020-01-01 T4 NC MX5 2006-2015 Spec Adjustment Request

#27739 from Brian Nelson · Rule change · TB 20-01 (2020-01 Fastrack)

In T4, Mazda MX-5 / Club Model (06-15), change Weight as follows:
"2625 2550"

2020-01-01 T4 T4 RX8 Classification Error

#27902 from Raymond Blethen · Rule change · TB 20-01 (2020-01 Fastrack)

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)"

2020-01-01 T4 Request to add Toyota 86 GT to Spec Line

#27910 from John Heinricy · Rule change · TB 20-01 (2020-01 Fastrack)

In T3, Toyota 86 (2017-), add as follows:
"Toyota 86, GT (2017-)"
In T4, Toyota 86 (2017-), add as follows:
"Toyota 86, GT (2017-)"

2020-02-01 T4 Request to Allow Brake Upgrade on T4 Mustang

#27329 from David Mead · Rule change · TB 20-02 (2020-02 Fastrack)

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."

2020-02-01 T4 Please Switch the Solstice GXP as Specified in T2, to T3

#27413 from Michael Pettiford · Rule change · TB 20-02 (2020-02 Fastrack)

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:

2020-02-01 T4 Request to Classify all Mazda RX8 Models in T3/T4

#27606 from Raymond Blethen · Rule change · TB 20-02 (2020-02 Fastrack)

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)"

2020-02-01 T4 Request for 2014-2018 Mazda 3 GT Brakes

#27659 from Derrick Ambrose · Rule change · TB 20-02 (2020-02 Fastrack)

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."

2020-02-01 T4 Request to allow aftermarket OEM coolant expansion tank

#27763 from Ron Munnerlyn · Rule change · TB 20-02 (2020-02 Fastrack)

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."

2020-02-01 T4 Request to allow aftermarket OEM power steering reservoir

#27764 from Ron Munnerlyn · Rule change · TB 20-02 (2020-02 Fastrack)

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."

2020-02-01 T4 Request for Factory Installed Wings on Subaru BRZ

#27831 from Nick Leverone · Rule change · TB 20-02 (2020-02 Fastrack)

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)"

2020-02-01 T4 Request for Replacement Clutches

#27892 from John Heinricy · Rule change · TB 20-02 (2020-02 Fastrack)

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."

2020-02-01 T4 Request to Classify Chevy Sonic 1.4 In T4

#27906 from Michael Paramore · Rule change · TB 20-02 (2020-02 Fastrack)

In T4 Spec Lines, add the Chevrolet Sonic 2011+

A specification table follows in the original; it is not shown here.

2020-02-01 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.

2020-03-01 T4 Request for 12-13 and 14-15 Honda Civic Springs

#27848 from Derrick Ambrose · Rule change · TB 20-03 (2020-03 Fastrack)

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:

2020-03-01 T4 Request to Clarify T4 05-10 Mustang Spring Allowance

#27899 from David Mead · Rule change · TB 20-03 (2020-03 Fastrack)

In T4, Ford Mustang V6 (05-10), add to the notes as follows:
"Any springs max F: 500 and R: 400 permitted."

2020-05-01 T4 Request to change allowed header part # for T4 06-15 Miata

#28223 from David Mead · Rule change · TB 20-05 (2019-05 Fastrack)

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

2020-05-01 T4 Z3M Roadster Weight

#28437 from Ryan Ciechanski · Rule change · TB 20-05 (2019-05 Fastrack)

In T3, BMW Z3 M & Coupe, add years and change weight as follows:
"(98-99)"
"3350 3150"

2020-06-01 T4 Request to Classify 2004 Mercedes Benz 320 CLK

#27663 from Robert Gary · Rule change · TB 20-06 (2020-06 Fastrack)

In T4, classify the 2004 Mercedes Benz CLK 320 Coupe as follows:

A specification table follows in the original; it is not shown here.

2020-07-01 T4 Request to Add a Vehicle to the Roster (contd.)

#27698 from Robert Gary · Rule change · TB 20-07 (2020-08 Fastrack)

Thank you for your letter. Please refer to letter #27663 in the June 2020 Fastrack.
What Do You Think

2020-07-01 T4 T4 RX8 bodywork clarification

#28941 from Touring Committee · Rule change · TB 20-07 (2020-07 Fastrack)

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."

2020-07-01 T4 2006-2015 MX-5 Clarification

#28942 from Touring Committee · Rule change · TB 20-07 (2020-07 Fastrack)

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:

2020-08-01 T4 Scion FRS Solo Spec Coupe Gear Ratio

#29021 from Matthew Davis · Rule change · TB 20-08 (2020-08 Fastrack)

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"

2020-12-01 T4 Alfa Romeo 4C Launch Edition

#29531 from John Weisberg · Rule change · TB 20-12 (2020-12 Fastrack)

In T3, Spec Lines, Alfa Romeo 4C (2015-), add to Notes as follows:
"Launch Edition allowed"

2020-12-01 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

2021-01-01 T4 Request to Classify BMW M2 CS

#29523 from Victor Leleu · Rule change · TB 21-01 (2021-01 Fastrack)

In T2, classify the BMW M2 CS Cup 2020+ as follows:

A specification table follows in the original; it is not shown here.

2021-01-01 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)

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."

2021-01-01 T4 Request Mustang 8.8” rear axle replacement

#29860 from Randall Smart · Rule change · TB 21-01 (2021-01 Fastrack)

In T4, Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"GT 8.8 rear axle assembly with 3.55 final drive allowed with +25lb penalty."

2021-01-01 T4 Cap year range on all 86s

#29908 from Touring Committee · Rule change · TB 21-01 (2021-01 Fastrack)

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)"

2021-02-01 T4 2021 Toyota Supra

#29567 from Ryan Saari · Rule change · TB 21-02 (2021-02 Fastrack)

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.

2021-02-01 T4 06-15 MX-5 Durability

#29781 from CHRISTOPHER WINDSOR · Rule change · TB 21-02 (2021-02 Fastrack)

In T4, GCR Section 9.1.9.2.D.i.5., change as follows:
"T2-T3 4 only:"

2021-02-01 T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-)

#29838 from Gary McCormick · Rule change · TB 21-02 (2021-02 Fastrack)

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."

2021-02-01 T4 NC MX-5 06-15 Part Number updates for 2021

#29921 from Josh Smith · Rule change · TB 21-02 (2021-02 Fastrack)

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

2021-02-01 T4 BMW Z4 2.5L (03-05) Spec Line

#30037 from ROGER KNUTESON · Rule change · TB 21-02 (2021-02 Fastrack)

In T4 Spec Lines, BMW Z4 2.5L (03-05), change weight as follows:
"3100 3050"

2021-02-01 T4 Sway Bars for T4 2016+ MX5 Mazda

#30063 from David Mead · Rule change · TB 21-02 (2021-02 Fastrack)

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: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2021-02-01 T4 Change part numbers on BRZ, FRS lines in T4

#30104 from Touring Committee · Rule change · TB 21-02 (2021-02 Fastrack)

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."

2021-02-01 T4 T4 Mustang Axle Ratio and Wheels

#30149 from Scotty White · Rule change · TB 21-02 (2021-02 Fastrack)

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 on this page: Scotty B White, Matthew Miller

2021-03-01 T4 E & O T4 Mustang Wheels

#30245 from Touring Committee · Rule change · TB 21-03 (2021-03 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-10), change wheels as follows:
"17 18 x 8"

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2021-04-01 T4 Request consistency review in GCR

#30263 from Randall Smart · Rule change · TB 21-04 (2021-04 Fastrack)

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."

2021-05-01 T4 Mini Cooper Spec Line Anomalies

#30478 from David Oliveira · Rule change · TB 21-05 (2021-05 Fastrack)

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:

Applies to Mini Cooper S on this page: Trenton Kramer

2021-05-01 T4 Request CAI Mustang in T4

#30562 from Scotty B White · Rule change · TB 21-05 (2021-05 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"Cold Air Intake allowed."

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2021-06-01 T4 Civic Type R Brake Rotors

#29817 from Touring Committee · Rule change · TB 21-06 (2021-06 Fastrack)

In T3 Spec Lines, Honda Civic Type-R(2017-), add to notes as follows:
"2020+ model years allowed part #45251-TGH-A01 with a 25lb penalty."

2021-07-01 T4 Wrong Part Number on 320i Spec Line

#30645 from chi ho · Rule change · TB 21-07 (2021-07 Fastrack)

In T4 Spec Lines, BMW 320i (14-15), change Notes as follows:
"20121.140 E10-20-031-01-22"

2021-11-01 T4 Request to Classify 2014 VW Jetta 1.8t TSI

#30436 from Warren Williams · Rule change · TB 21-09 (2021-09 Fastrack)

In T4 Spec Lines, change as follows effective 11/1/21:
"Volkswagen Passat, Jetta 1.8T (2014-)"

2021-12-01 T4 Nissan Sentra SE-R Spec. V

#30958 from Michael Updegraff · Rule change · TB 21-12 (2021-12 Fastrack)

In T4 Spec Lines, classify Nissan Sentra SE-R Spec V (2007-2012) as follows:

A specification table follows in the original; it is not shown here.

2021-12-01 T4 Mazda RX-8 Spec Line Suspension Parts

#31113 from Josh Smith · Rule change · TB 21-12 (2021-12 Fastrack)

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"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. Eibach springs 0000-04-9700-08, 0000-04-9400-07, and 0000-04-9926 allowed. Alternate sway bars
allowed max 32mm (f) 19mm (r)."

2021-12-01 T4 Diverter Valve Plunger Upgrade

#31307 from Chi Ho · Rule change · TB 21-12 (2021-12 Fastrack)

In T4 Spec Lines, BMW 320i (14-15), add to notes the following:
"GFB T9357 aluminum diverter valve allowed."

2021-12-01 T4 Adjust Honda FWD in T4 to encourage more Drivetrain Diversity

#31472 from Oscar Jackson · Rule change · TB 21-12 (2021-12 Fastrack)

In T4 Spec Lines, Honda Civic Coupe & Sedan EX-T (16-17) Hatch LX & Sport (2016-), change as follows:
Wheel Size (in.): "17 x 7 8"
Tire Size (max): "235 245"
Add to Notes: "Front sway bar allowed 29mm max. Rear Sway bar allowed 22mm max."

2021-12-01 T4 Touring 4 BOP adjustments for 2022

#31482 from Touring Committee · Rule change · TB 21-12 (2021-12 Fastrack)

In T4 Spec Lines, T4 Mazda MX-5 Miata/Club (16-18), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must remain
stock: shock/struts (including mounts), original wheels, and transmission differential - unless specified below."
In T4 Spec Lines, Volkswagen Rabbit 2.5 (08-09), change Weight as follows:
"2850 2675"
In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"GT 8.8 rear axle assembly with 3.55 final drive allowed with +25lb penalty. 7.5 rear axle assembly with 3.45:1 final
drive allowed with +25lb penalty. Cold Air Intake allowed"

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2022-01-01 T4 Reply to letter 29879 T2-T4 Grill Openings

#31486 from Andrew Aquilante · Rule change · TB 22-01 (2022-01 Fastrack)

In T2-T4, GCR section 9.1.9.2.D.8.a.8, clarify as follows:
"Exclusively for For the sole purpose of engine radiator cooling purposes, it is permitted to remove the outermost non-metallic
webbed false grill openings that are closed in mesh style factory grill openings. Maximum allowable increase in grill opening area
is 16 square inches. The modified grill opening mesh shape and contour must be retained as delivered from the manufacturer.
This allowance does not permit modification to dedicated brake-only or intercooler-only grill openings. (Note - It is the
competitor’s responsibility to be able to verify that 16 or fewer square inches have been removed.)"

2022-01-01 T4 Please Adjust 98-00 BMW 323 Min Weight to Reflect Current Class

#31595 from Griffin Gamcsik-Uly · Rule change · TB 22-01 (2022-01 Fastrack)

In T4 Spec Lines, BMW 323 (98-00), change as follows:
Weight: "3450 3250"
Notes: "Up to 850lb. springs F/R permitted, 27mm front sway bar, 24mm rear sway bar permitted. 50mm flat plate restrictor
required. M52TUB25 engine required."

2022-01-01 T4 Consolidate 12-13 and 14-15 Honda Civic Si spec lines for T4

#31596 from Griffin Gamcsik-Uly · Rule change · TB 22-01 (2022-01 Fastrack)

In T4 Spec Lines, Honda Civic Si (12-13), delete Spec Line in its entirety.
In T4 Spec Lines, Honda Civic Si (14-15), change as follows:
Model Year: "Honda Civic Si (14 12-15)"
Notes: "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. SPC Rear Adjustable Control Arm – P/N 67467 or 67466 permitted. Sway bars up to 32mm front and rear permitted.
Springs allowed up to 700 pounds."

2022-01-01 T4 Request to clarify radiator hoses

#31682 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

In GCR, Section 9.1.9.2.D.3.a., add the following:
"3. Radiator and coolant hoses may be replaced with aftermarket options. Modification for coolant temp sensors is permitted."

2022-01-01 T4 Clarify Permitted/Allowed

#31743 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

In GCR, Section 9.1.9.2.C.4., add the following"
"b. Spec lines may include modifications that are "permitted" or "allowed". This means that they are a permitted as alternatives
to the allowances written into the category rules. For example "Koni shock #xxxxxxx allowed" implies that you could use the Koni
option or any option that complies with the category rules."

2022-01-01 T4 Correct RSX wording

#31746 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

In T4 Spec Lines, Acura RSX/ RSX Type-S (02-06), change Notes as follows:
"The following items must remain stock: original wheels."

2022-01-01 T4 Camaro

#31751 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

In T4 Spec Lines, Chevrolet Camaro V-6 (96-02), change Notes as follows:
"The following items must remain stock: shock/struts (including mounts), and transmission differential unless specified below."

2022-02-01 T4 MX-5 Durability Detailed

#31102 from CHRISTOPHER WINDSOR · Rule change · TB 22-02 (2022-02 Fastrack)

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), 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

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2022-02-01 T4 Request Allowances for 2005 - 2010 Mustang

#31624 from Rich Grunenwald · Rule change · TB 22-02 (2022-02 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"Koni part numbers 8741.1494 (front) and 8741.1240 (rear)."

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2022-03-01 T4 Reply to letter #31486/29879 T2-T4 Grill openings

#31935 from Andrew Aquilante · Rule change · TB 22-03 (2022-03 Fastrack)

In T2-T4, GCR Section 9.1.9.2.D.8.a.8., change as follows:
"For the sole purpose of engine radiator cooling, it is permitted to remove the outermost non-metallic webbed false grill
openings that are closed in mesh style factory grill openings. Maximum allowable increase in grill opening area is 16 square
inches. The modified grill opening mesh shape and contour must be retained as delivered from the manufacturer. This allowance
does not permit modification to dedicated brake-only or intercooler-only grill openings. Note - It is the competitor’s
responsibility to be able to verify that 16 or fewer square inches have been removed."

2022-03-01 T4 BRZ vs BRZ TS

#32022 from Touring Committee · Rule change · TB 22-03 (2022-03 Fastrack)

In T3 Spec Lines, Subaru BRZ TS (13-21), change car as follows:
"Subaru BRZ, BRZ TS (13-21)”
Appendix P. Racing Room & Passing Guidelines
Revised January 2022
The Club Road Racing Program sincerely thanks Randy Pobst and Terry Earwood for developing these
guidelines defining racing room and passing etiquette. Randy Pobst is a SCCA Hall of Fame member, a National
Road Racing and Solo Champion, professional driver champion, and a very experienced driver’s coach. Terry
Earwood is a legendary Skip Barber driver instructor, professional driver champion, professional driver’s coach,

2022-04-01 T4 Request to Allow the Use of Aftermarket ECU's in Touring

#31067 from Harley Kaplan · Rule change · TB 22-04 (2022-04 Fastrack)

In T2-T4, GCR Section 9.1.9.2., Introduction, add as follows:
“Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific allowances
permitted. In addition T2-T4 cars may race one class up in touring classes above their specification line class as long as they are a
legal T2-T4 car and conform to their specification line allowances as classified.
Note-Model year cars 2018 or later may request a spec line adjustment which permits use of a non-oem ECU with a 75# weight
addition.”

2022-04-01 T4 Request JWT BSR Kit for 02-06 Nissan Sentra SE-R/Spec V

#31685 from Griffin Gamcsik-Uly · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, Nissan Sentra SER Spec-V (02-06), add to Notes the following:
"Balance shaft removal kit- OQR25-NOBAL permitted."

2022-04-01 T4 Please Confirm Touring 4 (98-00) BMW 323 is E46 generation

#31972 from Griffin Gamcsik-Uly · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, BMW 323 (98-00), change Wheelbase and Final Drive as follows:
Wheelbase: "2700 2725"
Final Drive: "2.93 3.07"

2022-04-01 T4 RX-8 Spring Part Numbers (E&O)

#32151 from Josh Smith · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"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. Mazdaspeed coil spring kit #QSEA-34-01Z allowed. 60mm flat
plate restrictor required. OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. Eibach springs
0000- 04-9700-08, 0000-04-9400-07, Springs Allowed: (F) Mazda Motorsports- 0000- 04-9700-08 or Eibach- 0800.250.0700 (R)
Mazda Motorsports- 0000-04-9400-07 or Eibach 0700.250.0400, and Helper 0000-04-9926 allowed. Alternate sway bars allowed
max 32mm (f) 19mm (r)."

2022-04-01 T4 04-09 Mazda3 Tire Limit Clarification

#32249 from Chris Taylor · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, Mazda3 s (04-09), change Tire Size as follows:
"235 245"

2022-04-01 T4 Shock Part Number Errors & Omissions

#32252 from Rich Grunenwald · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-10), change Notes as follows:
"Koni part numbers 8741.1494 8741-1494SPORT (front) and 8741.1240 8241-1240SPORT (rear)."

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2022-04-01 T4 Update Solo Spec Coupe to latest '20 specs for Road Racing

#32262 from Benjamin Bunk · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, Scion FR-S Solo® Spec Coupe (13-16), change Notes as follows:
"Modifications limited to 2018 2020 SCCA® Solo® Spec Coupe Official Specifications, dated 1-30-2018 Rev 7/20."
In T4 Spec Lines, Subaru BRZ Solo® Spec Coupe (13-16), change Notes as follows:
"Modifications limited to 2018 2020 SCCA® Solo® Spec Coupe Official Specifications, dated 1-30-2018 Rev 7/20."

2022-04-01 T4 Request 2016 Mazda MX5 springs

#32265 from Brian Price. · Rule change · TB 22-04 (2022-04 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following:
"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)."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2022-05-01 T4 Request to Add Spec Line for 2004-2009 Mazda3 i 2.0

#32395 from Michael Ogren · Rule change · TB 22-05 (2022-04 Fastrack)

In T4 Spec Lines, Mazda 3 S (04-09), change as follows:
Bore x Stroke(mm)/ Displ. (cc): "87.5 x 94.0 2260 or 87.5 x 83.1 1999"
Weight (lbs): "2.3l 2500, 2.0l 2425"

2022-05-01 T4 Request Alternate Front & Rear Strut/Shock Top Hats

#32452 from Raymond Blethen · Rule change · TB 22-05 (2022-04 Fastrack)

In TOURING (T2-T4) CATEGORY, GCR Section 9.1.9.2.D.5.b.2, add the following:
"f. Cars with an alternative spring allowance are permitted to use performance alternative top hats on shocks and struts. These
top hats are permitted to utilize spherical bearings."

2022-06-01 T4 Request Wider Wheels for Hyundai Tiburon

#32536 from Kyle Keenan · Rule change · TB 22-06 (2022-06 Fastrack)

In T4 Spec Lines, Hyundai Tiburon V-6 (03-08), change Wheel Size as follows:
"17 x 7 8"

2022-08-01 T4 04-09 Mazda3 Balance Shaft Delete Kit

#32795 from Chris Taylor · Rule change · TB 22-08 (2022-08 Fastrack)

In T4 Spec Lines, Mazda3 s (04-09), add to Notes the following:
"Corksport balance shaft delete part# GEN-6-504-10 permitted."

2022-10-01 T4 Another 2022 BRZ/86 T3 request

#32945 from Touring Committee · Rule change · TB 22-10 (2022-10 Fastrack)

In T3 Spec Lines, Subaru BRZ (2022-), change as follows:
Weight: "2750 2975"
Notes: "Any spring up to 750 1000 F/R permitted. Front strut tower brace permitted. SPC or SPL rear lower control arms
permitted. Cold air intake allowed. Subaru brake parts 26292CA070 & 26292CA060 allowed with 100 lb penalty."

2022-12-01 T4 T4 mustang

#32789 from Scotty B White · Rule change · TB 22-12 (2022-12 Fastrack)

In T4 Spec Lines, Ford Mustang V6(05-10), change as follows:
Wheel size: "18x8 9"
Brakes: "(F) 292 314 Vented Disc (R) 299.8 Vented Disc"
Weight: "3300 3275"
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-M4264-A permitted or any pan

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2022-12-01 T4 Mazda OEM LSD was letter 32655

#32933 from Touring Committee · Rule change · TB 22-12 (2022-12 Fastrack)

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change as follows:
Weight: "2625 2600"
Notes: "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), 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

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2023-01-01 T4 Allowable Springs and Sway Bars for 06-11 Civic si Spec Line

#33294 from Mathew Milford · Rule change · TB 23-01 (2023-01 Fastrack)

In T4 Spec Lines, Honda Civic Si (06-11), add to Notes as follows:
"Sway bars up to 32mm front and rear permitted. Springs allowed up to 700 pounds."

2023-01-01 T4 Touring (T2-T5) Category

#33617 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)

In GCR, CARS AND EQUIPMENT, section 9.1.9. TOURING CATEGORY CLASSES: add the following:
"Touring 5 (T5)"
In GCR, Section 9.1.9.2. Touring (T2-T5) Category, change as follows:
"Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific allowances
permitted. In addition T2-T5 cars may race one class up in touring classes above their specification line class as long as they are a
legal T2-T4 5 car and conform to their specification line allowances as classified. T5 is a Regional only class."
In GCR, Section 9.1.9.2.D.1.i.5., change as follows:
"T2-T4 5 only:"

2023-01-01 T4 ENO 9.1.9.2.D.1.e.1.a.

#33651 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)

In GCR Touring (T2-T5) Category Specifications, Section 9.1.9.2.D.1.e.1.a, change as follows:
"A maximum of 3.5 degrees of negative ch amber is allowed on front and rear suspensions."

2023-02-01 T4 2019-2021 Mazda MX5 ND2

#32027 from Touring Committee · Rule change · TB 23-02 (2023-02 Fastrack)

In T4 Spec Lines, classify Mazda MX-5 Miata/Club/ RF (19-21) as follows:

A specification table follows in the original; it is not shown here.

2023-02-01 T4 Mustang OEM Grill Request

#33333 from Norm Benson · Rule change · TB 23-02 (2023-02 Fastrack)

In T2 Spec Lines, Ford Mustang GT 5.0L (11-14), add to Notes the following:
"Upper grille fog lights may be removed and replaced with mesh or screen."
In T2 Spec Lines, Ford Mustang V6 (11-14), add to Notes the following:
"Upper grille fog lights may be removed and replaced with mesh or screen."
In T3 Spec Lines, Ford Mustang V6 (11-14), add to Notes the following:
"Upper grille fog lights may be removed and replaced with mesh or screen."

2023-02-01 T4 Mazda OEM LSD was letter 32655 typo

#33666 from Touring Committee · Rule change · TB 23-02 (2023-02 Fastrack)

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows:
"Mazda Motorsports LSD #3265 5 0000-02-5564 permitted without penalty."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2023-03-01 T4 BMW 320I intercooler

#33762 from Chi Ho · Rule change · TB 23-03 (2023-03 Fastrack)

In T3 Spec Lines, BMW- 320I, add to Notes the following:
"Aftermarket intercooler permitted."

2023-04-01 T4 Request to Classify 2004-2008 Acura TSX in T4

#33590 from William Phee · Rule change · TB 23-04 (2023-04 Fastrack)

In T4 Spec lines, classify Acura TSX (2004-2008) as follows:

A specification table follows in the original; it is not shown here.

2023-04-01 T4 T4 Mustang Brakes/Swaybar

#34036 from Scotty B White · Rule change · TB 23-04 (2023-04 Fastrack)

In T4 Spec Lines, Ford Mustang (2005-2010), change Notes as follows:
"Any sway bar up to F: 35mm and R: 22mm 28mm permitted."

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2023-06-01 T4 05-06 Mini Wheel Weight

#34112 from Mav Singh · Rule change · TB 23-06 (2023-05 Fastrack)

In T4 Spec Lines, Mini Cooper S (02-04), change as follows:
Wheel Size: "16 x 7 17 x 8"
Add to Notes: "Wheels conforming to B-spec rules are permitted."
In T4 Spec Lines, Mini Cooper S (05-06), change as follows:
Wheel Size: "16 x 7 17 x 8"
Add to Notes: "Wheels conforming to B-spec rules are permitted."
In T4 Spec Lines, Mini Cooper S (07-13), change as follows:
Wheel Size: "17 x 7 8"

Applies to Mini Cooper S on this page: Trenton Kramer

2023-06-01 T4 06-09 VW Rabbit

#34153 from Cameron Conover · Rule change · TB 23-06 (2023-05 Fastrack)

In T4 Spec Lines, delete Volkswagen Rabbit 2.5 (06-07) in its entirety and change Volkswagen Rabbit 2.5 (08-09) as follows:
"Volkswagen Rabbit 2.5 (08 06-09)"
Add to Notes: "Integrated Engineering intake IEIMVB1-BK allowed with 25lb penalty."

2023-06-01 T4 96-01 Audi a4 2.8 Spring Rate

#34217 from Michael Gordhamer · Rule change · TB 23-06 (2023-05 Fastrack)

In T4 Spec Lines, Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05), change as follows:
Wheel Size: "16 x 7 17 x 8"
Tire Size: "225 245"
Notes: "The following items must remain stock: shock/struts (including mounts), original wheels, and transmission differential -
unless specified below. 800lb springs allowed. Front and rear sway bars permitted 32mm max."

2023-07-01 T4 2002-2006 Mini Cooper S R53 Spec Line Request

#34336 from Aaron Fitzsimmons · Rule change · TB 23-06 (2023-07 Fastrack)

In T4 Spec Lines, Mini Cooper S (02-04), change Weight as follows:
"2750 2700"
In T4 Spec Lines, Mini Cooper S (05-06), change Weight as follows:
"2750 2700"

Applies to Mini Cooper S on this page: Trenton Kramer

2023-08-01 T4 Rules Clarification for Mazda RX8 Spec Line

#34395 from Colin Koehler · Rule change · TB 23-08 (2023-08 Fastrack)

In T3 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change notes as follows:
"Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3 transmission must be paired with the listed
alternate final drive. Front sway bar permitted 32mm MAX rear sway bar 19 MAX, Front springs max 750, 500 rear. Cold air
intake permitted. Header permitted. Aftermarket flywheel and single disc clutch permitted with no weight penalty."
In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change notes as follows:
"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. Mazdaspeed coil spring kit #QSEA-34-01Z allowed. 60mm flat
plate restrictor required. OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. Springs Allowed:

2023-08-01 T4 rule book corrections

#34437 from Chi Ho · Rule change · TB 23-08 (2023-08 Fastrack)

In T3 Spec Lines, BMW 320i (14-15), add to Notes the following:
"Aftermarket intercooler permitted."
In T4 Spec Lines, BMW 320i (14-15), remove from Notes the following:
"Aftermarket intercooler permitted."

2023-08-01 T4 Ride Height Correction for the T3 Solstice.

#34615 from Joe Aquilante · Rule change · TB 23-08 (2023-08 Fastrack)

In T2 Spec Lines, Pontiac Solstice GXP Coupe / Convertible (07-09), add to Notes the following:
"Minimum ride height is 3 inches."
In T3 Spec Lines, Pontiac Solstice GXP Coupe / Convertible (07-09), add to Notes the following:
"Minimum ride height is 3 inches."

2023-09-01 T4 Inclusion of similar car. (CLK 320)

#34626 from Patrick Morgan · Rule change · TB 23-09 (2023-09 Fastrack)

In T4 Spec Lines, Mercedes Benz CLK 320 Coupe (2004), change as follows:
"Mercedes Benz CLK 320 Coupe, C320 Sedan (2004 2000-2007)

2024-01-01 T4 Mazda MX-5 ND1 Spec Line Request

#34232 from Josh Smith · Rule change · TB 24-01 (2024-01 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club/ RF (16-18), change as follows:
Weight: "2650 2700"
Notes: "Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must
remain stock: transmission differential unless specified below. Retractable hardtop option permitted but must be disabled from
moving action and positively fastened. 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). 29mm (f) 16mm (r)
sway bars allowed. 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). Up to 500lb front and 300lb rear

2024-01-01 T4 BRZ/FRS/86 Spring Allowance

#35038 from Luis Goncalves · Rule change · TB 24-01 (2024-01 Fastrack)

In T4 Spec Lines, Scion FR-S/10 series (13-16), change Notes as follows:
"Eibach 82105.320, 4.10582 and SPC 67660 allowed. Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f)
and 300 lb (r) springs allowed. SPC 67660 allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top
permitted. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. 55mm flat plate restrictor required. Only 17”
wheels permitted."
In T4 Spec Lines, Subaru BRZ/ BRZ Limited (13-16), change Notes as follows:
"Eibach 82105.320, 4.10582 and SPC 67660 allowed. Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f)
and 300 lb (r) springs allowed. SPC 67660 allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top

Applies to Toyota 86 on this page: Chip Herr

2024-01-01 T4 TSX Allowance

#35219 from Oscar Jackson · Rule change · TB 24-01 (2024-01 Fastrack)

In T4 Spec Lines, Acura TSX (2004-2008), add to Notes the following:
"Header allowed."

2024-01-01 T4 Requested Update of Model Years of 370Z

#35231 from Richard Kulach · Rule change · TB 24-01 (2024-01 Fastrack)

In T3 Spec Lines, Nissan 370Z (09-16) / 370Z NISMO Edition (09-13), change model as follows:
"Nissan 370Z (09-16) / 370Z NISMO Edition (09-13) ,incl. Nismo (2009-2022)"

2024-02-01 T4 More Car Lightening Stuff

#35319 from Scotty B White · Rule change · TB 24-02 (2024-02 Fastrack)

In GCR, Section 9.1.9.2.D.1.g.3., change as follows:
"Batteries may be replaced provided the replacement is capable of starting the car. Batteries may not be relocated
unless noted on the spec line. Batteries must be adequately secured. Battery labeling must conform to 9.3.35.D. with
those of an alternate manufacturer, provided they are of similar amp-hour capacity, size and within 10% of OEM
weight."

2024-02-01 T4 ND Missed Items

#35352 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following:
"3rd and 4th gear may be replaced with the following parts- (0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-
02, 0000-02-5804-01)."
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-21), add to Notes the following:
"3rd and 4th gear may be replaced with the following parts- (0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-
02, 0000-02-5804-01)."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2024-02-01 T4 Inclusion of B-C spec cars in T4

#35374 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

In GCR, Section 9.1.9.2., change as follows:
"Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific
allowances permitted. In addition, T2-T4 cars may race one class up in touring classes above their specification line class
as long as they are a legal T2-T4 car and conform to their specification line allowances as classified. Cars conforming to
C-Spec rules are permitted to compete in Touring 4."

2024-02-01 T4 T2-T4 Set expiration dates on spec lines

#35378 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

In T2-T4 Spec Lines, add **This Spec line will expire 12/31/24, Please submit to appeal**
to Notes to the following Spec Lines:
T2:
Acura TL SHAWD (10-13)
Audi S4 (12-14)
Audi S5 (13-14)
Audi TT RS (2018-)
Cadillac ATS-V (16-17)

2024-03-01 T4 Reorganize Spec Lines

#35375 from Touring Committee · Rule change · TB 24-03 (2024-03 Fastrack)

In T2-T4 Spec Lines, change Spec Line as follows:
"Wheel- base (mm) Required Restrictor"

2024-03-01 T4 Allow any 400lb rear spring in the RX8

#35433 from Raymond Blethen · Rule change · TB 24-03 (2024-03 Fastrack)

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"Mazda Motorsports- 0000- 04-9700-08 or Eibach- 0800.250.0700 (R) Mazda Motorsports- 0000-04-9400-07 or Eibach
0700.250.0400, and helper 0000-04-9926 allowed. Springs allowed 700lb (f), 400(r)."

2024-03-01 T4 370Z Brake Rotor Size Correction

#35487 from Derek Chan · Rule change · TB 24-03 (2024-03 Fastrack)

In T2 Spec Lines, Nissan 370Z (09-17) / 370Z NISMO Edition (09-17), change Brakes (mm) as follows:
"(F)320 x 28 Vented R)320 x 16 Vented : (F) 355x32mm Vented(R) 350x20mm Vented”
In T3 Spec Lines, Nissan 370Z, incl. Nismo (2009-2022), change Brakes (mm) as follows:
"(F)320 x 28 Vented (R)320 x 16 Vented : (F) 355x32mm Vented(R) 350x20mm Vented”

2024-04-01 T4 Corrections to T4 RX8 Spec line

#35767 from Touring Committee · Rule change · TB 24-04 (2024-04 Fastrack)

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"Mazdaspeed radiator #0000-01-8501 allowed. Mazdaspeed coil spring kit #QSEA-34-01Z allowed. OE Rear spoiler allowed
#F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. Springs allowed 700lb (f) max, 400(r) max. Oil metering pump may
be bypassed. Alternate sway bars allowed max 32mm (f) 19mm (r)."

2024-05-01 T4 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj.

#35761 from David Mead · Rule change · TB 24-05 (2024-05 Fastrack)

In T3 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), add to Notes as follows:
"OEM oil injection system may be removed or disabled."
In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), add to Notes as follows:
"OEM oil injection system may be removed or disabled."

2024-05-01 T4 2023 ND2 Miata Classification and Allowances

#35837 from Coyote Black · Rule change · TB 24-05 (2024-05 Fastrack)

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-21), change Year as follows:
"(19-21 24)"
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-21), add to Notes as follows:
"Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front springs #0000-04-9700-
08, springs up to 500lb front and 300lb rear allowed. Mazda tower brace 0000-04-5626 allowed."

2024-05-01 T4 Errors and Omissions for 06-09 VW Rabbit Rotor

#35851 from Andrew Burke · Rule change · TB 24-05 (2024-05 Fastrack)

In T4 Spec Lines, Volkswagen Rabbit 2.5 (06-09), change Brakes as follows:
"(F) 228 288 Vented Disc (R) 260 Solid Disc"

2024-05-01 T4 Driveshafts

#35916 from Scotty B White · Rule change · TB 24-05 (2024-05 Fastrack)

In GCR Section 9.1.9.2.D.4.b., add the following:
"6. T2-T3- Driveshafts may be replaced with alternative materials ie. carbon fiber, aluminum, steel. Two-piece driveshafts may
be replaced with one-piece units. If non-OEM driveshaft is used, add 25 lbs."

2024-05-01 T4 GCR ERROR - letter not properly applied to GCR

#35999 from Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must remain
stock: transmission differential unless specified below. Retractable hardtop option permitted but must be disabled from moving
action and positively fastened. 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). 29mm (f) 16mm (r) sway bars
allowed. 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). Up to 500lb front and 300lb rear
springs allowed. Mazda Motorsports Header part #0000-06-5410 allowed. Mazda tower brace 0000-04-5626 allowed."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2024-06-01 T4 Allow OEM Front Spoiler 06-08 Miata in T4

#35941 from David Mead · Rule change · TB 24-06 (2024-06 Fastrack)

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), add to Notes the following: "Front
spoiler permitted (NF51-V4-900F)."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2024-06-01 T4 T4 Mustang Weight Reduction In T4 Spec

#36051 from Scotty B White · Rule change · TB 24-06 (2024-06 Fastrack)

Lines, Ford Mustang V6 (05-10), change as follows:
Weight: "3275 3225"
Notes: "14” Brembo Brake Kit#M-2300-S permitted."

2024-06-01 T4 R53 Mini Cooper S spec line request In

#36056 from Manvinder Singh · Rule change · TB 24-06 (2024-06 Fastrack)

T4 Spec Lines, Mini Cooper S (02-04), add to Notes the following:
"Milltek exhaust manifold #SSXM459 allowed. 25mm rear sway bar allowed."
T4 Spec Lines, Mini Cooper S (05-06), add to Notes the following:
"Milltek exhaust manifold #SSXM459 allowed. 25mm rear sway bar allowed."

2024-07-01 T4 Mustang T2/T3

#35877 from Scotty B White · Rule change · TB 24-07 (2024-07 Fastrack)

In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), add to Notes as follows:
"Track/Performance Package parts permitted."
In T2 Spec Lines, Ford Mustang GT 5.0L (2018-), add to Notes as follows:
"Track/Performance Package parts permitted."
In T3 Spec Lines, Ford Mustang V6 (15-17), change Notes as follows:
"Track/Performance package allowed."

2024-07-01 T4 Homologation of car to T4

#36030 from Patrick E Morgan · Rule change · TB 24-07 (2024-07 Fastrack)

In T4 Spec Lines, Mercedes C300 4Matic (2008-2011), classify as follows:

A specification table follows in the original; it is not shown here.

2024-07-01 T4 T2-T4 Driveshaft Mistake...?

#36050 from Scotty B White · Rule change · TB 24-07 (2024-07 Fastrack)

In GCR Section 9.1.9.2.D.4.b.6., remove as follows:
"If non-OEM driveshaft is used, add 25 lbs."
In T2 Spec Lines, Ford Mustang V6 (11-14), change Notes as follows:
"Driveshaft from Alternate metallic driveshaft is allowed."
In T2 Spec Lines, Ford Mustang Boss 302 (12-13), change Notes as follows:
"Alternate metallic driveshaft is allowed."
In T2 Spec Lines, Ford Mustang GT 5.0L (11-14)ki, change Notes as follows:
"Alternate metallic driveshaft is allowed."

2024-07-01 T4 MINI Cooper S Spec Lines Corrections.

#36086 from David Oliveira · Rule change · TB 24-07 (2024-07 Fastrack)

In T4 Spec Lines, Mini Cooper S (02-04), delete spec line in its entirety.
In T4 Spec Lines, Mini Cooper S (05-06), change Model as follows:
"Mini Cooper S R53 (0205-06)"
In T4 Spec Lines, Mini Cooper S (07-13), change Model and Notes as follows:
"Mini Cooper S R56 (07-13)"
Notes: "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 6 768 415 (R)33 53 6 768 418. May de-camber

Applies to Mini Cooper S on this page: Trenton Kramer

2024-07-01 T4 Allow Removal of Sound Tubes

#36130 from Coyote Black · Rule change · TB 24-07 (2024-07 Fastrack)

In GCR Section 9.1.9.2.D.1.b., add the following:
"2. OEM intake- Chambers, resonators and acoustic devices may be removed, provided; that their ports are located
prior to any required restrictor, their ports are completely sealed, and that the part serves no other purpose."

2024-07-01 T4 B8/8.5 Audi S4 T3 and T2

#36195 from Brian Leib · Rule change · TB 24-07 (2024-07 Fastrack)

In T3 Spec Lines, Classify Audi S4 (2000-2002) as follows and allow the T2 spec line to expire.

A specification table follows in the original; it is not shown here.

2024-08-01 T4 T4 Camaro V6 weight reduction

#36232 from Ted Warning · Rule change · TB 24-08 (2024-08 Fastrack)

In T4 Spec Lines, Chevrolet Camaro V-6 (96-02), change weight as follows:
"3250 3150"

2024-08-01 T4 BOP adjustment for ND MX5s

#36345 from Touring Committee · Rule change · TB 24-08 (2024-08 Fastrack)

In T4 Spec Lines, change Weight (lbs) as follows:
Mazda MX-5 Miata/Club (16-18): "2700 2650"
Mazda MX5 Miata/Club/ RF (19-24): "2800 2750"

2024-11-01 T4 Bop Request 06-11 Honda Civic Si

#37013 from Mathew Milford · Rule change · TB 24-11 (2024-11 Fastrack)

In T4 Spec Lines, Honda Civic Si (06-11), add to Notes the following:
"LSD is permitted according to category rules."

2024-12-01 T4 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft

#36484 from David Mead · Rule change · TB 24-12 (2024-12 Fastrack)

In T2 Spec Lines, change Notes as follows:
Ford Mustang V6 (11-14): "Alternate driveshaft is allowed."
Ford Mustang Boss 302 (12-13): "Alternate driveshaft is allowed."
Ford Mustang GT 5.0L (11-14): "Alternate driveshaft is allowed."
Ford Mustang GT 5.0L (15-17): "Alternate driveshaft is allowed."
Ford Mustang GT 5.0L (2018-): "Alternate driveshaft is allowed. Springs up to 800#/in front and rear permitted. Alternate
metallic driveshaft permitted."
Ford Mustang Coupe GT & Shelby GT 4.6L (05-10): "Alternate driveshaft is allowed."

2024-12-01 T4 R53 Mini Cooper S Weight Reduction Request

#36612 from Manvinder Singh · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, Mini Cooper S R53 (02-06), add to Notes as follows:
"Alta 15% Pulley #AMPENG20X allowed."

Applies to Mini Cooper S on this page: Trenton Kramer

2024-12-01 T4 Allowable Wheel Offset

#36855 from Robert Maples · Rule change · TB 24-12 (2024-12 Fastrack)

In GCR Section 9.1.9.2.D.7. Wheels and Tires, change as follows:
"a. Wheels
1. Any type wheel suitable for competition may be used, provided:
a. Any wheel not exceeding the specified diameter and rim width on the vehicle’s specification line may be used. Each wheel,
measured without weights, must weigh at least 15 lbs.
b. Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude
beyond the fender opening when viewed from 9.1.9.2.Touring (T2-T4) Category Specifications GCR - 660 the top perpendicular
to the ground, unless specified differently on the individual spec line for that car. To determine compliance the vehicle should be

2024-12-01 T4 Fuel Emissions Components

#37076 from Derrick Ambrose · Rule change · TB 24-12 (2024-12 Fastrack)

In GCR, Section 9.1.9.2.D.1.c. add the following:
"5. Removal of ancillary fuel tank equipment charcoal canisters, emissions valves, and sensors allowed for OEM or aftermarket
fuel cell installations."

2024-12-01 T4 2019-2024 Mazda 3 for T4

#37077 from Derrick Ambrose · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, classify Mazda 3 (19-24), as follows:

A specification table follows in the original; it is not shown here.

2024-12-01 T4 fix brake wording

#37129 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In GCR, Section, 9.1.9.2.D.6. Brakes, change as follows:
"a. Components
1. The make and material of brake pads and linings may be changed.
2. Brake fluid may be substituted with any brake fluid.
3. Brake rotor dust shields may be removed or replaced to accommodate brake ducts.
4. Flexible rubber brake lines may be replaced with Teflon lined, metal braided hoses.
5. Any brake ducts are permitted, but they must serve no other purpose. Fender liners may be modified solely for routing and
attachment of brake ducts. Duct intake openings may be created by the opening of 2 sections up to 14.5 square inches each in

2024-12-01 T4 Evaporative emissions systems

#37130 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In GCR, Section, 9.1.9.2.D.1.c., add the following:
"5. Removal of ancillary fuel tank equipment; charcoal canisters, emissions valves, and sensors allowed for OEM or aftermarket
fuel cell installations."

2024-12-01 T4 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision

#37140 from Chris Braunlich · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, add the following to Notes:
Mazda RX-8 Base/R3/Sport/ GT (04-12): "Transmission kit # 0000-02-5700 permitted.
Mazda MX-5 / Club Model (06-15): "Transmission kit # 0000-02-5700 permitted."
In T3 Spec Lines, add the following to Notes:
Mazda MX-5 / Club Model (06-15): "Transmission kit # 0000-02-5700 permitted."
Mazda RX-8 Base/R3/Sport/ GT (04-12): "Transmission kit # 0000-02-5700 permitted."

2024-12-01 T4 Move Spec Boxster to T4

#37158 from Rob Piekarczyk · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, classify Porsche Spec Boxster, as follows:

A specification table follows in the original; it is not shown here.

2024-12-01 T4 3.7 Mustangs to T4

#37188 from Scotty B White · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, classify Ford Mustang V6 (05-14), as follows:

A specification table follows in the original; it is not shown here.

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2024-12-01 T4 BMW 320i Spec Line

#37204 from chi ho · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, BMW 320i (14-15), change Notes as follows:
"**This Spec line will expire 12/31/24, Please submit to appeal** Turner Motorsports intercooler #024703TMS02 allowed."

2024-12-01 T4 MX5 2006-2015 NC Help

#37221 from Richard Mooney · Rule change · TB 24-12 (2024-12 Fastrack)

Thank you for your letter. Please see changes in letter #37281 in current Fastrack.

2024-12-01 T4 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual

#37224 from Timothy Nash · Rule change · TB 24-12 (2024-12 Fastrack)

In T3 Spec Lines, classify Cadillac CTS (02-07) as follows:

2024-12-01 T4 Civic SI in T4

#37248 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, Honda Civic Si (06-11), change as follows:
Required Restrictor: "55mm flat plate restrictor required."
Min Weight: "2950 2900"
Notes: "The following items must remain stock: transmission differential - unless specified below. 55mm flat plate restrictor
required. LSD IS PERMITTED ACCORDING TO CATEGORY RULES"

2024-12-01 T4 2006-2015 T4 NC Mx5 spec line

#37278 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows:
"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), 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. Allow Mazda header part numbers 0000-06-

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2024-12-01 T4 ND MX-5 wheel allowance

#37279 from Josh Smith · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Wheel Size as follows:
"17 x 7.5"

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2024-12-01 T4 T4 BOP

#37281 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change as follows:
Required Restrictor: "60mm 59mm"
Weight: "3125 3200"
In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change weight as follows:
"2600 2550"

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2024-12-01 T4 Allow 7.5

#37286 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Wheel Size as follows:
"17 x 7.5"

2025-01-01 T4 2016-2018 Mazda Miata MX5

#37085 from Nic Piekarski · Rule change · TB 25-01 (2025-01 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Min Weight as follows:
"2650 2575"
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), add to Notes the following:
"Mazda header 0000-06-5410 allowed."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2025-01-01 T4 Remove spec lines that have expired

#37269 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

In T2, Effective 1/1/2025, delete for following Spec Lines in their entirety:
"Acura TL SHAWD (10-13)
Audi S4 (12-14)
Audi S5 (13-14)
Audi TT RS (2018-)
Cadillac ATS-V (16-17)
Cadillac CTS-V (06-07)
Chevrolet Camaro SS (98-02)

2025-02-01 T4 Ford Mustang V6 (05-14)

#37516 from Touring Committee · Rule change · TB 25-02 (2025-02 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-14), change as follows:
Final drive: "3.45"
Notes: "GT/CS front bumper cover #AR3Z-17D957-BA, allowed if used with front fascia."

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2025-02-01 T4 Request to Classify Club Spec in Appropriate Touring Classes

#37523 from Andrew Benagh · Rule change · TB 25-02 (2025-02 Fastrack)

In T3 Spec Lines, classify Ford SCCA Club Spec Mustang (CSM) as follows:

A specification table follows in the original; it is not shown here.

2025-05-01 T4 Correct Ring and Pinion Ratio to T3, Sorry I Mean T4 3.7 V6 Stang

#38041 from David Mead · Rule change · TB 25-05 (2025-05 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-14), add to Notes the following:
"GT 8.8 rear axle assembly allowed. 3.45 or 3.55 final drive ratio allowed. 7.5 rear axle assembly with 3.45:1 final drive allowed."

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2025-05-01 T4 T4 Mustang

#38058 from Scotty B White · Rule change · TB 25-05 (2025-05 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-14), add to Notes as follows:
"OEM style rear deck spoiler similar to Laguna/CS packages permitted.”

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2025-06-01 T4 T4 Mustang

#38059 from Scotty B White · Rule change · TB 25-06 (2025-06 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-14), change as follows:
Final Drive: "3.45 or 3.31"
"Weight: "3400 3300"

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2025-06-01 T4 SSC tire allowance

#38216 from Benjamin Bunk · Rule change · TB 25-06 (2025-06 Fastrack)

In T4 Spec Lines, Scion FR-S Solo Spec Coupe (13-16), change Notes as follows:
"Any 200TW 225/45/17 or 215/45/17 DOT tire permitted."
In T4 Spec Lines, Subaru BRZ Solo® Spec Coupe (13-16), change Notes as follows:
"Any 200TW 225/45/17 or 215/45/17 DOT tire permitted."

2025-07-01 T4 Allow B-Spec cars to run in T4

#38439 from Derrick Ambrose · Rule change · TB 25-07 (2025-07 Fastrack)

In GCR, Section 9.1.9.2, Touring car eligibility, change as follows:
"Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific allowances
permitted. In addition T2-T4 cars may race one class up in touring classes above their specification line class as long as they are a
legal T2-T4 car and conform to their specification line allowances as classified. Cars conforming to B-Spec or C-Spec rules are
permitted to compete in Touring 4."

2025-08-01 T4 Incorrect Touring Heading

#38451 from Terry Hanushek · Rule change · TB 25-08 (2025-08 Fastrack)

In T2-T4 Spec Lines, change Table Header as follows:
"T2 ET"

2025-11-01 T4 02-06 Mini Cooper Gear Ratios

#38966 from Trenton Kramer · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, Mini Cooper S R53 (02-06), change Gear Ratios as follows:
"12.79, 7.79, 5.65, 4.62, 3.83, 3.13 or overall- 11.42, 7.18, 5.39, 4.40, 3.65, 2.96"

Applies to Mini Cooper S on this page: Trenton Kramer

2025-11-01 T4 Reinstatement of the 2005-2010 Cobalt into T4

#38987 from Tim Little · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, classify Chevrolet Cobalt SS, Sport Coupe (06-10) as follows:

A specification table follows in the original; it is not shown here.

2025-11-01 T4 Request to Classify Mercedes C230K

#39080 from Patrick Morgan · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, classify Mercedes C230 Kompressor (2002-2005) as follows:

A specification table follows in the original; it is not shown here.

2025-11-01 T4 ND Gearset Request for T4

#39166 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), add to Notes the following:
"Gear kit Kit PT#- 0000-02-6100."
In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following:
"Gear kit Kit PT#- 0000-02-6100."
In T3 Spec Lines, Mazda MX-5 Miata (16-18), add to Notes the following:
"Gear kit Kit PT#- 0000-02-6100."
In T3 Spec Lines, Mazda MX-5 Global Cup Miata (2016-2021) ND1, ND, add to Notes the following:
"Gear kit Kit PT#- 0000-02-6100."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2025-11-01 T4 E&O wheel size on ND

#39168 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Wheel Size (in.) as follows:
"17 x 7.5"

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2025-11-01 T4 ND Spec Lines Wrong PT#'s

#39170 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must remain
stock: transmission differential unless specified below. Retractable hardtop option permitted but must be disabled from moving
action and positively fastened. 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). 29mm (f) 16mm (r) sway bars
allowed. 3rd and 4th gear may be replaced with the following parts- (0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-02,
0000-02-5804-01). Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front springs
#0000-04-9700-08, springs up to 500lb front and 300lb rear allowed. Mazda tower brace 0000-04-5626 allowed. Mazda header

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2025-11-01 T4 Touring 4 Post-Runoffs BOP Adjustments and Changes

#39251 from Touring Committee · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, Acura RSX/ RSX Type-S (02-06), change Restrictor as follows:
"55mm FPR"
In T4 Spec Lines, Acura TSX (2004-2008), change Restrictor as follows:
"47mm FPR 52mm FPR"
In T4 Spec Lines, BMW Z4 2.5L (03-05) , change Weight as follows:
"3050 2950"
In T4 Spec, BMW 320i (14-15), remove this spec line in its entirety.
In T4 Spec Lines, BMW 323 (98-00), change as follows:

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

Applies to Toyota 86 on this page: Chip Herr

2025-12-01 T4 Classing 1995-99 Dodge Neon SOHC

#39285 from Preston Obremski · Rule change · TB 25-12 (2025-12 Fastrack)

In T4 Spec Lines, classify Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99) as follows:

A specification table follows in the original; it is not shown here.

2026-01-01 T4 Alternate Placement of Fuse Panel and Electronics Request

#39370 from Aaron Stehly · Rule change · TB 26-01 (2026-01 Fastrack)

In GCR, Section 9.1.9.2.D.9.d, add the following:
"8. Under-dash electronics including computers, modules and fuse boxes may be relocated so they can be easily accessed after
roll cage installation."

2026-01-01 T4 Clarify T4 Brake Rotor Allowance

#39503 from David Mead · Rule change · TB 26-01 (2026-01 Fastrack)

In GCR, Section 9.1.9.2.D.6.a.6., change as follows:
"In T2-Performance alternative rotors, including 2 piece rotors are permitted. Rotors must be within 5% of OE diameter or a
maximum diameter of 360mm.
In T3- Performance alternative rotors, including 2 piece rotors are permitted with a maximum diameter of 360mm.
T4- Performance alternative 1-piece rotors are permitted but rotors must meet the sizes listed in the spec line. Spec lines
showing alternate brake kits are also permitted to use 1-piece performance alternative rotors of the same size."

2026-02-01 T4 T4 and T3 Feedback

#39230 from Tim Myers · Rule change · TB 26-02 (2026-02 Fastrack)

In T4 Spec Lines, remove Ford Mustang V6 (05-14) in its entirety.

2026-02-01 T4 T4 Mustang 4.0

#39489 from Scotty B White · Rule change · TB 26-02 (2026-02 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-10), change as follows:
Tire: "245 255"
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:
28mm permitted. Aftermarket Shocks conforming to T4 rules allowed. Panhard bar, part # BAR-M-4264-A permitted, or any pan
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

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2026-02-01 T4 Allow Alt Bushing Material in Toe Links

#39607 from David Mead · Rule change · TB 26-02 (2026-02 Fastrack)

In GCR, Section 9.1.9.D.5.a.1., change as follows:
"T2-T4: A maximum of 3.5 degrees of negative camber is allowed on front and rear suspensions. Spec line part(s) may not be
modified to increase caster and camber. Strut suspensions may adjust camber and caster by the use of eccentric bushings,
eccentric bolts (crash bolts) at the strut-to-spindle, and/or by use of slotted adjustment plates at the top of the strut mounting
plate. If upper strut slotted adjustment plates are used, they shall be located on existing chassis structure, utilizing the
unmodified manufacturer’s original bolt holes and may not serve as reinforcement for that structure. Slotted adjustment plates
(strut camber plates) may incorporate a single spherical bearing (spherical bushing) and a ball thrust bearing per strut tower. On
other forms of suspension, camber and caster adjustment may be achieved by the use of shims and/or eccentric

2026-03-01 T4 ND MX-5 Spec Line Rewrite Request

#39802 from Josh Smith · Rule change · TB 26-03 (2026-03 Fastrack)

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change as follows:
Weight: "2750 2650"
Notes: "Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must
remain stock: transmission differential unless specified below. Retractable hardtop option permitted but must be disabled from
moving action and positively fastened. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette,
including Mazda hardtop part #0000-07-5902-ND. 29mm (f) 16mm (r) sway bars allowed. 3rd and 4th gear may be replaced with
the following parts- (0000-02- 5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5804-01). Suspension package permitted
with a 100 lbs. weight increase that includes the following parts: front springs #0000-04-9700-08, s Suspension

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2026-03-01 T4 4.0 Mustang spec line cleanup

#39831 from David Mead · Rule change · TB 26-03 (2026-03 Fastrack)

In T4 Spec Lines, Ford Mustang V6 (05-10), change Notes as follows:
"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:
28mm permitted. Aftermarket Shocks conforming to T4 rules allowed. Panhard bar, part # BAR-M-4264-A permitted or any pan
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

Applies to Ford Mustang on this page: Scotty B White, Matthew Miller

2026-04-01 T4 16-24 ND MX5 T4

#39934 from Touring Committee · Rule change · TB 26-04 (2026-04 Fastrack)

In T4 Spec Lines, Mazda MX-5 Miata/ Club (16-18), change Notes as follows:
"29mm 32mm(f) 16mm (r) sway bars allowed."
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Notes as follows:
"29mm 32mm(f) 16mm (r) sway bars allowed."

Applies to Mazda MX-5 on this page: Ethan Barker, Madin Workman, Ayden Rose, Marc Cefalo, RIchard Mooney, Kevin Fryer, Connor Thomas, William Snyder

2026-05-01 T4 2003 Honda Civic Si Classification

#39999 from Milos Milivojevic · Rule change · TB 26-05 (2026-05 Fastrack)

In T4 Spec Lines, classify Honda Civic SI (02-03) as follows:

A specification table follows in the original; it is not shown here.