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."