9.3.9.3. Wheels shall be 14 by 6 inches or 15 by 7 inches, shall weigh a minimum of thirteen (13) pounds, any brand, unless specified in these regulations.
9.3.10.
Brakes
9.3.10.1. The make and material of brake pads may be replaced, unless specified in these regulations.
9.3.10.2. Brake rotors may be replaced provided they are match OEM specifications for the E30 application.
9.3.10.2.1. Vented front rotors are permitted.
9.3.10.3. Cross drilling, grooving, and slotting of rotors is permitted.
9.3.10.4. Rotors may be cryogenically treated.
9.3.10.5. Removal of dust shields (backing plates) is permitted.
9.3.10.6. Brake fluid is free.
9.3.10.7. Flexible rubber brake lines may be replaced with Teflon lined, metal braided hoses.
9.3.10.8. Metal brake lines may be substituted.
9.3.10.9. Parking brake and associated mechanisms, including the parking brake console, may be removed.
9.3.13.7. Ducting to the brakes is permitted, and two openings in the front valance to allow the passage of up to a three (3) inch diameter duct leading to each front brake are permitted for this purpose.
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