From the SCCA class rules:
Brakes
a. Backing plates and dirt shields may be ventilated or removed.
b. Brake lines may be replaced with steel lines or Teflon lined
metal braided hose.
c. Cars with antilock braking systems must have the system
disabled as specified in GCR 9.3 Brakes.
d. Parking brake mechanisms, and actuating components may be
removed.
e. Brake pads and brake fluid are unrestricted
f. 2001 and newer cars must use the 255mm(F) and 252mm(R)
brakes. The larger brakes 269.5mm(F) and 267.9mm(R) are
not permitted.
