SpeedFactory Racing Ultra Lightweight Rear Staging Brake Rotor, Sold Each - SF-RTA-3040-V2This is the same rotor used in our AWD FWD rear staging brake kit and our FWD rear trailing arm kit, now available for purchase individually. These rotors are also compatible with the discontinued KS TUNED Lightweight Rear Trailing Arm kits. The SFR Ultra Lightweight steel rear staging rotor is 1 2 the weight of stock rotors and the design features 11 teeth windows that allows use of a Hall effect sensor to read rear wheel speed. SPECIAL WARNING: This