Rear Slotted Brake Rotor Kit 2005 + Mustangs. Rear slotted brake rotor kit matches the ROUSH High Performance Front Brake Kit (Item #401599), but are intended for the rear of your Mustang. These rotors will work with the factory calipers. To ensure proper clearance, the Roush 18" X 10" Wheels are recommended. Set comes with two rotors and all needed hardware for installation.