Frozen Rotors 1958 FZR Rear Brake Rotor - Cryogenically Treated For Maximum Durability Frozen Rotors are Ultra-Premium brake rotors that are Precision Machined for Smooth Brake Operation. QC100 venting matches the OE cooling vanes to manage brake temperature and prevent noise and limit vibration. Exceeds OE specifications. Cryogenically treated to resist cracking, warping and fading Survives twice as long as standard rotors and will save thousands in brake repair costs Frozen Rotors are the Ideal choice for high-usage and high-performance vehicles that demand reliability and safety Treated with a rust preventative coating on the hat and vane surfaces for a long lasting clean look