RacingBrake 2176-351 Drilled and Slotted Finish Rear Two-Piece Brake Rotor for Corvette C6 Z06 - Pair Lightweight; save 4 pounds per rotor versus stock Save on replacement costs by just replacing the disc instead of the entire rotor Patented center mount design, hat is mounted at the center of the disc using alternating tabs from both faces Discs are made with alloyed, gray iron and heat treated