Slot and Drilled Friction Surface Allows Gasses and Dust to Escape from Between the Pad and Rotor for Improved Braking Performance and a More Consistent Pedal, Enhanced Vane Structure and Premium Materials for Superior Cooling and Durability, Premium, Mill Balanced, Direct Replacement Rotor, Chamfered Cross Drilled Holes to Minimize Stress Cracking, Designed for use with standard brake systems.