StopTech 127.44157R Sport Rear Right Drilled/Slotted Disc Brake Rotor is a 1-piece direct replacement brake rotor for factory brake systems and stock calipers that looks great behind your wheels and offers significantly improved braking performance. The unique cross-drilling and slotting aids with heat and brake dust dispersal, prevents glazing of the pads, adds bite and improves wet and dry braking performance. Built to last, the black e-coating provides protection from corrosion and the high carbon metallurgy (in most applications) offers quieter operation, better crack resistance and increased performance.