StopTech SportStop Slotted & Drilled Brake Rotor (Left Front). Designed for high-performance braking, this rotor features a cross-drilled and slotted surface to improve heat dissipation and eliminate brake fade. The part is finished with a black e-coating on the hub and vanes for superior corrosion protection. This is a single component. Kit Components: 1 x StopTech 127.44129L Brake Rotor. Disc Diameter: 319mm. Lug Count: 6.