The R1 Concepts drilled and slotted brake rotor for 1969–1983 Porsche 911, rear left, is a black-finished replacement rotor that restores the pad contact surface at the rear wheel. It features drilled and slotted machining specific to that position and is intended for use when replacing a worn rotor during brake service; inspect pads and mounting components as part of the installation.
R1 69-83 Porsche 911 Rear Left Drilled & Slotted Black Brake Rotor