The R1 Concepts drilled and slotted brake rotor for 1977–1988 Porsche 924, rear left, is a black-finished replacement rotor that restores the braking surface where pads meet the rotor. It features drilled and slotted machining specific to the rear left position and is intended for use when replacing a worn rotor during brake service; inspect pads and related components during installation.
R1 77-88 Porsche 924 Rear Left Drilled & Slotted Black Brake Rotor