The R1 Concepts drilled black brake rotor is a replacement front-left rotor for 1976–1984 Buick I-Mark models. This drilled rotor in a black finish is supplied for the front left position and intended to replace a worn rotor on the specified years, restoring the braking surface and providing a vehicle-specific replacement option matching the application and position described in the source text.
R1 76-84 Buick I-Mark Front Left Drilled Black Brake Rotor