The R1 Concepts drilled-and-slotted black brake rotor is a replacement rotor for 1979-1998 Buick Riviera applications, specified for the left-side position applicable to front or rear depending on the listing. The rotor is described as drilled and slotted with a black finish. This overview preserves the explicit year range and model while noting the left-side fitment called out in the product description.
R1 79-98 Buick Riviera Front/Rear Left Drilled & Slotted Black Brake Rotor