The R1 Concepts slotted brake rotor for 2004 Pontiac GTO (rear left) is a black-finished replacement rotor intended for the left rear braking position on that model year. It states axle and side to help shoppers select the correct part for rotor service or replacement. The slotted face and black coating align with common aftermarket rotor styling.
R1 04-04 Pontiac GTO Rear Left Slotted Black Brake Rotor