The R1 Concepts slotted brake rotor for 2005–2006 Pontiac GTO (front left) is a black-finished replacement rotor intended for the left front braking position on those model years. It specifies axle and side to make selection easier when replacing a front rotor. The slotted face and black finish correspond with typical service-style replacement rotors.
R1 05-06 Pontiac GTO Front Left Slotted Black Brake Rotor