The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a replacement brake rotor intended for rear-left use on 1994–2004 Ford Mustang models. This drilled-and-slotted Geo-Carbon rotor is described by its product name; confirm rear-left compatibility with your Mustang year and consider matching the opposite side to maintain balanced braking when replacing rotors.
R1 94-04 Ford Mustang Rear Left Drilled & Slotted Geo-Carbon Rotor