The R1 Concepts Geo-Carbon drilled and slotted rotor is a replacement rotor offering a Geo-Carbon finish and drilled-and-slotted braking surfaces for front or rear use as specified. It is listed for 1997–2008 Audi A4 (Mexico) front left and rear left positions and intended as the correct replacement rotor when renewing worn or damaged rotors on those applications.
R1 97-08 Audi A4 (Mexico) Front Left/Rear Left Drilled & Slotted Geo-Carbon Rotor