The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a replacement front-left rotor for 2004–2009 Audi S4 models. Its drilled and slotted braking face combined with a Geo-Carbon surface aims to assist in clearing pad deposits and shedding water. Supplied for the front-left position, this rotor is specified to suit the listed S4 applications and routine rotor replacement needs.
R1 04-09 Audi S4 Front Left Drilled & Slotted Geo-Carbon Rotor