The R1 Concepts drilled-and-slotted rear left brake rotor for 1990–1997 Audi S4 is a black-finished replacement rotor listed for that application. The drilled-and-slotted face pairs an aggressive look with the rotor surface geometry expected by the braking system, offering a practical replacement solution to renew worn rear rotors and maintain correct pad engagement on the stated S4 model years.
R1 90-97 Audi S4 Rear Left Drilled & Slotted Black Brake Rotor