The R1 Concepts slotted brake rotor for Audi S4 (1990–1997) is a front-left replacement finished in black. Provided for the front-left wheel position on the listed years, this slotted rotor is specified to match the stated S4 application and offers the slotted rotor configuration and black finish described in the source.
R1 90-97 Audi S4 Front Left Slotted Black Brake Rotor