PowerStop Autospecialty direct-replacement rear rotor for 2004–2009 Audi S4 is made to OE fit and performance standards. Built to tight tolerances for DTV and runout, the rotor includes a cross-hatched surface to assist pad break-in, matches original weight and vane count, is dynamically mill-balanced, and installs without modification for dependable rear braking as a sold-individually unit.
Power Stop 04-09 Audi S4 Rear Autospecialty Brake Rotor