StopTech 127.33127R Power Slot fits Audi 09-10 A4/A4 Quattro / 08-10 A5 / 10 S4 Rear Right Drilled & Slotted Rotor. The unique cross-drilling and slotting aids with heat and brake dust dispersal, prevents glazing of the pads, adds bite and improves wet and dry braking performance.
