Power Stop 10-15 BMW 550i GT Rear Evolution Drilled & Slotted Rotors - Pair - EBR1221XPR. $399.38. QTY Improved Wet Weather Braking. Get More Pad Bite And Increased Safety. Tru-Cast Precision Machined For Exact OE Fit. Power Stop Evolution Rear Rotor Pair PowerStop Brakes EBR1221XPR Disc Brake Rotor Set Brake Rotors Power Stop Evolution Performance Brake Rotors are designed for use on street and day track applications. These exceptional brake rotors come with a special drilled and slotted design that improves cooling and offers protection from gas and dust Decreased Brake Fade Pulsation And Wear. Improve Stopping Distance With More Pad Bite. EBR1221XPR Powerstop 2-Wheel Set Brake Discs Rear for Slots keep a clear contact patch between the pad and the rotor , Increased braking performance