PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes - no matter where or how they use their vehicle. If you are an experienced track day enthusiast running R-Compound tires, or compete in a spec racing series such as Spec Miata and want the ultimate performance brake pads, then look no further than PowerStop Track Day Spec High-Performance Brake Kit. This kit comes complete with PowerStop Track Day Spec brake pads and Autospecialty rotors, taking the guesswork out of purchasing brakes for track use. As the official brake supplier of Bondurant Racing School, Track Day Spec brake pads are data-driven and tested to provide extreme fade resistance, low thermal conductivity, and consistent pedal feel. These platform-specific brake pads have an excellent coefficient of friction and resist fade during the rigors of your favorite track day event or competitive spec racing series. The Autospecialty brake rotors are 100% dynamic mill-balanced and provide a direct fit solution for your vehicle. When you are on the track, have confidence and control at every corner with PowerStop Track Day Spec High-Performance Brake Kit. Power Stop - Rear Track Day Spec High-Performance Brake Pad and Rotor Kit Rear: 2008-2010 BMW 135i;