StopTech Sport Performance Brake Pads (309 Series) are designed for high-performance street driving and light track use. The formula provides improved pedal feel and high-temperature fade resistance. This rear brake pad set (Part No. 309.09190) includes: 4 Rear Brake Pads (Full Axle Set), Lab-Tested Shims for noise reduction. Perfect for BMW M-series owners seeking enhanced stopping power without excessive dust or noise.