Porterfield R4-S High Performance Street Brake Pads for BMW 5-series (e39, e34, e28) - including M5

R4-S High Performance Street and Autocross:
For high performance and heavy-duty street conditions. Perfect for prolonged everyday street use while also being capable of tolerating the most severe street use without any fade. Rotor friendly of course. The R4-S friction level will give you an impressive increase in stopping ability with very minimum pedal effort. R4-S compound has the absolute lowest noise and dust levels, far below OEM equipment or any other high performance brake material. Good for autocrossing, some drivers' schools, and rallies.