For high-performance and heavy-duty street conditions, the Porterfield R4-S compound remains a top performer among street and performance brake pads. With a friction level of up to .41, it is an exceptionally fast-stopping brake pad that provides an impressive increase in stopping ability with minimal pedal effort. It is suited to prolonged everyday street driving while remaining capable of enduring severe use without fade, and it is also rotor-friendly.
Porterfield has taken extensive measures to ensure that the R4-S compound has the lowest possible noise and dust levels, far below OEM equipment or other high-performance brake materials. The R4-S compound has an overall win in the Baja 1000 and offers superb stopping power under heavy use. It is suitable for occasional autocross, solo events, off-road events and rallies, while remaining a clean and quiet everyday high-performance brake pad.
Axle set of 4 pieces.