For high-performance and heavy-duty street conditions, the Porterfield R4-S compound remains a top performer among street and performance brake pads. The R4-S compound provides a friction level of up to .41, delivering extremely fast stopping performance and an impressive increase in stopping ability with minimal pedal effort. It is suitable for prolonged everyday street driving while remaining capable of enduring severe use without fade. It is also rotor-friendly.
Great measures have been taken to give the R4-S compound the lowest possible noise and dust levels, far below O.E.M. equipment or other high-performance brake materials. The R4-S compound has achieved an overall win in the Baja 1000 and is available for most models of cars, trucks and SUVs. It delivers superb stopping power under heavy use and is suitable for occasional autocrossing, solo events, off-road events and rallies. It is designed as a clean and quiet everyday high-performance driving brake pad.
The sensor is not included.
