Porterfield R4 Brake Pads have been used on our own racecars for over 7 years.  With extensive use in both our GT3 and World Challenge Touring Cars, these pads have proven to be a great success. *These pads are best for track use only*
Porterfield pads feature:
- Carbon kevlar friction compound
- Provide excellent stopping power
- Extremely rotor friendly
- Excellent pedal feel 
- Immediate response to braking input
- Super high friction level through all temps
- Low wear rate