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Our Brake Pads
R4
R-4 - Designed specifically for heavy duty motorsports, the R-4 brake pad was our first and original Carbon Kevlar
brake pad. Being able to maintain an average of .50 friction level within a very wide temperature range gives the R-4 pad
astounding versatility and makes it very suitable for a wide array of various track conditions. Another inherent characteristic
of our Carbon Kevlar material is how quickly the pads warm up to race temperature which is quite helpful during restarts,
and when track time is limited. Optimum R-4 operating temperatures are 450°F and above. When used with cast iron and
steel alloy rotor, the R-4 compound requires minimal bed-in period. Note: This is a full race compound, dust and squeal will
occur. It is not designed for street use.
brake pad. Being able to maintain an average of .50 friction level within a very wide temperature range gives the R-4 pad
astounding versatility and makes it very suitable for a wide array of various track conditions. Another inherent characteristic
of our Carbon Kevlar material is how quickly the pads warm up to race temperature which is quite helpful during restarts,
and when track time is limited. Optimum R-4 operating temperatures are 450°F and above. When used with cast iron and
steel alloy rotor, the R-4 compound requires minimal bed-in period. Note: This is a full race compound, dust and squeal will
occur. It is not designed for street use.
Please note:
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
R4-E
R4-E - A Carbon Kevlar compound made to last a bit longer than the original R-4 compound. The R4-E pads have
an average friction level of .460 and perform best at temperatures averaging over 600°F. The R4-E compound is
designed to endure higher prolonged temperatures and still have pad life as long or longer than Porterfield R-4.
This pad is great for club enduro events and applications where temperatures are at their maximum. Note: This is a
full race compound, dust and squeal will occur. It is not designed for street use.
an average friction level of .460 and perform best at temperatures averaging over 600°F. The R4-E compound is
designed to endure higher prolonged temperatures and still have pad life as long or longer than Porterfield R-4.
This pad is great for club enduro events and applications where temperatures are at their maximum. Note: This is a
full race compound, dust and squeal will occur. It is not designed for street use.
Please note:
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
R4-1
R4-1 - Developed and tested in the vintage racing community the R4-1 gives an average friction level of .56 with peak
levels up to .600. Having tremendous stopping power, the R4-1 pad material can reach upward of .5 friction level when
pad temperature is a very low 200°F. Drivers can still have a high friction brake pad without the worry of the pad becoming
too cold to be effective when the car is driven only moderately. For use when pad temperatures are under 600°F and peak
temperatures are not over 1000°F. Widely used on Vintage GT and formula cars, the R4-1 has gained great popularity
as an excellent auto-cross, off-road and rally-cross pad material. Note: This is a full race compound, dust and squeal will
occur. It is not designed for street use.
levels up to .600. Having tremendous stopping power, the R4-1 pad material can reach upward of .5 friction level when
pad temperature is a very low 200°F. Drivers can still have a high friction brake pad without the worry of the pad becoming
too cold to be effective when the car is driven only moderately. For use when pad temperatures are under 600°F and peak
temperatures are not over 1000°F. Widely used on Vintage GT and formula cars, the R4-1 has gained great popularity
as an excellent auto-cross, off-road and rally-cross pad material. Note: This is a full race compound, dust and squeal will
occur. It is not designed for street use.
Please note:
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
R4-S
R4-S - For high performance and heavy duty street conditions, the R4-S compound remains a top performer in the realm of street/performance brake pads. Perfect for everyday street driving while also being capable of enduring the most severe street use without fade. It is rotor friendly, low dust and squeal. We have gone to great lengths to ensure it is the absolute lowest noise and dust levels produced for a performance street compound. With this pad compound you will increase the friction level of your pads resulting in quicker stops. The pads will last longer and be more quiet and produce less dust than your current OEM pad.
Please note:
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
All Porterfield brake pads are solely developed for Motorsport use. They are intended for race use only. They have not been developed for use on public roads and must not, under any circumstances, be used on public roads.
