PORTERFIELD BRAKE PADS

Since 1986 Porterfield has earned a reputation for manufacturing and supplying Competition Brake Pads and Brake products to the performance racing industry. A close working relationship with leading professional teams in motorsports has led to the development of one of the finest Racing Brake Pads ever produced. Our engineering and in-house manufacturing capabilities are known in the industry for a rapid response in developing special items to solve an immediate need, often overnight! An extensive inventory and knowledgeable sales staff has assured quick order processing and on-time deliveries.

A uniquely engineered composite brake pad, which exceeds the proficiency of any other racing pad. This precision design combines Kevlar, Carbon and an array of other high performance materials to make a better brake pad. R-4 Carbon Kevlar is a high friction material with a .485 friction coefficient designed especially for motorsports. R-4 Carbon Kevlar pads have a unique ceramic heat shield integrally molded and designed specifically for high temperature applications to minimize heat transfer

R.4 Carbon Kevlar Race Pad
An outstanding race pad, the original R-4 Carbon Kevlar has proven to be versatile and a superior performing product.

R.4 S: Street High-performance & Limited Competition
The high performance street pad of choice. Very high friction level even at cold temperatures. No dust or squeal. Great for limited competition, motocrosses, driver schools, & solo events. This is the fastest stopping road pad available.

R-4 E: Endurance Racing Pads with Longer Life
This endurance pad, with special formulation for long races, runs cool and wears longer than our regular R-4. Great for extended time events

ROTOR FRIENDLY
LIGHT PEDAL EFFORT
SUPER HIGH FRICTION LEVEL THROUGH ALL TEMPS
LOW WEAR RATE

R-4 CARBON KEVLAR BEDDING IN PROCEDURE

All disc pad materials require a period of bedding in before they are subjected to severe braking under racing conditions. Because of the special characteristics of R-4 disc pads a very special bedding procedure is necessary to ensure that they will achieve their full potential. When a satisfactory contact has been made between pad and disc the brakes should be used progressively harder until a falling off in performance is felt (brake fade). This is best done by continually braking from medium speed until, at the end of one such stop, a substantial increase in effort is needed to reduce the speed of the car. Brake parts will be very hot by this time and it is very important to now allow the pads to cool and recover, preferably with the vehicle still on the move. If the above advice is followed, R-4 disc brake pads will give long and fade free braking, coupled with good performance and disc condition.

Is there a bedding in procedure for other pads? Yes. The Carbon Kevlar pads have bedding in procedure. Make light to medium deceleration stops to slowly heat up disc. This must be done slowly to avoid thermal shock to the disc. Make a series of hard stops, allow to cool slowly.
What is the difference between the R-4 and the R-4S? The difference between the R-4 and R-4S pad is the R-4 has a higher friction level and will withstand higher temperatures than the R-4S. Also the R-4 was designed for racing use, if driven on the street you may experience some dust and or squeal. The R-4S is designed for street and limited track use. It is a serious high performance highway pad with high friction levels and is designed for driver's school, and light track events. R-4S was designed to produce no squeal and less dust than OE pads.
Will the Carbon Kevlar pads eat my rotors? No. Carbon Kevlar pads are very rotor friendly. What makes Carbon Kevlar different from others? Carbon Kevlar pads are different because they are rotor friendly, work well hot or cold, have very high friction level and exhibit no fade, and on some compounds offer little to no dust or squeal.

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