Porterfield R4-1 Carbon Kevlar Racing Brake Pad AP 394 R4-1

Porterfield Carbon Kevlar R4-1 Racing Brake Pad:  AP 394 R4-1 

Porterfield R4-1 Carbon Kevlar Racing Brake Pads were developed and tested in the Vintage Racing community. Because of the high coeffecient of friction (?) at low temperatures, these are fast becoming the Autocross brake pad of choice. A peak ? of .600 the R4-1 pad can reach close to ? of .500 at temperatures as low as 200?F. The R4-1 brake pads are widely used on Vintage GT and Formula car where pad temps are under 600?F and peak temps are below 1,000?F. This is also a good Rally-Cross brake pad.

Typical AP 394 R4-1 applications are Audi 100 Quattro, 200 Turbo and 200 Turbo Quattro. BMW E34 525i, 525iT, 530i, 535i and 540i. E32 730i, 735i, 735iL, 740i, 740iL and 750iL. E36 M3. E46 M3. E28 M5. Z3 M Roadster. Jaguar XJ12, XJ6 Sovereign, XJ6 Vanden Plas, XJ8, XJ8 Vanden Plas, XJR, XJR-S Supercharged V8 and XK..