Porterfield R4-1 Carbon Kevlar Racing Brake Pad AP 682 R4-1

Porterfield Carbon Kevlar R4-1 Racing Brake Pad:  AP 682 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 682 R4-1 applications are Audi RS4 B5, TT R32 and TT Quattro. Bentley Arnage Red Label, Arnage R, Arnage RL and Arnage T. BMW Z8 and E38 750iL. Chrysler Crossfire SRT-6. Mercedes Benz (R170) SLK32 AMG. (W202) C43 AMG. (W208) CLK55 AMG. (W210) E430 and E55 AMG. (W211) E500. (W220) S430 and S500. VW Golf, R32..