Porterfield R4-1 Carbon Kevlar Racing Brake Pad GD 557 R4-1

Porterfield Carbon Kevlar R4-1 Racing Brake Pad:  GD 557 R4-1 

Porterfield R4-1 Carbon Kevlar Racing Brake Pads were developed and tested in the Vintage Racing community. Because of the high coeffecant 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 GD 557 R4-1 applications are AC Cobra. Alfa Romeo 2600. Aston Martin DB5, DB6, DBS, Lagonda, Vantage and Volante. De Tomaso Mangusta. Delorean DMC-12. Ferrari 206 Dino GT, 275 GT, 330 GT, 330 GTC, 330 GTS, 365, 365 GT4 2+2, 365 Daytona GTB and 365 Daytona GTS. Fiat 1500 Spider, 1600 Spider and Dino 2000. Jaguar 420, XJ12, XJ6, XJR-S, XJ-S, XJ-SC, XKE and XK-E. Lamborghini 3500 GT, 400 GT, 400 GT 2+2, Espada, Islero, Jarama GT, Jarama GTS and Miura. Maserati 3500 GT, 5000 GT, Bora, Ghibli, Indy, Khamsin, Merak, Mexico, Mistral, 4000 GT, Quattroporte, Quattroporte III and Sebring rear brakes..