All Cobalt Friction XR-Series Racing Brake Pads feature true 100% "no-bedding required" to achieve full frictional performance, unlike most traditional race pads which require very specific bedding instructions for proper function. Unmatched friction vs. temperature stability and consistency. Additionally, Cobalt Friction materials exhibit unmatched disc finish and life as compared to any competing racing friction.
Cobalt XR4 is a medium torque compound sharing a similar application basis as our popular XR3 material, but at lower overall friction levels. With a slightly rising torque curve at low to moderate line pressures, transitioning to a virtually flat profile at higher line pressures and temperatures, the XR4 is primarily a rear-axle compound for vehicles under 2800lbs. However, the excellent cold performance, friction stability and consistency of the XR4 also make it a class-leading autocross compound on vehicles up to 3200lbs.