PolyMatrix "H" compound is about as close to a "run it everywhere" pad material that could possibly exist. Drivers are calling them the most driveable pads they have ever run. "H" compound is a high friction, long wearing material that is capable of withstanding the extreme sustained high temperatures found on hard braking short tracks and road courses. It is also well suited to intermediate length and super speedway applications where positive, but controllable initial engagement at lower temperatures is preferred for trail braking and "touch" and go race conditions. PolyMatrix "H" compound produces high friction values right from the start. Then, as heat builds, it exhibits a very moderate rise to produce the highest friction values available from materials used with iron or steel rotors. Two key characteristics of this material are the softer initial bite and the progressive increase in stopping power as pedal pressures and temperatures continue to rise. The soft initial bite reduces the nose-dive tendencies as the car begins the transition into deceleration. When the car does not nose over abruptly, the driver can be more consistent and in better control of each corner entry. "H" is then easily modulated with pedal pressure to increase or decrease the stopping power throughout the entire temperature range. The smooth engagement qualities and consistent cold to hot bite of "H" make it simple to maintain front to rear bias settings using the same pad material at both ends of the car.Pit Stop USA offers Wilwood Polymatrix "H" Compound Brake Pads - Fits GP320 15H-8596K at low everyday prices. Be sure to check out all of our products from Wilwood Engineering including Wilwood Engineering GP320 Brake Pads (6211) and Wilwood Engineering Polymatrix Brake Pads.