PolyMatrix "Q" Compound Characteristics:Enhanced friction ceramic formula features the lowest noise and dust properties available from a performance compound pad. Improved friction over OE replacement pad compounds with smooth engagement, long service life, increased fade resistance, and quick recovery time. Best compound for specialized application aluminum rotors, and compatible with all vented iron rotors. Applications:Sprint cars with aluminum rotors. Disc brake conversions on street rods, muscle cars, custom show cars, and all moderate performance applications where low noise and dust are important. Wilwood Pad Compounds: Wilwood brake pad compounds are the results of three decades of experience and continual development to provide optimized braking and driver feel for all types of motor sport and competition applications. This selection guide is intended to provide general characteristics and applications for each compound. On-track testing and driver evaluation however, will always remain the determining factor to final pad selection. Pad Selection Tips: Temperature range and overall friction value are the primary considerations for pad selection. The pads must be capable of maintaining the proper amount of friction for stopping power within the temperatures that will be realized on the track during the event. Then, overall wear rate must be considered. For most asphalt and road race applications, compounds in the high temperature ranges over 1000?F range are usually necessary. Dirt track, drag race, and street performance applications usually operate at temperatures between 500? and 1000?F. Keep in mind that these are general ranges, and not absolute values. Many factors and unforeseen influences can affect brake temperatures. The best indicator for pad selection will always be on track performance. If pad fade (friction loss) due to overheating occurs, then improved cooling, a heavier rotor, or a higher temperature range pad may all become necessary. Wilwood brake pads are the result of a never ending development process that dates back to the company's origin in 1977. The goal has always been to provide the highest level of performance for all categories of competition and performance driving. For nearly three decades, Wilwood has been deeply involved in all types of motor sports. This involvement includes more than just hands-on experience from expert design and development engineers. The Wilwood development team includes manufacturing specialists, field trained technical application staff, and a broad structured network of championship car builders, parts distributors, crew chiefs, and race teams just like you. Their involvement and expertise have played an integral role in the development and production of Wilwood brake pads. This network can be found at work and competing at tracks around the world on any given weekend. Over the years, Wilwood has developed an extensive information base that has fueled development of the world's broadest based line of high performance disc brake products. Throughout this time, facts and data, not casual observation and opinion, have drawn conclusions that neither a single pad compound or compound type can effectively satisfy all drivers in all conditions. To meet the requirements of such a broad range of racing and sport driving applications, Wilwood has developed a highly diversified selection of compounds and pads. The available selections provide incremental changes in friction values, temperature operating range, as well as other characteristics, that are capable of satisfying the stopping requirements of nearly any motor sport application. Proof is evident in the wide spread use of the PolyMatrix family of compounds and several other specialized application materials.Pit Stop USA offers Wilwood Polymatrix "Q" Compound Brake Pads - Fits Forged Superlite, Superlite 6 15Q-6829K at low everyday prices. Be sure to check out all of our products from Wilwood Engineering including Wilwood Engineering Forged Superlite and SL 6 (7420) and Wilwood Engineering Polymatrix Brake Pads.