"Excellence in Performance", backed by the best one-year warranty in the industry! P/PL MaXX Xtreme Heavy to very heavy pedal effort, positive engagement; Available disc life extended by ACT's exclusive diaphragm design; Carefully engineered for improved durability, precisely assembled, accurately balanced; Recommended for race use only; 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability MB010XX pressure plate uses exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All ACT diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's MaXX Xtreme pressure plates increase clamp load by 70 to 150 percent. MaXX Xtreme pressure plates are recommended for use with a race disc.