Heavy Duty 6-Pad Clutch Kit

The ACT SB10-HDG6 is a heavy-duty race sprung 6-pad clutch kit designed for high-performance applications. It features ACT's popular Heavy Duty pressure plate, engineered with an exclusive diaphragm design to increase clamp load, reduce deflection, and maximize clutch life. This pressure plate undergoes a four-stage, heat-treating process for enhanced performance and reliability, with precision cover stampings ensuring rigidity and consistency. This kit includes a 6-pad spring-centered race disc made from ceramic friction materials, chosen for its high heat tolerance and maximum performance. The spring-center construction effectively damps torsional vibrations and resists failure even under harsh conditions. The engagement with this disc is described as harsher, facilitating faster shifting, and it is recommended for larger clutch sizes to absorb more heat. Included in the kit is ACT's patented Monoloc, a one-piece component that replaces the standard two-piece wedge collar and wire ring found in pull-type clutches. Monoloc offers uniform loading on the bearing and pressure plate, ensuring proper alignment regardless of driver influence or vehicle modifications. Its hardened Chrome-moly steel construction ensures long-term service. All ACT clutch assemblies are computer spin balanced to within .25 oz-in for smooth high RPM operation, offering superior balance compared to stock clutches. The ACT SB10-HDG6 clutch kit is recommended for high horsepower street or race use. It offers moderate friction life, extended release mechanism life, and a light to moderate pedal effort with aggressive engagement. The kit is compatible with various Subaru WRX STI models from 2004 through 2021, as well as certain Subaru Legacy GT spec.B models.