SB10-HDG6 Heavy Duty Race Clutch Kit

The ACT SB10-HDG6 Heavy Duty Race Clutch Kit is engineered for demanding street and race applications, offering a significant upgrade over stock. The core of this kit is ACT's most popular Heavy Duty pressure plate, distinguished by its exclusive diaphragm design. This design increases clamp load, minimizes deflection, and is subjected to a rigorous four-stage heat-treating process for maximum durability and consistent performance. The included 6-pad spring-centered race disc is designed to effectively damp torsional vibrations and withstand harsh operating conditions. Its spring-center construction, combined with reinforced spring retainers, enhances strength and reliability. This clutch kit provides aggressive engagement and quicker shifts, making it suitable for users prioritizing rapid gear changes. The ACT Monoloc system is a key component, acting as a direct replacement for standard wedge collar and wire ring setups in pull-type clutches. Its hardened Chrome-moly steel construction ensures uniform loading on the bearing and pressure plate for optimal alignment, even under significant driver influence or vehicle modifications. For organic street discs, a break-in period of 300-500 miles with mild engagement is recommended, while ACT race discs typically require only a few hard slips. Proper break-in is crucial to prevent overheating, hot spots, and glazing. The SB10-HDG6 is designed for a 15-40% increase in pedal effort compared to OEM and offers a torque capacity of 668 ft-lbs, an 88% increase over stock. It is compatible with various Subaru Impreza WRX STI and Legacy GT spec.B models from 2002 to 2021, featuring the 2.5L H4 and 2.0L F4 Turbocharged engines.