Heavy Duty Street Clutch Kit

The ACT SB5-HDSS Heavy Duty Performance Street Sprung Clutch Kit is engineered to provide enhanced torque capacity and reliable engagement for demanding street and race applications. This kit includes ACT's robust Heavy Duty pressure plate, known for its exclusive diaphragm design that increases clamp load, reduces deflection, and maximizes clutch lifespan. The pressure plate undergoes a four-stage heat-treating process for superior performance and is precision-stamped for rigidity and consistency. Complementing the pressure plate is ACT's popular street disc, which utilizes premium organic friction materials with a high copper content for improved heat dissipation and a steel-backed lining for increased burst strength and durability. The disc features a reduced marcel for quicker shift action, enhancing the overall performance feel. Each ACT clutch assembly is 100% clamp load tested and dynamically computer balanced to within .25 oz-in, significantly tighter than stock clutch tolerances (.50 oz-in), ensuring smooth operation even at high RPMs. When installing this clutch kit, expect a moderate increase in pedal effort, typically ranging from 15-40% for the Heavy Duty models. A break-in period of 300-500 miles with mild engagement is recommended for the organic street discs to ensure optimal friction surface conditioning and longevity. This break-in should avoid overheating to prevent glazing or hot spots. This ACT SB5-HDSS clutch kit is compatible with a range of Subaru models, including various years of the WRX, Legacy GT, Outback XT, and Forester XT, as well as the Saab 9-2X Aero. However, it is important to note specific fitment exclusions: it will not fit vehicles with VIN J-806877, and is not compatible with revised OEM components introduced in 2018. Some sources also indicate compatibility with 2000-2002 Chevrolet Cavalier and Pontiac Sunfire, though primary fitment targets Subaru vehicles.