ACT Heavy Duty Race Sprung 4 Pad Clutch Kit w/Flywheel 2006-2025 WRX / 2005-2012 Legacy GT / 2006-2008 Forester XT

The SB11-HDG4 kit combines ACT’s Heavy Duty pressure plate with a 4-pad spring-centered race disc for high-performance street or race use. The diaphragm-style pressure plate increases clamp load, reduces deflection, and maximizes clutch life. The 4-pad spring-centered disc dampens torsional vibrations for quieter operation while resisting failure under harsh conditions. Engagement is aggressive, and the 4-pad design is ideal for smaller disc sizes in smaller engines.

Specs

• Torque Capacity: 574 ft/lbs (86% over OE)
• Disc Material: Ceramic
• Disc Diameter: 9.4 in / 240 mm
• Input Shaft Diameter: 1 in
• Pressure Plate Type: Heavy Duty
• Product Weight: 28.5 lbs
• Flywheel Type: Streetlite

Performance Characteristics

• Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
• Life: Moderate friction life, extended by ACT’s exclusive diaphragm design
• Quality: Precisely assembled, accurately balanced, with ceramic friction materials for high heat tolerance and maximum performance
• Recommended Use: High horsepower street or race use
• ACT Difference: 100% clamp load tested, dynamically balanced for smooth high RPM reliability