ACT Heavy Duty HD-M Race Sprung 6-Pad Clutch Kit for Select Subaru 2004-2021 (SB10-HDG6)

Fits select 2004-2021 Subaru WRX STI and Legacy GT spec.B.

The ACT SB10-HDG6 Heavy Duty Race Sprung 6-Pad Clutch Kit is engineered for high-performance applications that demand faster shifting and high heat capacity. This kit centers on ACT’s popular Heavy Duty pressure plate, which uses an exclusive diaphragm design to increase clamp load and reduce deflection. Every diaphragm undergoes a specialized four-stage heat-treating process to ensure consistent performance under the stresses of racing.

• 6-Pad Race Disc: Features a spring-centered construction to damp torsional vibrations and resist failure. The ceramic 6-pad design absorbs more heat and allows for faster shifts, though engagement is significantly more aggressive than stock.
• Monoloc Wedge Collar: Includes a one-piece, hardened Chrome-moly steel upgrade to the standard two-piece wedge collar. This ensures uniform loading on the bearing and prevents separation in pull-type clutches.
• Heavy Duty Pressure Plate: Precision cover stampings provide the rigidity and consistency needed for high-stress environments.
• Durable Construction: Spring retainers utilize wraparound windows and thicker stampings to reduce stress concentrations and increase overall reliability.

Technical Specifications:

• Manufacturer Part Number: SB10-HDG6
• Pressure Plate Type: Heavy Duty
• Disc Style: 6-Pad Spring-Centered Race Disc
• Material: Ceramic / Chrome-moly Steel
• Clutch Type: Pull-type