ACT Heavy Duty Sprung 6-Puck Disc Clutch 02-05 WRX / 04-05 Forester XT / 07-09 Legacy GT Spec. B

The ACT SB9-HDG6 kit features ACT’s proven Heavy Duty pressure plate, engineered for increased clamp load, reduced deflection, and maximum clutch life. Each diaphragm spring undergoes ACT’s exclusive four-stage heat-treating process for consistent performance and durability, while precision cover stampings ensure rigidity and reliability.

The 6-pad, spring-centered race disc uses a spring-center construction that effectively dampens torsional vibrations and resists failure under high-stress conditions. Reinforced spring retainers with wraparound windows and thicker stampings improve strength and longevity. This configuration provides faster shifting and improved heat dissipation, though with a more aggressive engagement feel — ideal for high-power street or race setups.

The included Monoloc upgrade replaces the standard two-piece wedge collar and wire ring found in pull-type clutches. Its hardened chrome-moly steel construction and carefully tuned retaining ring deliver uniform bearing load and improved alignment under demanding conditions, greatly extending the life of the release mechanism.

Specs

• Torque Capacity: 555 ft-lbs (63% over OE)
• Disc Material: Ceramic
• Disc Diameter: 9 in / 228 mm
• Input Shaft: 1 in (24 spline)
• Pressure Plate Type: Heavy Duty
• Weight: 16.7 lbs

Performance Characteristics

• Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle, confident shifting under load
• Life: Moderate friction life extended by ACT’s diaphragm design and Monoloc mechanism durability
• Quality: Precisely engineered and balanced, using premium ceramic friction materials for superior heat tolerance and performance
• Recommended Use: High-horsepower street or race applications
• ACT Difference: Every unit is 100% clamp load tested and dynamically balanced for smooth, reliable operation at high RPM — now featuring ACT’s patented Monoloc for enhanced release performance