Buy Today ACT Heavy Duty Sprung 6-Puck Disc Clutch 2004-2021 STI / 2007-2009 Legacy GT Spec B

Description

The ACT SB10-HDG6 kit features ACT’s most popular Heavy Duty pressure plate, designed to deliver increased clamp load, reduced deflection, and maximum clutch life. Each diaphragm spring is treated through ACT’s exclusive four-stage heat-treating process to ensure consistent performance under high stress. Precision cover stampings provide added rigidity and reliability for long-term durability.

At the heart of this kit is ACT’s 6-pad, spring-centered race disc, engineered to damp torsional vibrations and resist failure under demanding driving conditions. Reinforced spring retainers with wraparound windows and thicker stampings enhance strength and reduce stress concentrations. This configuration offers aggressive engagement and faster shifting, ideal for high-horsepower street or race applications.

The included Monoloc upgrade replaces the traditional two-piece wedge collar and wire ring used in pull-type clutches. Built from hardened chrome-moly steel, the Monoloc ensures uniform bearing load, improved alignment, and extended release mechanism life — even under aggressive driving or modified setups.

Specs

• Torque Capacity: 668 ft-lbs (88% over OE)
• Disc Material: Ceramic
• Disc Diameter: 9.4 in / 240 mm
• Input Shaft Diameter: 1 in
• Pressure Plate Type: Heavy Duty
• Weight: 18.5 lbs

Performance Characteristics

• Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle, confident high-RPM shifting
• Life: Extended clutch and release mechanism life thanks to ACT’s diaphragm design and Monoloc construction
• Quality: Precision-engineered and balanced with premium ceramic friction materials for maximum heat tolerance and durability
• Recommended Use: High-horsepower street or race vehicles
• ACT Difference: Every kit is 100% clamp-load tested and dynamically computer balanced for smooth, reliable performance — featuring ACT’s patented Monoloc for superior release consistency

Note: Legacy GT Spec.B models will need to use the STI flywheel in order to use this clutch.