ACT Heavy-Duty Clutch Kits are high quality products guaranteeing superior functionality and efficiency. These products provide a clamp load increase up to 50 percent, increasing torque capacity.

Key Features:

• Spline Size (Inches): 1
• Disc Type: Race Disc
• Spline Count: 22
• Product Weight (lbs.): 10.5
• Torque Capacity (ft./lbs.): 320
• Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
• Moderate friction life, extended by ACT's exclusive diaphragm design
• Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
• Recommended for high horsepower street or race use
• 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

ST1-HDG4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4-pad spring-centered race disc features a spring-center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. With the 4-pad spring-centered race disc, engagement is harsher, but shifting is faster. ACT's 4-pad spring-centered race disc is well-suited for smaller disc sizes in smaller engines.
Since 1994, Advanced Clutch Technology has specialized in performance clutches and flywheels. All products are made from the highest quality materials and then necessarily tested to ensure they perform to the customers' expectations.

Vehicle Fitment Table

FAQ

Will this fit my vehicle?
Please verify your year, make, model, position, and any fitment notes using the compatibility table above before purchase.

What part number is this?
The listed part number is ST1-HDG4.

Is this product designed for direct replacement?
Yes. This product is intended to match the compatible vehicle applications listed in the fitment table.

Should I confirm fitment before ordering?
Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering.

Common Searches

• HD/Race Sprung 4 Pad for Saturn SC
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