ACT NS1-HDSS Heavy Duty Performance Street Sprung Clutch Kit

NS1-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. 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 Performance Street discs feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs have reduced marcel for faster shift action to complement ACT pressure plates, with increased strength and reliability. HD/Perf Street Sprung Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle; Longer friction life, extended by ACT's exclusive diaphragm design; Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade; Recommended for street and race use; 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

• "Excellence in Performance", backed by the best one-year warranty in the industry!

The ACT NS1-HDSS Heavy Duty Performance Street Sprung Clutch Kit combines ACT’s popular Heavy Duty pressure plate with a Performance Street sprung disc for dependable engagement and improved clutch durability. Designed for street and race use, this kit provides light to moderate pedal effort, smooth positive engagement, and performance suited to vehicles ranging from factory applications to mildly modified builds.

The ACT Heavy Duty pressure plate uses an exclusive diaphragm design to increase clamp load, reduce deflection, and help maximize clutch life. Each diaphragm undergoes a four-stage heat-treating process for consistent performance, while precision cover stampings improve rigidity and operating consistency. The Performance Street disc uses premium organic friction material with high copper content for enhanced heat transfer, reduced fade, and reliable friction performance.

A steel-backed lining increases burst strength and durability, while reduced marcel supports faster shift action and a positive pedal response. The ACT NS1-HDSS kit is carefully engineered, precisely assembled, accurately balanced, 100% clamp-load tested, and dynamically computer balanced for smooth reliability at high engine speeds. The sprung hub design helps provide refined street manners with OE to mild gear rattle characteristics. ACT backs this clutch kit with a one-year warranty.

Product Specifications & Technical Data

• Brand: ACT
• Part Number: NS1-HDSS
• Product Type: Heavy Duty performance street sprung clutch kit
• Pressure Plate Type: Heavy Duty diaphragm pressure plate
• Disc Material: Premium organic friction material with high copper content
• Disc Construction: Steel-backed lining with sprung hub design
• Intended Use: Street and race applications
• Balance and Testing: 100% clamp-load tested and dynamically computer balanced

What’s Included

• ACT Heavy Duty pressure plate
• ACT Performance Street sprung clutch disc

Verify vehicle-specific fitment before ordering. Application compatibility should be confirmed using the vehicle year, make, model, engine, transmission, and any drivetrain modifications.

Features:

• Heavy Duty Diaphragm Design: Increases clamp load, reduces deflection, and helps extend clutch service life.
• Four-Stage Heat-Treated Diaphragm: Supports consistent pressure plate performance under demanding operating conditions.
• Premium Organic Street Disc: High-copper friction material improves heat transfer, heat tolerance, and resistance to fade.
• Fast, Reliable Engagement: Reduced marcel, steel-backed lining, sprung hub construction, and computer balancing provide smooth engagement, durability, and dependable high-RPM operation.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1