ACT NX1-HDSS Heavy Duty Performance Street Sprung Clutch Kit

NX1-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 NX1-HDSS Heavy Duty Performance Street Sprung Clutch Kit combines ACT's proven Heavy Duty pressure plate with a Performance Street sprung disc for dependable street performance and select racing applications. Designed for drivers seeking stronger clutch engagement without an excessively demanding pedal, this kit delivers light to moderate pedal effort, smooth positive engagement, and reliable power transfer for OE to mildly modified drivetrains.

The Heavy Duty pressure plate uses ACT's exclusive diaphragm design to increase clamp load, reduce deflection, and help extend clutch life. Each diaphragm undergoes a four-stage heat-treating process for consistent performance, while precision cover stampings provide added rigidity and uniform operation. The included Performance Street disc uses premium organic friction material with high copper content to improve heat transfer and help resist fade. Steel-backed lining enhances burst strength and durability, while reduced marcel supports quicker shift action.

Every ACT NX1-HDSS assembly is carefully engineered, precisely assembled, accurately balanced, 100% clamp-load tested, and dynamically computer balanced for smooth, reliable operation at high RPM. It is recommended for street and race use where longer friction life, improved heat tolerance, and dependable engagement are important. The kit is designed for select Nissan applications, including the 1984–1986 Nissan 720 and 1995–1997 Nissan 240SX; verify transmission, engine, and application details before ordering. ACT backs this clutch kit with its industry-leading one-year warranty.

Product Specifications & Technical Data

• Brand: ACT
• Part Number: NX1-HDSS
• Clutch Type: Heavy Duty pressure plate with Performance Street sprung disc
• Disc Material: Premium organic friction material with high copper content
• Engagement: Smooth, positive engagement with reduced marcel
• Pedal Effort: Light to moderate
• Recommended Use: Street and race applications
• Quality Testing: 100% clamp-load tested and dynamically computer balanced

What's Included

• ACT Heavy Duty pressure plate
• ACT Performance Street sprung clutch disc
• Clutch kit components required for the specified application

Features:

• Heavy Duty Pressure Plate: ACT's exclusive diaphragm design increases clamp load, reduces deflection, and helps maximize clutch life.
• Performance Street Sprung Disc: Premium organic friction material with high copper content improves heat transfer, heat tolerance, and fade resistance.
• Smooth Street Engagement: Reduced marcel and carefully matched components provide faster shift action with light to moderate pedal effort.
• Balanced High-RPM Reliability: Precision assembly, 100% clamp-load testing, and dynamic computer balancing support consistent operation for street and race use.

Fitments:
1975 Nissan 280Z Base
1975 Nissan 620 Base
1976 Nissan 280Z Base
1976 Nissan 620 Base
1977 Nissan 280Z Base
1977 Nissan 620 Base
1978 Nissan 280Z Base
1978 Nissan 620 Base
1979 Nissan 280ZX Base
1979 Nissan 620 Base
1980 Nissan 280ZX Base
1980 Nissan 280ZX GL
1980 Nissan 720 Base
1980 Nissan 720 Deluxe
1981 Nissan 280ZX Base
1981 Nissan 280ZX GL
1981 Nissan 720 Base
1981 Nissan 720 Deluxe
1982 Nissan 280ZX Base
1982 Nissan 720 Base
1982 Nissan 720 Deluxe
1982 Nissan Maxima GL
1983 Nissan 280ZX Base
1983 Nissan 720 Base
1983 Nissan 720 Deluxe
1983 Nissan Maxima GL
1984 Nissan 720 Deluxe
1984 Nissan Maxima GL
1985 Nissan 720 Deluxe
1986 Nissan 720 Deluxe
1989 Nissan 240SX SE
1989 Nissan 240SX XE
1990 Nissan 240SX SE
1990 Nissan 240SX XE
1990 Nissan Axxess SE
1990 Nissan Axxess XE
1995 Nissan 240SX Base
1995 Nissan 240SX SE
1996 Nissan 240SX Base
1996 Nissan 240SX SE
1997 Nissan 240SX Base
1997 Nissan 240SX LE
1997 Nissan 240SX SE
1998 Nissan 240SX Base
1998 Nissan 240SX LE
1998 Nissan 240SX SE

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