ACT HC10-HDSS Heavy Duty Performance Street Sprung Clutch Kit for 2017-2018 Honda Civic Si

HC10-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 HC10-HDSS Heavy Duty Performance Street Sprung Clutch Kit is engineered for the 2017-2018 Honda Civic Si and combines ACT’s Heavy Duty pressure plate with a Performance Street sprung disc. Designed for street and race applications, this clutch kit delivers reliable power transfer, smooth positive engagement, and light to moderate pedal effort. It is an excellent upgrade for drivers seeking improved clutch durability and performance over the original equipment setup.

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 pressure plate is 100% clamp-load tested and dynamically computer balanced to support smooth, reliable operation at high engine speeds.

The Performance Street sprung disc uses premium organic friction materials with high copper content to improve heat transfer and help reduce fade. Steel-backed linings provide greater burst strength and durability, while reduced marcel promotes faster shift action and complements the Heavy Duty pressure plate. This carefully engineered and accurately balanced kit provides extended friction life, dependable engagement, and OE to mild gear rattle characteristics. ACT backs the HC10-HDSS with a one-year warranty.

Product Specifications and Technical Data

• Brand: ACT
• Part Number: HC10-HDSS
• Clutch Type: Heavy Duty pressure plate with Performance Street sprung disc
• Disc Material: Premium organic friction material with high copper content
• Disc Design: Sprung hub with reduced marcel
• Application: Street and race use
• Engagement: Smooth, positive engagement with light to moderate pedal effort
• Balancing and Testing: 100% clamp-load tested and dynamically computer balanced

What's Included

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

Fitment includes select 2017 and 2018 Honda Civic Si applications. Verify vehicle configuration and transmission details before ordering. This product is intended for automotive use and may carry a California Proposition 65 warning.

Features:

• Heavy Duty Diaphragm Design: Increases clamp load, reduces deflection, and helps maximize clutch life.
• Four-Stage Heat-Treated Diaphragm: Supports consistent pressure plate performance and long-term durability.
• Premium Organic Street Disc: High-copper friction material improves heat transfer and resistance to fade.
• Sprung Disc with Reduced Marcel: Provides smooth engagement, faster shift action, and reliable street performance.

Fitments:
2017 Honda Civic EX-T
2017 Honda Civic LX
2017 Honda Civic Si
2017 Honda Civic Sport
2017 Honda Civic Sport Touring
2018 Honda Accord Sport
2018 Honda Civic EX
2018 Honda Civic EX-L
2018 Honda Civic EX-T
2018 Honda Civic LX
2018 Honda Civic Si
2018 Honda Civic Sport
2018 Honda Civic Touring
2019 Honda Accord Sport
2019 Honda Civic LX
2019 Honda Civic Si
2019 Honda Civic Sport
2020 Honda Accord Sport
2020 Honda Civic LX
2020 Honda Civic Si
2020 Honda Civic Sport
2020 Honda Civic Sport Touring
2021 Honda Civic Sport
2021 Honda Civic Sport Touring
2022 Honda Civic Si
2022 Honda Civic Sport Touring
2023 Acura Integra A-Spec
2023 Honda Civic Si
2023 Honda Civic Sport Touring
2024 Acura Integra A-Spec
2024 Honda Civic Si
2024 Honda Civic Sport Touring
2025 Acura Integra A-Spec
2025 Honda Civic Si
2026 Acura Integra A-Spec
2026 Honda Civic Si

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