ACT ZM5-HDSS Heavy Duty Performance Street Sprung Clutch Kit for Mazda MX-5 Miata

ZM5-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 ZM5-HDSS Heavy Duty Performance Street Sprung Clutch Kit combines a high-clamp-load pressure plate with a performance street disc for dependable operation in daily-driven, modified, and weekend race vehicles. Designed for select Mazda MX-5 Miata applications, this kit delivers smooth engagement, faster shift action, and improved friction durability while maintaining light to moderate pedal effort.

ACT's Heavy Duty pressure plate uses an exclusive diaphragm design to increase clamp load, reduce deflection, and help maximize clutch life. The diaphragm undergoes a four-stage heat-treating process for consistent performance, while the precision cover stamping provides improved rigidity and repeatable operation. The included Performance Street sprung disc uses premium organic friction material with high copper content for improved heat transfer, along with steel-backed linings for enhanced burst strength and durability. Reduced marcel supports quicker shifts while preserving smooth, positive engagement and minimizing gear rattle.

The ACT ZM5-HDSS is carefully engineered, precisely assembled, accurately balanced, and 100% clamp-load tested. Its design supports reliable operation at high engine speeds and is recommended for street and race use. This clutch kit is engineered for select 2007–2014 Mazda MX-5 Miata applications; verify the vehicle, model year, transmission, and original equipment configuration before ordering. ACT backs its performance clutch products with a one-year warranty.

Product Specifications & Technical Data

• Brand: ACT
• Part Number: ZM5-HDSS
• Clutch Type: Heavy Duty performance street sprung clutch kit
• Pressure Plate: Heavy Duty diaphragm design
• Disc Material: Premium organic friction material with high copper content
• Disc Construction: Steel-backed lining for increased strength
• Balancing: Dynamically computer balanced
• Recommended Use: Street and race applications

What's Included

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

Fitment: Select 2007–2014 Mazda MX-5 Miata models, including model years 2007, 2008, 2009, 2010, 2011, 2012, and 2014. Confirm exact fitment before installation.

Features:

• Heavy Duty Diaphragm Design: Increases clamp load, reduces deflection, and helps extend clutch service life.
• Premium Organic Friction Material: High copper content improves heat transfer and helps reduce fade under demanding use.
• Steel-Backed Disc Lining: Provides greater burst strength and durability for reliable street and race performance.
• Fast, Smooth Engagement: Reduced marcel supports quicker shift action while maintaining light to moderate pedal effort and positive engagement.

Fitments:
2006 Mazda MX-5 Miata Base
2006 Mazda MX-5 Miata Club Spec
2006 Mazda MX-5 Miata Touring
2007 Mazda MX-5 Miata Sport
2007 Mazda MX-5 Miata SV
2008 Mazda MX-5 Miata Sport
2008 Mazda MX-5 Miata SV
2009 Mazda MX-5 Miata Sport
2009 Mazda MX-5 Miata SV
2010 Mazda MX-5 Miata Sport
2011 Mazda MX-5 Miata Sport
2012 Mazda MX-5 Miata Sport
2013 Mazda MX-5 Miata Sport
2014 Mazda MX-5 Miata Sport
2015 Mazda MX-5 Miata Sport

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