The ACT ZM4-HDSS Heavy Duty Performance Street Sprung Clutch Kit pairs ACT's most popular Heavy Duty pressure plate with ACT's most popular street disc. The Heavy Duty pressure plate uses an exclusive diaphragm design to increase clamp load and reduce deflection, with every diaphragm undergoing ACT's four-stage heat-treating process and precision cover stampings for rigidity and consistency. The Performance Street disc uses premium organic friction material with high copper content for improved heat transfer and a steel-backed lining for greater burst strength and durability, with reduced marcel for faster shift action alongside the Heavy Duty pressure plate.
WarrantyInstallation Instructions
Specifications:
- Pressure Plate: ACT Heavy Duty, four-stage heat-treated diaphragm
- Disc: Performance Street, organic friction material, high copper content
- Disc Backing: Steel-backed lining, reduced marcel for faster shift action
- Includes: Pressure plate, street disc, alignment tool (pilot bearing and release bearing included on some applications)
- Recommended Use: Street and performance driving
- Part Number: ZM4-HDSS
Vehicle Applications:
- 2006 Mazda MX-5 Miata Sport
- 2006 Mazda MX-5 Miata Grand Touring
- 2007 Mazda MX-5 Miata Touring
- 2007 Mazda MX-5 Miata Grand Touring
- 2008 Mazda MX-5 Miata Touring
- 2008 Mazda MX-5 Miata Grand Touring
- 2009 Mazda MX-5 Miata Touring
- 2009 Mazda MX-5 Miata Grand Touring
- 2010 Mazda MX-5 Miata Touring
- 2010 Mazda MX-5 Miata Grand Touring
- 2011 Mazda MX-5 Miata Touring
- 2011 Mazda MX-5 Miata Grand Touring
- 2011 Mazda MX-5 Miata Special Edition
- 2012 Mazda MX-5 Miata Touring
- 2012 Mazda MX-5 Miata Grand Touring
- 2012 Mazda MX-5 Miata Special Edition
- 2013 Mazda MX-5 Miata Grand Touring
- 2013 Mazda MX-5 Miata Club
- 2014 Mazda MX-5 Miata Grand Touring
- 2014 Mazda MX-5 Miata Club
- 2015 Mazda MX-5 Miata Grand Touring
- 2015 Mazda MX-5 Miata Club
- 2015 Mazda MX-5 Miata 25th Anniversary Edition
Warning: This product can expose you to chemicals including carbon black, glass wool fibers, or silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov
FAQ
Is this kit comfortable for daily driving?
Yes. The Performance Street disc's organic friction material and reduced marcel provide smooth, quieter engagement suited to daily use, paired with the added clamp load of the Heavy Duty pressure plate.
What's the benefit of the steel-backed disc lining?
The steel-backed lining increases burst strength and durability compared to a non-backed organic disc.
Does the kit include a pilot bearing and release bearing?
Pilot bearing and release bearing are included on applications where the vehicle requires them.
Does this kit fit the 2013 Club trim MX-5?
Yes, the ZM4-HDSS covers the 2013-2015 Club trim along with Sport, Touring, Grand Touring, Special Edition, and 25th Anniversary Edition trims across the 2006-2015 fitment range.
