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  See more parts for Mazda Miata
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ACT HD/Race Rigid 4 Pad Kit Mazda Miata 2006-2015 - ZM5-HDR4

ACT ZM5-HDR4 Heavy Duty Clutch Kit

If you're a proud owner of a 2006-2015 Mazda Miata, the ACT ZM5-HDR4 Heavy Duty Clutch Kit is a performance upgrade you won't want to miss. Designed specifically for your Miata, this clutch kit combines durability and responsiveness, making it perfect for both spirited driving and track days.

Performance Features

  • Heavy Duty pressure plate with an exclusive diaphragm design enhances clamp load, minimizing deflection and maximizing clutch life.
  • Precision-engineered components ensure rigidity and consistency, resulting in reliable performance under high-stress conditions.
  • 4-pad rigid race discs utilize high-quality ceramic friction materials for optimal heat tolerance and durability.
  • Lightweight design allows for quicker shifts and smoother operation, although engagement is harsher for those who crave a more aggressive feel.

Installation & Compatibility

This kit is tailored for 5-speed applications only, making it a direct fit for your Miata. Installation is straightforward, and for those who like to get hands-on, you can find detailed installation instructions here.

Technical Specifications

  • Clutch Disc Diameter: 8.8 in (224 mm)
  • Input Spline Quantity: 22
  • Input Shaft Diameter: 0.9375 in
  • Torque Capacity: 359 ft/lbs (0.71 over OE)
  • Product Weight: 12 lbs
  • Release Bearing Included: Yes
  • Alignment Tool Included: Yes
  • Pressure Plate Bolts Included: Yes (M8-1.25 x 20mm)

Customer Feedback

Miata owners have reported significant improvements in their driving experience after installing the ZM5-HDR4. One user noted, "After putting this clutch in my 2010 Miata, the shifts are crisp, and I can feel the power transfer more effectively. It's definitely a must-have for anyone looking to enhance their ride!"

Important Notes

  • Designed for performance use, this clutch kit is recommended for racing applications.
  • While it offers moderate friction life, the unique diaphragm design may lead to increased spline wear, so keep that in mind for your maintenance schedule.

Upgrade your 2006-2015 Mazda Miata with the ACT ZM5-HDR4 Heavy Duty Clutch Kit and experience the difference in performance and control. Whether you're hitting the track or simply enjoying a spirited drive, this clutch kit is engineered to meet the demands of serious driving enthusiasts.

Other Part Numbers:
ACT #actZM5-HDR4

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2006-2015
 Mazda Miata

ACT Banner

ACT ? Advanced Clutch Technology | Clutch Kits & Flywheels Built to Handle Real Power

If you've added boost, tuned for more power, or simply want better throttle control, then your stock clutch won't cut it. That?s where ACT (Advanced Clutch Technology) comes in delivering high-performance clutch kits and flywheels designed for real drivers who push their builds on the street, strip, or track.

ACT?s lineup includes everything from daily driver friendly HD kits to hardcore twin disc setups for serious horsepower. Whether you?re launching hard in a WRX, drifting in a 370Z, or canyon carving in an M3, ACT gives you the torque capacity and engagement you need without sacrificing drivability.

Why ACT? Because Power Without Control Is Useless.
  • Hold More Power Engineered to handle turbo, supercharger, and high-compression builds
  • Faster Engagement Stronger pressure plates for better bite off the line
  • Better Pedal Feel Balanced response without going full race-car stiff
  • Reduced Rotational Mass Lightweight flywheels improve rev-matching and response
  • No Guesswork Direct-fit applications, no fabbing, no hassle
ACT Clutch Kits and Flywheels Fit the Cars Enthusiasts Build

ACT doesn?t just make universal performance parts ? they build complete, vehicle-specific clutch solutions for enthusiast favorites. Whether you daily a Civic Type R, track a Subaru STI, drift a 240SX, or drag a Mustang GT, ACT offers the right clutch to match your build goals.

Top supported platforms include the Nissan 350Z/370Z, Toyota Supra A90, Chevy Camaro SS/ZL1, Mitsubishi Evo, Ford Focus RS/ST, and BMW M3/M4 ? each with clutch options tuned to your driving needs.

What ACT Offers:
  • Performance Clutch Kits From HD street kits to twin-disc race systems
  • Clutch Discs 6-puck, full-face, rigid or sprung to match your style
  • Pressure Plates Heavy-duty options that increase clamp load without sacrificing control
  • Chromoly Lightweight Flywheels Quicker revs, smoother shifts, and less drivetrain stress
  • Complete Hardware Kits Everything you need for a proper install
Performance Tested. Driver Approved.

ACT isn?t hype ? it?s proven. Their clutches are SFI-certified, track-tested, and used by racers in drag, time attack, autocross, drift, and rally. But what really matters? They hold power, last longer, and feel right even after hundreds of hard launches or hours of canyon carving.

Whether you're upgrading for more power or replacing a tired OEM clutch, ACT gives you the bite, strength, and feel to drive harder with confidence. No compromises, no excuses just parts that work when it matters.

ACT warrants all products to be free of defects in materials and workmanship for normal use and service for a period of one (1) year from retail purchase. Written notice must be immediately given to ACT within the warranty period. We require a copy of the purchase receipt showing the unit was purchased from an Authorized Dealer or Advanced Clutch Technology directly to verify the product is under warranty. Products purchased used do not carry a warranty. This warranty is to the original purchaser and is non-transferable. All non-warranty items are subject to a $50 inspection bench test fee.

ACT reserves the right to examine any part returned for warranty claim to determine, to ACT's satisfaction, whether the material or workmanship of the part does not conform to this limited warranty. ACT's obligation under this warranty shall be limited to repairing, replacing, or crediting, at its option, any part which is deemed covered by ACT. No labor, lift or storage charges will be reimbursed for any reason. Damage to ACT's parts resulting from misuse, improper use, or abuse shall void this limited warranty. Failure to follow ACT's installation instructions and the vehicle manufacturers installation procedures and specifications shall void this limited warranty.

ACT undertakes no responsibility for the quality of the goods except as otherwise provided in this contract. ACT assumes no responsibility that the goods will be fit for any particular purpose for which you may be buying these goods, except as otherwise provided in the contract. ACT shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty.

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