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ACT HD/Perf Street Sprung Kit Mazda Miata 2016-2018 - ZM12-HDSS

ACT ZM12-HDSS Heavy Duty Clutch Kit for Mazda Miata (2016-2018)

If you're looking to elevate your driving experience in your 2016-2018 Mazda Miata, the ACT ZM12-HDSS Heavy Duty Clutch Kit is a must-have upgrade. This kit is designed with the automotive enthusiast in mind, offering a perfect blend of performance and reliability. Featuring ACT's most popular Heavy Duty pressure plate and street disc, this setup is engineered to handle the demands of spirited driving and track days alike.

Fitment

  • Vehicle: Mazda Miata
  • Years: 2016-2018

Key Features

  • Light to moderate pedal effort for a comfortable driving experience.
  • Smooth, positive engagement that enhances your shifting performance.
  • Longer friction life due to ACT's exclusive diaphragm design, ensuring you get the most out of your clutch.
  • Precision-engineered with premium organic materials that provide excellent heat tolerance and reduced fade.
  • 100% clamp load tested and dynamically balanced for high RPM reliability—perfect for both street and race use.

Technical Specifications

  • Pressure Plate Type: Heavy Duty
  • Clutch Disc Diameter: 8.8 in (224 mm)
  • Input Spline Quantity: 22
  • Input Shaft Diameter: 0.9375 in
  • Torque Capacity: 312 ft/lbs
  • Product Weight: 17.2 lbs

Installation Notes

  • For detailed installation instructions, CLICK HERE.
  • This kit requires the use of the ACT 600870 flywheel (sold separately) or a modified OE flywheel.
  • Pressure plate bolts (M8-1.25 x 20mm) are included for easy installation.

Customer Feedback

“I installed the ACT ZM12-HDSS on my 2017 Miata, and the difference is night and day. The engagement is crisp, and I can feel the added torque capacity, especially during aggressive shifts. Highly recommend for anyone looking to improve their clutch performance!”

Upgrade your Miata's clutch with the ACT ZM12-HDSS kit and experience the performance difference that enthusiasts trust. With its robust design and reliable materials, this clutch kit is ready to support your driving passion, whether on the street or the track.

Other Part Numbers:
ACT #actZM12-HDSS

Proposition 65

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

Vehicle
2016-2018
 Mazda Miata

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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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