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ACT HD/Race Sprung 4 Pad Kit Mazda Miata 1990-1993 - ZM1-HDG4

ACT Advanced Clutch HD/Race Sprung 4 Pad Kit ZM1-HDG4

If you're looking to elevate your Mazda Miata's performance from 1990-1993, the ACT ZM1-HDG4 Heavy Duty Clutch Kit is a game changer. Designed for those who push their cars to the limit, this kit combines a robust pressure plate with a specially engineered 4-pad race disc, ensuring that your clutch can handle the demands of spirited driving and track days alike.

Key Features

  • Light to moderate pedal effort with aggressive engagement for a responsive feel.
  • Engineered for moderate friction life, extended by ACT's exclusive diaphragm design.
  • Constructed with high-quality ceramic friction materials for exceptional heat tolerance and performance.
  • Tested to ensure 100% clamp load and dynamically balanced for reliable high RPM operation.
  • Ideal for high horsepower street or race applications.

Performance Specifications

  • Clutch Disc Diameter: 7.9 in (200 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 22
  • Input Shaft Diameter: 0.9375 in
  • Torque Capacity: 250 ft/lbs (0.86 over OE)
  • Product Weight: 11.1 lbs
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Pilot Bearing Included: Yes
  • Grease Included: Yes
  • Alignment Tool Included: Yes

Installation Notes

  • Must be used with the factory flywheel for optimal performance.
  • For detailed installation instructions, CLICK HERE.

Real-World Fitment

This clutch kit is specifically designed for the 1990-1993 Mazda Miata, making it a perfect choice for Miata owners who want to enhance their driving experience. Whether you're hitting the track or just enjoying a spirited drive on back roads, the ACT ZM1-HDG4 will provide the reliability and performance you need.

Customer Feedback

One Miata owner shared, "After installing the ACT ZM1-HDG4, I noticed a significant difference in how my car shifts. The engagement is definitely more aggressive, but it allows for quicker gear changes, which is exactly what I wanted for my weekend track days!"

Other Part Numbers:
ACT #actZM1-HDG4

Proposition 65

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

Vehicle
1990-1993
 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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