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  See more parts for Mazda Mazda 3
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ACT HD/Race Rigid 4 Pad Kit Mazda Mazda 3 | Mazda 5 2004-2013 - ZM3-HDR4

The ACT ZM3-HDR4 is an advanced clutch kit designed specifically for performance enthusiasts who demand the best from their vehicles. This Heavy Duty/Race Rigid 4 Pad Kit combines cutting-edge engineering with high-quality materials to deliver exceptional performance on the track or the street.

One of the standout features of the ZM3-HDR4 is its exclusive diaphragm design, which significantly increases clamp load while minimizing deflection. This means you get a clutch that not only lasts longer but also performs more consistently under pressure. Customers have noted that the installation was straightforward, and the difference in performance was immediately noticeable. "After installing the ZM3-HDR4, my shifts are quicker and more precise," one user remarked. "I can really feel the power transfer!"

The kit includes ACT's renowned Heavy Duty pressure plate, which has undergone a four-stage heat-treating process for superior durability. The precision cover stampings provide added rigidity, ensuring that your clutch maintains its integrity even in demanding conditions. The 4-pad rigid race discs are made from high-quality ceramic friction materials, allowing for high heat tolerance and maximum performance. Another user said, "The engagement is definitely harsher, but the speed of shifting makes it worth it!"

With a lightweight and rigid design, the ZM3-HDR4 facilitates quicker shifts and smoother operation. However, it's important to note that while the engagement may be aggressive, it is ideally suited for race applications. This clutch kit has been 100% clamp load tested and dynamically computer balanced, ensuring reliability at high RPMs.

Features:

  • Light to moderate pedal effort with aggressive engagement
  • Moderate friction life, extended by ACT's exclusive diaphragm design
  • High heat tolerance due to select ceramic friction materials
  • Recommended for race use only
  • 100% clamp load tested for high RPM reliability

Specifications:

  • Clutch Master Cylinder Included: No
  • Grease Included: Yes
  • Grade Type: Performance
  • Pilot Bushing Included: No
  • Pressure Plate Type: Heavy Duty
  • Clutch Disc Diameter: 9 in (228 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 22
  • Input Shaft Diameter: 0.9375 in
  • Alignment Tool Included: Yes
  • Disc Type: Solid
  • Pressure Plate Bolts Included: No
  • Clutch Slave Cylinder Included: No
  • Flywheel Bolts Included: No
  • Pilot Bearing Included: Yes
  • Product Weight: 11.5 lbs
  • Torque Capacity: 340 ft/lbs
  • Torque Capacity Over OE: 0.67

Fitment:
Mazda Mazda 3 2004-2013
Mazda Mazda 5 2006-2010

Whether you're hitting the track or just want to enhance your driving experience, the ACT ZM3-HDR4 clutch kit is engineered to meet your performance needs. Upgrade today and feel the difference!

Other Part Numbers:
ACT #actZM3-HDR4

Proposition 65

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

Vehicle
2004-2013
 Mazda Mazda 3
2006-2010
 Mazda Mazda 5

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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