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  See more parts for Mazda 3
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ACT HD/Race Sprung 4 Pad Kit Mazda Mazda 3 | Mazda 6 2004-2013 - ZX4-HDG4

Introducing the ACT ZX4-HDG4 Heavy Duty/Race Sprung 4 Pad Kit, designed for those who demand performance and reliability from their clutch system. This kit features ACT's renowned Heavy Duty pressure plate, which utilizes an exclusive diaphragm design to enhance clamp load, minimize deflection, and extend clutch life. Every diaphragm undergoes a meticulous four-stage heat-treating process, ensuring exceptional performance even under intense conditions.

Customers have noted that the ZX4-HDG4 provides a noticeable improvement in engagement and responsiveness. One user shared, "After installing the ACT kit, my shifts are quicker, and I can really feel the difference during hard acceleration. It's a must for anyone serious about performance!"

The pressure plates are crafted with precision cover stampings that enhance rigidity and consistency, making them a reliable choice for high-stress applications. The 4-pad spring-centered race disc is engineered to damp torsional vibrations, allowing for quieter operation while resisting failure in demanding environments. The robust design of ACT's spring retainers, featuring wraparound spring windows and thicker stampings, provides additional support and increases overall strength and reliability.

Key Features:

  • Light to moderate pedal effort with aggressive engagement, suitable for street or race use.
  • Moderate friction life extended by the innovative diaphragm design.
  • Constructed with high-performance ceramic friction materials for enhanced heat tolerance.
  • 100% clamp load tested and dynamically balanced for smooth operation at high RPMs.

Specifications:

  • Clutch Master Cylinder Included: No
  • Grease Included: Yes
  • Grade Type: Performance
  • Flywheel Included: Yes
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Clutch Disc Diameter: 9.4 in (240 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 23
  • Input Shaft Diameter: 1 in
  • Alignment Tool Included: Yes
  • Disc Type: Sprung
  • Pressure Plate Bolts Included: Yes
  • Pilot Bearing Included: Yes
  • Flywheel Type: Prolite
  • Product Weight: 30 lbs
  • Torque Capacity: 574 ft/lbs

Notes:

  • This is a conversion kit that includes the ACT Prolite flywheel and pressure plate bolts (M8-1.25 x 16mm).

Fitment:

  • Mazda Mazda 3 (2004-2013)
  • Mazda Mazda 6 (2003-2008)

Upgrade your vehicle's performance with the ACT ZX4-HDG4 and experience the difference in your driving dynamics!

Other Part Numbers:
ACT #actZX4-HDG4

Proposition 65

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

Vehicle Make/Model
Mazda 3 2004-2006, 2008-2012 GS
Mazda 3 2004-2006, 2008-2013 GT
Mazda 3 2004-2006, 2008-2013 GX
Mazda 3 2004-2013 S
Mazda 3 2004-2013 i
Mazda 3 2005 SP23
Mazda 3 2007-2013 Mazdaspeed
Mazda 3 2010-2013 I Touring
Mazda 3 2010-2013 Grand Touring
Mazda 3 2011 Sport GX
Mazda 3 2011 Sport GS
Mazda 3 2011 Sport GT
Mazda 3 2012-2013 GS-SKY
Mazda 6 2003-2008 S
Mazda 6 2006-2007 Mazdaspeed
Mazda 6 2008 i
Mazda 6 2008 GT
Mazda 6 2008 GS
Mazda Mazda 6 2003-2007 i

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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