SKU: 82831614568

Z66-HDG4 - HD/Race Sprung 4 Pad

Sale price$265.50 Regular price$295.00
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Description

Z66-HDG4 - HD/Race Sprung 4 PadProduct Description: HD Race Sprung 4 Pad Clutch Kit The HD Race Sprung 4 Pad Clutch Kit, designated as Z66 HDG4, is engineered by ACT to provide exceptional performance in high horsepower street or race applications. Weighing 13. 7 pounds, this kit boasts a torque capacity of 355 ft lbs, exceeding OE standards by 87%. It features a ceramic clutch disc material with an 8. 8 inch (224mm) diameter and an input shaft diameter of 0. 9375 inches. At its

Product Description: HD/Race Sprung 4 Pad Clutch Kit

The HD/Race Sprung 4 Pad Clutch Kit, designated as Z66-HDG4, is engineered by ACT to provide exceptional performance in high horsepower street or race applications. Weighing 13.7 pounds, this kit boasts a torque capacity of 355 ft/lbs, exceeding OE standards by 87%. It features a ceramic clutch disc material with an 8.8-inch (224mm) diameter and an input shaft diameter of 0.9375 inches.

At its core, this kit features ACT's renowned Heavy Duty pressure plate, utilizing an exclusive diaphragm design to increase clamp load, reduce deflection, and maximize clutch life. Each diaphragm undergoes a meticulous four-stage heat-treating process for unmatched performance. Precision cover stampings ensure rigidity and consistency for reliable operation.

Paired with the pressure plate is ACT's 4-pad spring-centered race disc, featuring a spring center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. The 4-pad spring-centered race disc delivers harsher engagement but faster shifting, making it ideal for smaller disc sizes in smaller engines.

Key Features:

  • Feel: Light to moderate pedal effort, aggressive engagement, with OE to mild gear rattle.
  • Life: Moderate friction life, extended by ACT's exclusive diaphragm design.
  • Quality: Carefully engineered, precisely assembled, accurately balanced, using select ceramic friction materials for high heat tolerance and maximum performance.
  • Recommended Use: Specifically designed for high horsepower street or race use, catering to performance enthusiasts seeking uncompromising performance.
  • ACT Difference: Rigorously tested, ensuring 100% clamp load and dynamically computer balanced for smooth operation even at high RPMs.

Vehicle Fitment: This clutch kit is compatible with a wide range of vehicles, including various Mazda and Ford models from the 1993 to 2003 model years. Compatible vehicles include:

  • 1993-2003 Ford Probe Base, SE
  • 1993-2003 Mazda 626 DX, LX
  • 1993-2003 Mazda MX-6 Base
  • 2001-2003 Mazda Protege DX, ES, LX, Mazdaspeed
  • 2002 Mazda Protege5 Base

For enthusiasts demanding uncompromising performance and reliability in high horsepower applications, the HD/Race Sprung 4 Pad Clutch Kit from ACT is the ultimate choice, delivering unmatched performance both on the street and the track.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 82831614568

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Jonathan Helm
Charlottesville, US
★★★★★ 5
Great fit, true to size, comfortable, professional, good quality
Color: Dark Grey, Size: X-Large
I’m 6’4, 220lb with an athletic build. Great fit, good around the chest and sleeves and shirt are perfect length. Great shirt for work or a night out. Well made and comfortable! I’ll be ordering a few more colors without a doubt.
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Reviewed in the United States on May 28, 2026
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DSM
Waukegan, US
★★★★★ 4
Nice shirts with inconsistent fit
Color: Light Grey, Size: X-Large
I received the black version of this as a gift which I really liked and I got a lot of compliments for it. So I purchased this light gray but it does not fit as well. It's a little tighter and a little shorter. I was hoping they all would be the same fit but apparently they are not.
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Reviewed in the United States on January 31, 2026
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Larry Newell
Port Orchard, US
★★★★★ 5
Great Shirts…I’ve Bought most Colors.
Color: White-red, Size: Large
I’ve bought a dozen of these shirts in different colors in the last 10-12 months. Very nice material and launders and/or dry cleans great. Outstanding price for a nice looking shirt!
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Reviewed in the United States on May 28, 2026
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PARRIS CHARGOIS
Dallas, US
★★★★★ 5
This shirt brings mens dress shirts to a new level. My husband wears it with slacks or jeans.
Color: Army Green, Size: X-Large
Kudos to whoever designed and manufactured this shirt! It is stylish with interesting details. It can be gently washed in your washing machine and dried on a warm setting. The fabric is next level, feels like cotton with a tech stiffness to it. It has a dull sheen. I'd say "give it a shot". I ordered one and it was sooo handsome that I got my husband some other colors. Bonus.....The cut is generous enough to make a bit of a paunch disappear.
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Reviewed in the United States on May 14, 2026
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Ron
Omaha, US
★★★★★ 5
Well-made shirt.
Color: Light Grey, Size: Small
Material doesn’t feel light or flimsy. Very soft and fits well. Not too loose or too tight. Plan to purchase another one down the road.
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Reviewed in the United States on May 9, 2026

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