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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Linda Arndt
Carnegie, US
★★★★★ 5
Nice, versatile and comfy shirt
Size: Large, Color: Dark Blue
Ordered the dark charcoal for our son-in-law and he liked it so much that I ordered the teal and gray for my husband. He’s worn them both many times and they still look great. They can be worn casually with jeans or dressed up with nicer slacks. Very soft and comfy. Nice quarter zip style.
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Candi
Cuba, US
★★★★★ 5
Great quality and look
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My husband loved the quality, comfort and feel of this pullover. Fits him great!
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Reviewed in the United States on December 30, 2025
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Brady Lucas
Louisville, US
★★★★★ 5
Great fit and comfortable.
Size: X-Large, Color: Chestnut Brown
Great fit and pairs well with jeans or dress pants. Quality material that is soft and comfy. Worth the price!
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Reviewed in the United States on December 3, 2025
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carolyn Lindstrom
Chelsea, US
★★★★★ 5
True to size
Size: Medium, Color: Light Blue
True to size very good material. The quality is excellent. It’s lightweight and it says that the color I love very much in style.
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jmharn
Los Angeles, US
★★★★★ 1
Not worth buying
Size: Small, Color: Light Blue
Cheap material, stitching looks cheap, and the collar is way too big, almost like it’s a wrong cut. It doesn’t look good at all. Decide it to throw away in the trash right away. It’s a $25 mistake.
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Reviewed in the United States on May 21, 2026

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