SKU: 66382030535

ZM4-HDR4 - HD/Race Rigid 4 Pad

$246.60 $274.00
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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24

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Description

ZM4-HDR4 - HD/Race Rigid 4 PadSpecifications: HD Race Rigid 4 Pad Clutch Kit Item Description: HD Race Rigid 4 Pad Product Weight (lbs.): 12 Torque Capacity (ft lbs.): 359 Torque Capacity Over OE: 71% Disc Material: Ceramic Clutch Disc Diameter (Inches): 8. 8 Clutch Disc Diameter (Millimeters): 224 Input Shaft Diameter (inches): 1 Pressure Plate Type: Heavy Duty Warranty: 12 Months Description: The ZM4 HDR4 kit by ACT includes their most popular Heavy Duty pressure plate matched

Specifications: HD/Race Rigid 4 Pad Clutch Kit

  • Item Description: HD/Race Rigid 4 Pad
  • Product Weight (lbs.): 12
  • Torque Capacity (ft/lbs.): 359
  • Torque Capacity Over OE: 71%
  • Disc Material: Ceramic
  • Clutch Disc Diameter (Inches): 8.8
  • Clutch Disc Diameter (Millimeters): 224
  • Input Shaft Diameter (inches): 1
  • Pressure Plate Type: Heavy Duty
  • Warranty: 12 Months

Description: The ZM4-HDR4 kit by ACT includes their most popular Heavy Duty pressure plate matched with a 4-pad rigid race disc. ACT Heavy Duty pressure plates utilize an exclusive diaphragm design to increase clamp load, diminish deflection, and extend clutch life. Each diaphragm undergoes a four-stage heat-treating process for exceptional performance. Precision cover stampings ensure rigidity and consistency.

ACT's 4-pad rigid race discs are constructed with high-quality ceramic friction materials and a chrome-moly hub heat-treated for strength and durability. The lightweight, rigid design facilitates quicker shifts and smooth, trouble-free service. Although engagement with the 4-pad rigid race disc is harsher, shifting is faster, making it well-suited for smaller disc sizes in smaller engines.

Key Characteristics:

  • Feel: Light to moderate pedal effort, aggressive engagement, increased gear rattle.
  • Life: Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear.
  • Quality: Carefully engineered, precisely assembled, accurately balanced, using select ceramic friction materials for high heat tolerance and maximum performance.

Recommended Use: Recommended for race use only, particularly suited for applications where quick, aggressive shifts are necessary.

ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability.

Vehicle Fitment: Compatible with various Mazda MX-5 Miata models from 2006 to 2015, including Grand Touring, Sport, Touring, GT, Special Edition, Club, and GS. All models equipped with the 2.0 L4 GAS FI 2000cc engine.

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: 66382030535

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4.7 ★★★★★
Based on 9 reviews
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David Hartnell
San Leandro, US
★★★★★ 5
Better sleep, better mood
This definitely helped my mood and sleeping. It literally changed my default. The only electrolyte that can pass the blood brain barrier. I recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
J
Verified Purchase
Jz
Battle Creek, US
★★★★★ 5
For better sleep and consultation and calming effect.
It seems to work for me, it makes me calm but energetic, plus I sleep for 8 hours since taking it.
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Reviewed in the United States on May 10, 2026
R
Verified Purchase
Redirtgrl
Grantham, US
★★★★★ 3
Not working for me 100%
Still not sure about how this magnesium affects me. I have only been taking one tablet an hour or two before bedtime. Seems like sometimes I can’t go to sleep after taking it, charges up my brain. Other times I sleep but have crazy dreams. Maybe it works for some, but not others. I’ll try to finish the bottle, but the lack of sleep after taking the Magnesium L-Threonate makes me hesitant to continue some nights. That’s mainly the reason I purchased this brand to include the reviews.
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Reviewed in the United States on February 12, 2026
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Verified Purchase
paul culling
Port Orchard, US
★★★★★ 5
Helps Relax the muscles
I like to take a magnesium supplement daily, usually in the evening before going to be as it helps relax me for sleep
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
N
Verified Purchase
new beginnings
Los Angeles, US
★★★★★ 5
very good
Format: Kindle
Another good addition to this publisher's collection. The book is well organized, flows well and is very readable. The main thing I have like about this series is that they don't just cover the "highlights," although they do a good job on those, but how they cover more of the daily lives of the people. I was surprised at exactly how hard the people's lives were by choice, not just men but woman as well. I can't imagine being drafted into the military at age 5 or 6 and staying there until you were thirty. And eating "black soup" a concoction made of pork, pigs' blood, onions, salt and vinegar. To paraphrase a quote, it's no wonder Spartans were prepared to die when all you eat was this soup! I was also surprised by the freedoms including education and land ownership of the woman of Sparta giving the era.....and the sexual freedom they had was more surprising. There is a lot more information of interest. This is a good book and most will enjoy reading it
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Reviewed in the United States on February 22, 2022

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