MR1-HDG4 - HD/Race Sprung 4 Pad
SKU: 18989113835

MR1-HDG4 - HD/Race Sprung 4 Pad

Sale price$253.80 Regular price$282.00
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

MR1-HDG4 - HD/Race Sprung 4 PadSpecifications: Item Description: HD Race Sprung 4 Pad Product Weight (lbs.): 13 Torque Capacity (ft lbs.): 350 Torque Capacity Over OE: 77% Disc Material: Ceramic Clutch Disc Diameter (Inches): 8. 8 Clutch Disc Diameter (Millimeters): 224 Input Shaft Diameter (inches): 0. 875 Pressure Plate Type: Heavy Duty Warranty: 12 Months Description: The MR1 HDG4 kit by ACT features their renowned Heavy Duty pressure plate paired with a 4 pad spring centered

Specifications:

  • Item Description: HD/Race Sprung 4 Pad
  • Product Weight (lbs.): 13
  • Torque Capacity (ft/lbs.): 350
  • Torque Capacity Over OE: 77%
  • Disc Material: Ceramic
  • Clutch Disc Diameter (Inches): 8.8
  • Clutch Disc Diameter (Millimeters): 224
  • Input Shaft Diameter (inches): 0.875
  • Pressure Plate Type: Heavy Duty
  • Warranty: 12 Months

Description: The MR1-HDG4 kit by ACT features their renowned Heavy Duty pressure plate paired with a 4-pad spring-centered race disc, designed for high-performance street and race applications. ACT Heavy Duty pressure plates utilize an exclusive diaphragm design to bolster clamp load, minimize deflection, and extend clutch lifespan. Each diaphragm undergoes a meticulous four-stage heat-treating process for exceptional performance. Precision cover stampings on ACT pressure plates ensure rigidity and consistency. The 4-pad spring-centered race disc is engineered with a spring-center to effectively damp torsional vibrations and withstand harsh operating conditions. ACT's spring retainers provide additional support, reducing stress concentrations and enhancing reliability. While engagement may be more aggressive, the 4-pad spring-centered disc allows for quicker shifting, making it suitable for smaller engines with smaller disc sizes.

Features:

  • Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
  • Life: Moderate friction life, extended by ACT's exclusive diaphragm design
  • Quality: Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
  • Recommended Use: Recommended for high horsepower street or race use
  • ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Prop 65 Warning: This product can expose you to chemicals including carbon black, glass wool fibers, and silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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: 18989113835

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4.3 ★★★★★
Based on 2194 reviews
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Verified Purchase
Darren Gray
Lexington, US
★★★★★ 5
Good value
Model: NewSLS50_52, Model: NewSLS50_52
Working perfectly. Install of stereo equipment and carpet left me wanting some heat and sound resistant materials.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
T
Verified Purchase
Tharin
Houston, US
★★★★★ 5
BUY THIS ONE!
Model: NewSLS50_52
This is one of the good ones. There are other brands just as good, and manny brands are worse, but this handles well, rolls down easily, doesn't come off at all easily, and adapts to dips and curves like a champ. Appropriately heavy and dead, I'm happy with the way it smothers panel resonances and even at muffling direct sound, like a big hand over my Uncle Harry's eternally noisy mouth. You can rip the foil but you have to work hard at doing that. Remember to buy a brayer; you can roll overlaps nice and thin. Also remember to pre-wipe the sheet metal with a decent solvent like acetone or Stoddard/Varsol. It should last forever.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2025
H
Verified Purchase
Harvey
Charlottesville, US
★★★★★ 5
Good stuff, but watch the temp
Model: NewSLS50_52
I used this in my single cab pickup truck (89 ford.) It only took half the box (10 sheets or 25 square feet) to do the floors, but I bought the big box because I plan to do the doors, back wall, and maybe the roof as well. One thing I learned is that the temperature matters when you’re doing the installation. It was around 55F when I started in the evening, and when it dipped down into the 40s the sheets would not stick to the metal, and were hard to compress with the roller. That’s why I ended up only doing the floors and not any vertical surfaces; i will have to wait for a nice hot day. The other thing is that the foil layer on top is razor sharp at the edges, definitely wear gloves! I didn’t notice until after but I have little papercuts all over my fingers. Aside from those things, the install was easy and straightforward. The sheets cut easily with scissors, and any goo that ends up on your hands or scissors can be cleaned up with acetone (nail polish remover), or lacquer thinner. I would use this stuff again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 16, 2023
L
Verified Purchase
Lyrah
Fort Morgan, US
★★★★★ 5
Very efficient!
Model: NewSLS50_52
Amazing the difference it makes on dumping the noise. Very easy to install. Pell and stick literally! Great!
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Reviewed in the United States on November 23, 2025
J
Verified Purchase
Jak
Grantham, US
★★★★★ 5
Cost effective
Style: 8.7 sqft(8 pcs), Material Type: Aluminum 197 mil
Nice, cost effective material. It stuck nicely to the door and was fairly easy to use. The grid marks on the back made it easy to cut. I would not rank it up with other materials in sound and heat isolation, but it did cut down the overall vibrations on the door panels and I did not feel heat immediately from the floor area as i did with bare metal. If you are working with a budget and want modest improvement, this material will work well over most stock materials.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026

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