SKU: 83420081708

MS1-HDR4 - HD/Race Rigid 4 Pad

Sale price$218.70 Regular price$243.00
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Ships within 48 hours · Estimated delivery Sep 27 - Oct 2

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Description

MS1-HDR4 - HD/Race Rigid 4 PadSpecifications: Item Description: HD Race Rigid 4 Pad Product Weight (lbs.): 14. 4 Torque Capacity (ft lbs.): 420 Torque Capacity Over OE: 72% Disc Material: Ceramic Clutch Disc Diameter (Inches): 9. 4 Clutch Disc Diameter (Millimeters): 240 Input Shaft Diameter (inches): 1 Pressure Plate Type: Heavy Duty Warranty: 12 Months Description: The MS1 HDR4 kit features ACT's renowned Heavy Duty pressure plate, optimized for racing applications. ACT Heavy

Specifications:

  • Item Description: HD/Race Rigid 4 Pad
  • Product Weight (lbs.): 14.4
  • Torque Capacity (ft/lbs.): 420
  • Torque Capacity Over OE: 72%
  • Disc Material: Ceramic
  • Clutch Disc Diameter (Inches): 9.4
  • Clutch Disc Diameter (Millimeters): 240
  • Input Shaft Diameter (inches): 1
  • Pressure Plate Type: Heavy Duty
  • Warranty: 12 Months

Description: The MS1-HDR4 kit features ACT's renowned Heavy Duty pressure plate, optimized for racing applications. ACT Heavy Duty pressure plates utilize an exclusive diaphragm design to bolster clamp load, reduce deflection, and extend clutch life. Each diaphragm undergoes a meticulous four-stage heat-treating process for unparalleled performance. Precision cover stampings ensure rigidity and consistency in ACT pressure plates. The 4-pad rigid race discs are engineered with top-tier ceramic friction materials, with a chrome-moly hub heat-treated for maximum strength and durability. The lightweight, rigid design enables quicker shifts and seamless, trouble-free operation. Expect harsher engagement with the 4-pad rigid race disc, but enjoy faster shifting. This disc is particularly suited for smaller disc sizes in compact engines.

Features:

  • 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, uses select ceramic friction materials for high heat tolerance and maximum performance
  • Recommended Use: Recommended for race use only
  • ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Fitment Info:

  • Application: Engine
  • 1987 Chrysler Conquest Base: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged
  • 1987 Mitsubishi Starion ESi-R: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged
  • 1988 Chrysler Conquest TSi: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged
  • 1988 Mitsubishi Starion ESi: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged
  • 1988 Mitsubishi Starion ESi-R: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged
  • 1989 Chrysler Conquest TSi: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged
  • 1989 Mitsubishi Starion ESi-R: 2.6 L4 GAS FI 2555cc | SOHC | Turbocharged

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: 83420081708

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4.6 ★★★★★
Based on 16 reviews
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Natures Retreat
Phoenix, US
★★★★★ 3
Dog likes it
Flavor Name: Marshmallow & Peanut Butter, Size: Large
It wears faster on the longer side, my dog does love this, but 2 sides are not chewed as much.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 19, 2025
S
Verified Purchase
slz
Chelsea, US
★★★★★ 5
Terrific! Much easier to use than Kongs and my dog loves it.
Flavor Name: Peanut Butter, Size: Medium
I like these so much better than the original Kongs. The large opening makes it so much easier to put peanut butter or cream cheese into it. Plus much easier to clean out afterwards. My dog also likes to chew it and play with it throwing it in the air after he’s done eating the peanut butter. Very sturdy - he chews apart stuffed toys but his chewing hasn’t damaged this at all. I highly recommend this product!
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Reviewed in the United States on October 9, 2025
T
Verified Purchase
T Wolf
West Palm Beach, US
★★★★★ 5
Great for strong chewing dogs. Entertaining too!
Flavor Name: Peanut Butter, Size: Medium
My black lab can destroy the toughest of dog chew toys, but he's not destroyed this peanut. I fill it with peanut butter, yogurt, pumpkin or apple sauce and freeze it. It keeps him entertained for quite a while. When the filling is gone, he leaves it alone or carries it around begging for a filled one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
H
Verified Purchase
Heather Murphy
Alexandria, US
★★★★★ 5
Super cute! If you have one dog it'll last a while. If you have more than one...buy two.
Flavor Name: Marshmallow & Peanut Butter, Size: Large
This is THE FAVORITE chew toy in our household. We have two grown labs and a 10 month old mutt and they all love this toy. They got a variety of chew toys at Christmas and this is the one that they steal from each other. That said, they've definitely managed to kill it. It's well worth the money and it's held up well to heavy chewers but four months later and we're going to have to buy a new one. It's now a stub. They managed to break off all the marshmallows about a week ago and the stick itself is more like a chunk now but we definitely got our money's worth.
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Reviewed in the United States on May 1, 2025
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Verified Purchase
AvidShopper333
Chelsea, US
★★★★★ 5
Lasting 6 months in! Great smell.
Flavor Name: Marshmallow & Peanut Butter, Size: Large
This actually does smell like marshmallows which is definitely more pleasant than most dog chews!! It has held up to our power chewer. It’s a bit heavy for our smaller dog but he manages and it’s quite funny!! It’s a bit hard but that’s why it is holding up. Would buy again if this one ever wears out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 3, 2026

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