SKU: 60932915371

NS1-HDR4 - HD/Race Rigid 4 Pad

Sale price$224.55 Regular price$249.50
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Description

NS1-HDR4 - HD/Race Rigid 4 PadProduct Description: The NS1 HDR4 kit from ACT is designed for high performance racing applications, featuring their renowned Heavy Duty pressure plate paired with a 4 pad rigid race disc. Engineered with precision and durability in mind, this kit offers uncompromising performance on the track. Specifications: Item Description: HD Race Rigid 4 Pad Product Weight: 14. 2 lbs. Torque Capacity: 475 ft lbs. Torque Capacity Over OE: 90% Disc Material:

Product Description:
The NS1-HDR4 kit from ACT is designed for high-performance racing applications, featuring their renowned Heavy Duty pressure plate paired with a 4-pad rigid race disc. Engineered with precision and durability in mind, this kit offers uncompromising performance on the track.

Specifications:
- Item Description: HD/Race Rigid 4 Pad
- Product Weight: 14.2 lbs.
- Torque Capacity: 475 ft/lbs.
- Torque Capacity Over OE: 90%
- 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 NS1-HDR4 kit combines ACT's popular Heavy Duty pressure plate with their 4-pad rigid race disc, engineered to withstand the rigors of racing. Utilizing ACT's exclusive diaphragm design, the Heavy Duty pressure plate increases clamp load, reduces deflection, and maximizes clutch life. Each diaphragm undergoes a four-stage heat-treating process for unparalleled performance. Precision cover stampings ensure rigidity and consistency, while the 4-pad rigid race disc, crafted from high-quality ceramic friction materials, offers exceptional heat tolerance and maximum performance. The chrome-moly hub is heat-treated for added strength and durability. The lightweight, rigid design allows for quicker shifts and trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster, making it well-suited for smaller disc sizes in smaller engines.

Description:
Feel:
Experience a light to moderate pedal effort with aggressive engagement and increased gear rattle, indicative of high-performance racing setups.

Life:
Expect moderate friction life, extended by ACT's exclusive diaphragm design. However, the rigid design may increase spline wear over time.

Quality:
Each component is carefully engineered, precisely assembled, and accurately balanced, utilizing select ceramic friction materials for high heat tolerance and maximum performance.

Recommended Use:
This kit is recommended for race use only, providing unmatched performance and durability on the track.

ACT Difference:
Every unit undergoes rigorous clamp load testing and dynamic computer balancing, ensuring smooth operation even under high RPM conditions.

Vehicle Fitment:
- 1990-1998 Nissan Bluebird SSS Attessa LTD. [JDM] - 2.0L I4 FI| T
- 1991-1998 Nissan Silvia K [JDM] - 2.0L I4 FI| T

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: 60932915371

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BoyMom
Lowell, US
★★★★★ 5
The only socks I will buy
Size: 6-10, Color: Halo Gray/Assorted
These are hands down my favorite socks to wear with tennis shoes. Bought my original 6 pack in the store, liked them so much I went buy more and they were gone. These don't slip on your heel like most socks do. Come up high enough on the top of your foot to protect from tongue rubbing (I giggled when I wrote that) and they come in fun colors. Love they are ultra no show and provide padding but people can't see them with shoes on. Five stars!
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Reviewed in the United States on January 12, 2023
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Sam K.
Lake Worth, US
★★★★★ 5
Socks
Size: Medium, Color: Black
Amazing socks. Fits Amazing. I tried to buy the six pack and it wasn’t the same. Thinner material. The 3 pack is great. Would buy again if it comes up.
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Reviewed in the United States on September 16, 2025
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Tyler W
Charlottesville, US
★★★★★ 4
Amazing socks but false advertising. They changed them.
Size: Large, Color: Black (6-pairs)
Okay well I have 4 stars because these are the best socks ever, infact, I threw out all my other socks and switched to just these. No show and they never slip. THE PROBLEM NOW, all the pairs I ordered before had a white symbol, and every time I buy more they have the grey and they are not as low show as my others… I wanted to simplify life and have all the same kind, no matching of colors or slightly different shape, but 4 times now I’ve ordered white symbol and gotten thicker longer ones with gray symbols. I’m considering switching all of my socks to the gray…. But the white symbol ones are way better, they don’t show with hey dudes on and gray symbol ones do now. I’m at a loss. Can someone tell me where to buy 100 pairs of white symbol so I never need to buy another sock again in my life?
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Reviewed in the United States on January 24, 2025
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lovecolor1
Grantham, US
★★★★★ 5
My favorite
Size: Medium, Color: Opal Blue/White/Cruise Blue (3-pairs)
My favorite socks, too bad under armour discontinued the cotton blend fabric and went to 100% polyester 😠
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Reviewed in the United States on March 16, 2026
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Natalie Williams
Fort Morgan, US
★★★★★ 5
Comfortable
Size: 6-10, Color: Halo Gray/Assorted
These are my favorite socks!
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Reviewed in the United States on September 22, 2025

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