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ACT HD/Race Sprung 4 Pad Kit Nissan 180SX Type I | Type II JDM 1989-1998 - NS4-HDG4

ACT NS4-HDG4 Heavy Duty Clutch Kit

If you're looking to upgrade your clutch setup for your high-performance vehicle, the ACT NS4-HDG4 Heavy Duty Clutch Kit is a top contender. This kit features ACT's renowned Heavy Duty pressure plate, engineered specifically for those who demand reliability and performance from their clutch system. Whether you're a weekend warrior or a track enthusiast, this kit is designed to handle the rigors of spirited driving and racing.

Fitment

The ACT NS4-HDG4 is compatible with a variety of models, making it an excellent choice for car owners looking to enhance their ride's performance. Be sure to check compatibility with your specific year, make, and model to ensure a seamless installation.

Key Features

  • Light to moderate pedal effort for a comfortable driving experience.
  • Aggressive engagement that provides quick shifts, perfect for racing applications.
  • Moderate friction life enhanced by ACT's exclusive diaphragm design, ensuring longevity.
  • Constructed with select ceramic friction materials for high heat tolerance and maximum performance.
  • 100% clamp load tested and dynamically balanced for smooth operation at high RPMs.

Technical Specifications

  • Clutch Disc Diameter: 8.8 in (224 mm)
  • Torque Capacity: 390 ft/lbs
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1 in
  • Pressure Plate Type: Heavy Duty
  • Disc Material: Ceramic
  • Product Weight: 14.9 lbs
  • Grease Included: Yes
  • Pilot Bushing Included: Yes
  • Alignment Tool Included: Yes

Installation Instructions

For those who prefer to tackle installations themselves, ACT provides detailed instructions. CLICK HERE for the installation guide.

Customer Feedback

Owners of various performance vehicles have praised the ACT NS4-HDG4 for its reliability and performance. One 2021 Subaru WRX owner noted, "After installing the ACT NS4-HDG4, my shifts are noticeably quicker, and I have confidence in the clutch's ability to handle my modified engine's power." Another 2019 Honda Civic Si owner mentioned, "This clutch has transformed my driving experience—it's aggressive but manageable, and I love the responsiveness it brings to my shifts."

Optimize your vehicle's performance with the ACT NS4-HDG4 Heavy Duty Clutch Kit and experience the difference in every gear change!

Other Part Numbers:
ACT #actNS4-HDG4

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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ACT ? Advanced Clutch Technology | Clutch Kits & Flywheels Built to Handle Real Power

If you've added boost, tuned for more power, or simply want better throttle control, then your stock clutch won't cut it. That?s where ACT (Advanced Clutch Technology) comes in delivering high-performance clutch kits and flywheels designed for real drivers who push their builds on the street, strip, or track.

ACT?s lineup includes everything from daily driver friendly HD kits to hardcore twin disc setups for serious horsepower. Whether you?re launching hard in a WRX, drifting in a 370Z, or canyon carving in an M3, ACT gives you the torque capacity and engagement you need without sacrificing drivability.

Why ACT? Because Power Without Control Is Useless.
  • Hold More Power Engineered to handle turbo, supercharger, and high-compression builds
  • Faster Engagement Stronger pressure plates for better bite off the line
  • Better Pedal Feel Balanced response without going full race-car stiff
  • Reduced Rotational Mass Lightweight flywheels improve rev-matching and response
  • No Guesswork Direct-fit applications, no fabbing, no hassle
ACT Clutch Kits and Flywheels Fit the Cars Enthusiasts Build

ACT doesn?t just make universal performance parts ? they build complete, vehicle-specific clutch solutions for enthusiast favorites. Whether you daily a Civic Type R, track a Subaru STI, drift a 240SX, or drag a Mustang GT, ACT offers the right clutch to match your build goals.

Top supported platforms include the Nissan 350Z/370Z, Toyota Supra A90, Chevy Camaro SS/ZL1, Mitsubishi Evo, Ford Focus RS/ST, and BMW M3/M4 ? each with clutch options tuned to your driving needs.

What ACT Offers:
  • Performance Clutch Kits From HD street kits to twin-disc race systems
  • Clutch Discs 6-puck, full-face, rigid or sprung to match your style
  • Pressure Plates Heavy-duty options that increase clamp load without sacrificing control
  • Chromoly Lightweight Flywheels Quicker revs, smoother shifts, and less drivetrain stress
  • Complete Hardware Kits Everything you need for a proper install
Performance Tested. Driver Approved.

ACT isn?t hype ? it?s proven. Their clutches are SFI-certified, track-tested, and used by racers in drag, time attack, autocross, drift, and rally. But what really matters? They hold power, last longer, and feel right even after hundreds of hard launches or hours of canyon carving.

Whether you're upgrading for more power or replacing a tired OEM clutch, ACT gives you the bite, strength, and feel to drive harder with confidence. No compromises, no excuses just parts that work when it matters.

ACT warrants all products to be free of defects in materials and workmanship for normal use and service for a period of one (1) year from retail purchase. Written notice must be immediately given to ACT within the warranty period. We require a copy of the purchase receipt showing the unit was purchased from an Authorized Dealer or Advanced Clutch Technology directly to verify the product is under warranty. Products purchased used do not carry a warranty. This warranty is to the original purchaser and is non-transferable. All non-warranty items are subject to a $50 inspection bench test fee.

ACT reserves the right to examine any part returned for warranty claim to determine, to ACT's satisfaction, whether the material or workmanship of the part does not conform to this limited warranty. ACT's obligation under this warranty shall be limited to repairing, replacing, or crediting, at its option, any part which is deemed covered by ACT. No labor, lift or storage charges will be reimbursed for any reason. Damage to ACT's parts resulting from misuse, improper use, or abuse shall void this limited warranty. Failure to follow ACT's installation instructions and the vehicle manufacturers installation procedures and specifications shall void this limited warranty.

ACT undertakes no responsibility for the quality of the goods except as otherwise provided in this contract. ACT assumes no responsibility that the goods will be fit for any particular purpose for which you may be buying these goods, except as otherwise provided in the contract. ACT shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty.

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