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  See more parts for Nissan 180SX
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ACT HD/Race Rigid 4 Pad Kit Nissan 180SX Type I | Type II JDM 1989-1998 - NS4-HDR4

If you're looking to step up your clutch game, the Advanced Clutch HD/Race Rigid 4 Pad Kit (NS4-HDR4) is a solid choice that won't let you down. This kit features ACT's renowned Heavy Duty pressure plate, which is designed with a unique diaphragm that ramps up the clamp load and minimizes deflection. What does that mean for you? Basically, it helps your clutch last longer while delivering the performance you crave.

ACT's pressure plates go through a rigorous four-stage heat-treating process, ensuring they can handle the heat of intense driving. Plus, the precision cover stampings provide the kind of rigidity and consistency you want when you're pushing your vehicle to its limits. Pair that with the 4-pad rigid race discs, crafted from top-notch ceramic friction materials, and you've got a setup that’s built for speed and durability. The chrome-moly hub is heat-treated, making it tough enough to withstand the rigors of racing.

Now, let's talk about shifting. The lightweight, rigid design of this kit allows for quicker shifts, which is a game changer when you're on the track. Sure, the engagement is a bit harsher compared to your typical setup, but that just means you can shift faster and keep your momentum going. It's particularly great for smaller engines where every bit of performance counts.

Install Instructions:

Features:

  • Light to moderate pedal effort with aggressive engagement—be ready for some gear rattle!
  • Moderate friction life, but thanks to ACT's clever diaphragm design, you'll get extended performance; just keep in mind that the rigid design might wear on splines a bit more.
  • Each component is engineered and balanced with precision, using select ceramic materials that can handle high temperatures.
  • Best suited for race use, so if you're hitting the track, this is your go-to.
  • Every unit is 100% clamp load tested and dynamically balanced, ensuring reliability at high RPMs.

Specifications:

  • Clutch Master Cylinder Included: No
  • Grease Included: Yes
  • Grade Type: Performance
  • Pilot Bushing Included: Yes
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Clutch Disc Diameter: 8.8 in (224 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1 in
  • Alignment Tool Included: Yes
  • Disc Type: Solid
  • Pressure Plate Bolts Included: No
  • Clutch Slave Cylinder Included: No
  • Flywheel Bolts Included: No
  • Product Weight: 13.5 lbs
  • Torque Capacity: 390 ft/lbs (0.74 over OE)

Overall, the NS4-HDR4 kit is a fantastic upgrade for anyone serious about performance. It combines durability with quick shifts, making it a must-have for those who live for the thrill of the race.

Other Part Numbers:
ACT #actNS4-HDR4

Proposition 65

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

Vehicle
1989-1998
 Nissan 180SX

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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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