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  See more parts for Honda Prelude
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ACT HD/Race Sprung 4 Pad Kit Honda Prelude 1990-1991 - HP4-HDG4

If you're looking to dial in your clutch game, the ACT HD/Race Sprung 4 Pad Kit (HP4-HDG4) is a solid choice. This kit features ACT's Heavy Duty pressure plate, which is a favorite among folks who push their cars hard. The diaphragm design is not just for show; it cranks up the clamp load, cuts down on deflection, and helps the clutch last longer. They've even got a four-stage heat-treating process to make sure it can handle the heat when you're really putting the pedal down.

The pressure plate is built to be rigid and consistent, thanks to precision cover stampings. Now, let’s talk about the 4-pad spring-centered race disc. This bad boy is designed to dampen torsional vibrations, which means quieter operation and less chance of failure, even when you’re really pushing it. The wraparound spring windows and thicker retainers provide solid support, so you don’t have to worry about it giving out when you need it most.

Sure, engagement can be a bit harsher, but that’s part of the deal when you want faster shifting. This setup is perfect for smaller engines and discs, especially if you're running something like a Honda Prelude from 1990-1991. It clears the way for some serious performance without compromising on reliability.

Install Instructions:

Features:

  • Light to moderate pedal effort with aggressive engagement, expect some mild gear rattle.
  • Moderate friction life, thanks to ACT's unique diaphragm design that extends longevity.
  • Carefully engineered and balanced, using select ceramic friction materials for high heat tolerance.
  • Great for high horsepower street or race applications.
  • Each unit is 100% clamp load tested and dynamically balanced for smooth operation at high RPMs.

Specifications:

  • Clutch Master Cylinder Included: No
  • Grease Included: Yes
  • Grade Type: Performance
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Clutch Disc Diameter: 8.7 in (220 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1.03125 in
  • Alignment Tool Included: Yes
  • Disc Type: Sprung Solid
  • Pressure Plate Bolts Included: No
  • Clutch Slave Cylinder Included: No
  • Flywheel Bolts Included: No
  • Product Weight: 12.9 lbs
  • Torque Capacity: 310 ft/lbs
  • Torque Capacity Over OE: 0.83

This kit is a game-changer for your Honda Prelude, giving you the performance boost you’ve been craving. It’s built to last, and you’ll feel the difference every time you hit the gas.

Other Part Numbers:
ACT #actHP4-HDG4

Proposition 65

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

Vehicle
1990-1991
 Honda Prelude

ACT Banner

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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