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ACT HD/Race Rigid 6 Pad Kit Honda Prelude 1990-1991 - HP4-HDR6

If you're looking to step up your game on the track or just want a clutch that can handle some serious power, the ACT HD/Race Rigid 6 Pad Kit (HP4-HDR6) is where it’s at. This kit features ACT's Heavy Duty pressure plate, which is a favorite among performance enthusiasts. What makes it special? Well, for starters, the diaphragm design is all about cranking up the clamp load while keeping deflection to a minimum. That means you get a clutch that lasts longer and performs better under pressure.

ACT doesn’t cut corners when it comes to durability. Each diaphragm goes through a four-stage heat-treating process, ensuring it can take the heat—literally. The precision cover stampings add to the rigidity and consistency, so you know you’re getting something built to last. And let’s talk about the 6-pad rigid race discs. Made from high-quality ceramic friction materials, they’re designed to handle the heat and keep things running smoothly. Plus, the chrome-moly hub is heat-treated for that extra layer of strength.

Now, I won’t sugarcoat it—this setup is meant for aggressive driving. The engagement is a bit harsher, but that’s what allows for those quick shifts that every racer craves. You’ll feel the difference when you’re powering through the gears. Just a heads-up, this 6-pad design is recommended for larger clutch sizes, which helps dissipate heat more effectively.

Install Instructions:

Features:

  • Light to moderate pedal effort with aggressive engagement—get ready for some gear rattle!
  • Moderate friction life, but it’s extended thanks to ACT's smart diaphragm design (just be aware that the rigid setup might wear the spline a bit faster).
  • Engineered for precision and balance, using select ceramic materials for high heat tolerance and max performance.
  • This one’s strictly for race use—if you’re serious about your driving, this is the clutch for you.
  • Every 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: Solid
  • Pressure Plate Bolts Included: No
  • Clutch Slave Cylinder Included: No
  • Flywheel Bolts Included: No
  • Product Weight: 12.8 lbs
  • Torque Capacity: 310 ft/lbs (that’s 0.83 over OE!)

Products Fitment:
This kit fits the Honda Prelude 1990-1991 like a glove.

Other Part Numbers:
ACT #actHP4-HDR6

Proposition 65

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

Vehicle
1990-1991
 Honda Prelude

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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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