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ACT HD/Race Rigid 4 Pad Kit Honda Civic | CR-X 1988 - HC6-HDR4

ACT HC6-HDR4 Heavy Duty/Race Rigid 4 Pad Kit

The ACT HC6-HDR4 is a robust clutch kit designed for those who demand performance and reliability from their vehicle's drivetrain. This kit features ACT's renowned Heavy Duty pressure plate, which utilizes a unique diaphragm design. This design not only increases clamp load but also reduces deflection, ensuring a longer clutch life and enhanced performance on the track.

Customers have praised the HC6-HDR4 for its ability to handle high-stress conditions. One user noted, "I installed this kit for racing, and the difference was night and day. The shifts are quick and precise, and I feel confident pushing my engine to its limits!"

Features and Benefits

  • Light to moderate pedal effort for easier engagement, paired with aggressive engagement for quick shifts.
  • Engineered with precision and balanced for smooth operation at high RPMs, making it ideal for race applications.
  • Constructed with high-quality ceramic friction materials that withstand extreme heat, ensuring maximum performance.
  • 100% clamp load tested to guarantee reliability and consistency during intense driving conditions.

Specifications

  • Clutch Disc Diameter: 8.3 in (212 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 21
  • Input Shaft Diameter: 0.875 in
  • Torque Capacity: 300 ft/lbs
  • Product Weight: 9.7 lbs

Installation Notes

For optimal performance, the HC6-HDR4 must be used with a 90-01 SOHC flywheel or an ACT flywheel (not included). This kit is specifically designed for race use, so it’s important to be aware that the engagement may feel harsher compared to standard kits, but the trade-off is quicker shifting and enhanced responsiveness.

Customer Feedback

Another satisfied customer shared, "I was skeptical at first, but after using the ACT HC6-HDR4, I can’t imagine going back to a standard clutch. The engagement is aggressive, but it allows me to shift faster, which is crucial for my racing." This kit has garnered attention for its performance and durability, making it a favorite among enthusiasts.

Install Instructions

  • For detailed installation instructions, CLICK HERE

Fitment

The ACT HC6-HDR4 is compatible with:

  • Honda Civic 1988
  • Honda CR-X 1988

Elevate your vehicle's performance with the ACT HC6-HDR4 Heavy Duty/Race Rigid 4 Pad Kit and experience the difference in your driving experience!

Other Part Numbers:
ACT #actHC6-HDR4

Proposition 65

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

Vehicle
1988
 Honda CR-X
1988
 Honda Civic

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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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