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ACT HD/Race Rigid 4 Pad Kit Toyota Corona 1969-1970 - TK1-HDR4

ACT TK1-HDR4 Heavy Duty Clutch Kit

If you're looking to enhance your vehicle's performance, the ACT TK1-HDR4 Heavy Duty/Race Rigid 4 Pad Kit is engineered specifically for those who demand more from their clutch system. This kit features ACT's most popular Heavy Duty pressure plate, designed to deliver increased clamp load while minimizing deflection, ultimately extending the life of your clutch. All diaphragms go through a rigorous four-stage heat-treating process to ensure unmatched performance, making it a top choice for serious drivers.

Fitment

The TK1-HDR4 is compatible with a range of vehicles, providing a perfect fit for those who want to push their machines to the limit. Whether you're a Honda Civic owner looking for that extra bite during spirited driving or a Subaru WRX enthusiast seeking quick shifts on the track, this clutch kit is designed to meet your needs.

Performance Features

  • Light to moderate pedal effort with aggressive engagement for a direct feel.
  • Engineered with a rigid design that may increase gear rattle but enhances shifting speed.
  • Utilizes high-quality ceramic friction materials for superior heat tolerance and performance.
  • Perfect for race use, ensuring you get the most out of your engine's power.
  • Each unit is 100% clamp load tested and dynamically computer balanced, ensuring smooth operation even at high RPMs.

Technical Specifications

  • Clutch Disc Diameter: 7.9 in (200 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 21
  • Input Shaft Diameter: 0.9375 in
  • Product Weight: 9.8 lbs
  • Torque Capacity: 265 ft/lbs
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Pilot Bearing Included: Yes
  • Grease Included: Yes
  • Alignment Tool Included: Yes

Installation Instructions

Ready to install? For detailed installation instructions, CLICK HERE.

Customer Feedback

I installed the TK1-HDR4 on my 2020 Subaru WRX, and the difference is night and day. The engagement is aggressive, but shifts are lightning-fast. No more hesitation when I m shifting hard on the track! - James, WRX Owner

After putting this clutch kit in my 2018 Civic Si, I can confidently say it s a game changer. The pedal feel is just right, and I can feel the extra torque transfer. Highly recommend for anyone serious about performance! - Mike, Civic Si Owner

Upgrade your ride with the ACT TK1-HDR4 Heavy Duty Clutch Kit engineered for those who demand reliability and performance on the road or track.

Other Part Numbers:
ACT #actTK1-HDR4

Proposition 65

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

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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