If you're looking to take your ride to the next level, the ACT HD/Race Sprung 4 Pad Kit HA1-HDG4 is a solid choice. This kit features ACT's renowned Heavy Duty pressure plate, which is designed to hold up under pressure—literally. The unique diaphragm design cranks up the clamp load, cuts down on deflection, and helps your clutch last longer. Trust me, after going through the four-stage heat treatment process, these diaphragms are built to perform.
What I really appreciate about ACT’s pressure plates is the precision cover stamping. It gives the plate that extra rigidity and consistency you want when you're pushing your vehicle to its limits. Now, let’s talk about the 4-pad spring-centered race disc. This bad boy has a spring center that does a great job of damping torsional vibrations, which means quieter operation and less chance of failure—even when you're really pushing it. And with the thicker retainer stampings and wraparound spring windows, you get some serious support that reduces stress and boosts reliability.
Sure, the engagement might feel a bit harsher, but that just means faster shifting. If you’ve got a smaller engine, this setup is particularly well-suited for you. It’s like having a secret weapon in your corner when you're on the track or just cruising around town.
Install Instructions:
Features:
Specifications:
Products Fitment:
Honda Accord 1983-1985
Honda Prelude 1983-1987
Other Part Numbers:
ACT #actHA1-HDG4
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1983-1985 Honda Accord |
Accord | 1983-1985 |
|
1983-1987 Honda Prelude |
Prelude | 1983-1987 |

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.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: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.