Alright, let’s talk about the ACT HD/Perf Street Sprung Kit HC4-HDSS. If you're looking to beef up your clutch game, this is where you want to start. This kit packs ACT's most popular heavy-duty pressure plate and a street disc that’s proven itself time and again. What sets this pressure plate apart is its unique diaphragm design. It cranks up the clamp load, cuts down on deflection, and helps your clutch last longer. Seriously, they put these diaphragms through a four-stage heat-treating process, and it shows in the performance.
The pressure plate’s got precision cover stampings that add some serious rigidity. You want reliability, especially if you’re pushing your car a bit harder—this setup delivers. Now, about that Performance Street disc: it's made with high copper content organic materials that help with heat transfer, plus it’s got a steel-backed lining that boosts durability. With reduced marcel, you’ll notice quicker shifts, which is a game-changer when you’re on the go.
Install Instructions:
Features:
Specifications:
Products Fitment:
This kit is a solid choice if you're looking to improve your clutch setup without going overboard. It’s got the durability and performance to keep you going, whether you’re on the street or hitting the track. Trust me, you won’t regret it.
Other Part Numbers:
ACT #actHC4-HDSS
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1989-1991 Honda CR-X |
CR-X | 1989-1991 |
|
1989-1991 Honda Civic |
Civic | 1989-1991 |

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.