If you're serious about getting the most out of your Porsche, the Advanced Clutch HD/Race Rigid 4 Pad Kit PO1-HDR4 is worth a look. This isn't just another clutch kit; it's built for those who want to push their ride to the limit. The centerpiece of this kit is ACT's Heavy Duty pressure plate, which uses a unique diaphragm design that cranks up the clamp load while minimizing deflection. This means you get better performance and a longer clutch life—something every enthusiast can appreciate.
What sets ACT apart is their commitment to quality. Each diaphragm goes through a rigorous four-stage heat-treating process, ensuring it can handle the heat when you're really pushing your Porsche. And let's talk about precision—these pressure plates are crafted with cover stampings that provide the rigidity and consistency you need for high-stakes driving.
The 4-pad rigid race discs are where the magic happens. Made from top-notch ceramic friction materials, they’re designed for serious performance. The chrome-moly hub is heat-treated, which means it’s tough and durable. The lightweight design allows for quicker shifts, making your driving experience smoother and more responsive. Sure, the engagement is on the harsher side, but if you want speed, that’s a trade-off you’re willing to make. Plus, this setup is ideal for smaller engine sizes, giving you that extra edge.
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In short, if you're looking to enhance your Porsche's performance on the track, the PO1-HDR4 kit is a solid choice. It’s built tough and designed for speed, so you can focus on what really matters—enjoying the ride.
Other Part Numbers:
ACT #actPO1-HDR4
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1991-1994 Porsche 964 |
964 | 1991-1994 |
|
1994-1998 Porsche 993 C2/C4 |
993 C2/C4 | 1994-1998 |
|
1996-1998 Porsche 993 Targa |
993 Targa | 1996-1998 |
|
1996-1997 Porsche 993 Turbo |
993 Turbo | 1996-1997 |

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.