Upgrade your driving experience with the ACT SB2-HDG4 Heavy Duty/Race Sprung 4 Pad Kit. Designed for enthusiasts who demand performance, this kit features ACT's renowned Heavy Duty pressure plate, crafted with an exclusive diaphragm design that enhances clamp load while minimizing deflection. This means you can expect improved clutch life, even under the most demanding conditions.
Each diaphragm undergoes a meticulous four-stage heat-treating process, ensuring exceptional performance and durability. The precision cover stampings not only provide rigidity but also ensure consistency across the board. The 4-pad spring-centered race disc is engineered to damp torsional vibrations, resulting in a quieter operation, while its robust construction can withstand the rigors of racing and high-performance driving.
Many users have praised the SB2-HDG4 for its responsive engagement and smooth shifting. One customer noted, "The difference in performance is night and day! My shifts are quicker, and I love the aggressive engagement." Another added, "I was worried about pedal effort, but it feels just right—light enough for daily driving but ready for the track!"
The ACT SB2-HDG4 is compatible with a range of vehicles, including:
For detailed installation instructions, CLICK HERE.
Other Part Numbers:
ACT #actSB2-HDG4
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2005-2006 Saab 9-2X |
9-2X | 2005-2006 |
|
2003-2006 Subaru Baja |
Baja | 2003-2006 |
|
2016-2017 Subaru Crosstrek |
Crosstrek | 2016-2017 |
|
1998-2013 Subaru Forester |
Forester | 1998-2013 |
|
1994-2023 Subaru Impreza |
Impreza | 1994-2023 |
|
1990-2009 Subaru Legacy |
Legacy | 1990-2009 |
|
2000-2009 Subaru Outback |
Outback | 2000-2009 |
|
2013-2015 Subaru XV Crosstrek |
XV Crosstrek | 2013-2015 |

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.