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  See more parts for Subaru Impreza
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ACT HD-M/Race Sprung 4 Pad Kit Subaru | Impreza | Legacy | STI | WRX 2004-2022 - SB10-HDG4

ACT SB10-HDG4 Heavy Duty Clutch Kit

If you’re looking to enhance your Subaru’s performance, the ACT SB10-HDG4 Heavy Duty Clutch Kit is a top-tier upgrade that delivers reliability and power. This kit is specifically designed for a range of Subaru models, including:

  • Subaru Impreza (2004-2014)
  • Subaru Legacy (2007-2009)
  • Subaru STI (2004-2021)
  • Subaru WRX (2013-2022)

Why Choose the ACT SB10-HDG4?

The SB10-HDG4 features ACT's renowned Heavy Duty pressure plate, engineered with an exclusive diaphragm design that increases clamp load while minimizing deflection. This means you get a clutch that not only lasts longer but also performs exceptionally well under stress. Each diaphragm undergoes a rigorous four-stage heat treatment process, ensuring durability and outstanding performance on the track or street.

Performance Features

  • Light to moderate pedal effort for improved drivability.
  • Aggressive engagement with rapid shifting response, perfect for spirited driving.
  • Designed to withstand high horsepower applications, whether on the road or the race track.
  • Includes ACT's patented Monoloc system for enhanced alignment and reliability.

Technical Specifications

  • Clutch Disc Diameter: 9.4 in (240 mm)
  • Torque Capacity: 668 ft/lbs
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1 in
  • Disc Material: Ceramic
  • Product Weight: 17.2 lbs
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Alignment Tool Included: Yes
  • Grease Included: Yes

Installation and Compatibility

Installing the ACT SB10-HDG4 is straightforward, making it a great choice for DIY enthusiasts. For detailed installation instructions, CLICK HERE.

Customer Insights

Subaru WRX owners have reported significant improvements in shifting performance after installing the SB10-HDG4. One owner mentioned, "After putting this clutch in my 2018 WRX, the engagement is crisp, and I can feel the difference during hard shifts. It handles my power upgrades without a hitch!"

Final Thoughts

The ACT SB10-HDG4 Heavy Duty Clutch Kit is an essential upgrade for Subaru enthusiasts seeking enhanced performance and durability. With its robust construction and proven design, this clutch kit is built to handle the demands of high-performance driving while ensuring a smooth and reliable experience.

Other Part Numbers:
ACT #actSB10-HDG4

Proposition 65

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

Vehicle
2004-2014
 Subaru Impreza
2007-2009
 Subaru Legacy
2004-2021
 Subaru STI
2013-2022
 Subaru WRX

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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