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  See more parts for Subaru Baja
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ACT HD/Perf Street Sprung Kit Subaru Legacy | Outback | Forester | Baja | WRX 2005-2024 - SB11-HDSS

If you're looking to upgrade your clutch setup, the ACT SB11-HDSS kit is where it’s at. This isn't just any clutch kit; it combines the Heavy Duty pressure plate with a street disc that’s proven to handle the demands of daily driving and spirited weekend runs. The pressure plate features a unique diaphragm design that cranks up the clamp load while cutting down on deflection. What does that mean for you? More grip and a longer-lasting clutch, plain and simple.

Each diaphragm goes through a serious four-stage heat-treating process to ensure it can take the heat, literally. You’ll notice the difference in how solidly it engages, thanks to precision cover stampings that add rigidity and consistency. The Performance Street disc is made from high-quality organic materials with a good amount of copper mixed in, which helps with heat transfer. Plus, it’s got a steel-backed lining that boosts burst strength and durability. This setup is designed to give you quicker shifts, which is always a plus on the road or track.

Installation is straightforward:

What makes this kit stand out?

  • Pedal feel is light to moderate, making it easy to drive around town, but you still get smooth engagement and a bit of gear rattle for that sporty feel.
  • Thanks to ACT's diaphragm design, you’ll enjoy a longer friction life—no one wants to swap clutches every few months.
  • These parts are engineered with care, using premium materials that handle heat well and resist fade.
  • It's versatile enough for both street driving and track days.
  • Every component is clamp load tested and balanced, so you can push it to high RPMs without worrying about reliability.

Here are the specs you should know:

  • Clutch Master Cylinder: Not included
  • Grease: Yes, included
  • Grade Type: Performance
  • Flywheel: Yes, included
  • Pressure Plate: Heavy Duty
  • Release Bearing: Yes, included
  • Clutch Disc Diameter: 9.4 inches (240 mm)
  • Disc Material: Organic
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1 inch
  • Alignment Tool: Yes, included
  • Disc Type: Sprung Solid
  • Pressure Plate Bolts: Yes, included
  • Clutch Slave Cylinder: Not included
  • Flywheel Bolts: Not included
  • Flywheel Type: Streetlite
  • Product Weight: 28.6 lbs
  • Torque Capacity: 449 ft/lbs
  • Torque Capacity Over OE: 0.39

Important Notes:

  • This is a conversion kit that replaces the original 230mm clutch. You must use the ACT Flywheel that's included. If your Subaru was made after mid-2018, you might have the revised OEM components, which aren’t compatible with this kit. Also, pressure plate bolts are included (M8-1.25 x 16mm).

Compatible Vehicles:

  • Subaru Baja 2006
  • Subaru Forester 2006-2008
  • Subaru Legacy 2005-2012
  • Subaru Outback 2005-2009
  • Subaru WRX 2006-2024

Other Part Numbers:
ACT #actSB11-HDSS

Proposition 65

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

Vehicle
2006
 Subaru Baja
2006-2008
 Subaru Forester
2005-2012
 Subaru Legacy
2005-2009
 Subaru Outback
2006-2024
 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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