Product Information
This ACT clutch kit, model SB10 - HDG4, is a top - notch choice for Subaru owners. It fits 2004 - 2021 Subaru STI and 2007 - 2009 Subaru Legacy GT Spec B models. Note that Legacy GT spec.B models need to use the STI flywheel to use this clutch. The kit features a sprung, 4 - pad race clutch disc paired with a popular Xtreme pressure plate. You'll enjoy light to moderate pedal effort with aggressive engagement and the ability to handle up to 668 ft/lbs of torque. It's perfect for high - horsepower street or race use. The heavy - duty pressure plates use an exclusive diaphragm design to boost clamp load, cut deflection, and maximize clutch life. The diaphragms go through a four - stage heat - treating process for great performance. The precision - stamped covers provide rigidity and consistency. The 4 - pad spring - centered race disc dampens vibrations for quiet operation and resists failure in tough conditions. The spring retainers offer great support and reliability. With this disc, engagement is harsher but shifting is faster, making it ideal for smaller engines. The Monoloc, a one - piece upgrade, ensures proper alignment and is made of hardened Chrome - moly steel for long - term service. You'll get a 4 - pad sprung race disc, an Xtreme pressure plate, an alignment tool, a pilot bearing, and a release bearing in the package. It's 100% clamp load tested and dynamically computer - balanced for smooth high - RPM reliability and includes ACT's patented Monoloc.
Using this ACT clutch kit is straightforward. First, make sure your vehicle is the right model - it fits 2004 - 2021 Subaru STI and 2007 - 2009 Subaru Legacy GT Spec B. Remember, if you have a Legacy GT spec.B, you need to use the STI flywheel. When installing, follow the included alignment tool instructions to ensure everything is properly lined up. During driving, you'll notice the light to moderate pedal effort and aggressive engagement. This clutch can handle up to 668 ft/lbs of torque, so you can drive with confidence on high - horsepower streets or race tracks. For maintenance, regularly check the clutch for any signs of wear. If you notice strange noises or a change in pedal feel, it might be time to have it inspected. The Monoloc, made of hardened Chrome - moly steel, is durable, but it's still a good idea to keep an eye on it. Also, since the diaphragms in the pressure plate go through a special heat - treating process, avoid overheating the clutch by not riding the clutch pedal for long periods. With proper use and care, this clutch kit will serve you well for a long time.
