ACT Heavy Duty Clutch Kit 6 Puck Race Sprung Subaru STI 2004-2021 / Legacy GT Spec B 2007-2009 | SB10-HDG6

This ACT clutch kit is a great choice for Subaru enthusiasts. 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 SB10 - HDG6 kit features a sprung, 6 - pad race clutch disc paired with an Xtreme pressure plate. You'll experience light to moderate pedal effort with aggressive engagement and it can handle up to 668 ft/lbs of torque. Ideal for high - horsepower street or race use. ACT's heavy - duty pressure plates use an exclusive diaphragm design to boost clamp load, reduce deflection, and maximize clutch life. The diaphragms go through a four - stage heat - treating process for top - notch performance. The pressure plates have precision cover stampings for rigidity. The 6 - pad spring - centered race disc dampens torsional vibrations and resists failure in tough conditions. The spring retainers offer better support and reliability. With this disc, engagement is harsher but shifting is faster, and it's great for larger clutch sizes to absorb heat. The Monoloc is a one - piece upgrade, providing uniform loading for proper alignment. Its hardened Chrome - moly steel construction ensures long - lasting service. This kit includes a 6 - pad sprung race disc, an Xtreme pressure plate, an alignment tool, a pilot bearing, and a release bearing. It's 100% clamp load tested and dynamically computer - balanced for smooth high - RPM reliability and comes with ACT's patented Monoloc.

Using this ACT clutch kit is straightforward. First, make sure your vehicle is a 2004 - 2021 Subaru STI or a 2007 - 2009 Subaru Legacy GT Spec B. If it's a Legacy GT spec.B, you'll need to install the STI flywheel. When installing the clutch kit, use the alignment tool provided to ensure proper alignment. The pilot bearing and release bearing should be installed as per the standard procedure. During normal use, you'll notice light to moderate pedal effort and aggressive engagement. You can shift quickly, especially when you're on the street or the race track. Just be aware that the engagement is a bit harsher, so take some time to get used to it. For maintenance, check the clutch regularly for wear and tear. Since the clutch can handle high torque, it's built to last, but a visual inspection every few months is a good idea. Keep the clutch clean and free from debris. If you notice any unusual noises or a change in pedal feel, it might be time to have it checked by a professional. The Monoloc is a durable part, but if you make any major vehicle modifications, double - check its alignment. With proper use and maintenance, this clutch kit will serve you well for years.