This ACT 6-Puck Rigid Race Disc is a high - quality replacement for your Subaru STI, WRX, and Legacy GT. It fits 2004 - 2021 Subaru STI, 2006 - 2021 Subaru WRX, 2005 - 2012 Subaru Legacy GT, and 2006 - 2009 Subaru Legacy GT Spec B. Note that it's a 240mm upgrade and requires an ACT 240mm pressure plate and flywheel. If your ACT 6 - puck Rigid Replacement Disc for the Subaru STI (6240018) is worn out and you don't want to buy a new clutch kit, this replacement is a great choice. Made with high - quality ceramic friction materials, it offers a harsher disc engagement but faster shifting. It features top - grade rivets for a secure fit, carefully selected for maximum strength. This 6 - pad rigid race disc is ideal for larger clutch sizes to absorb more heat and ensure smoother engagement. It has an aggressive feel with quick shifts and increased gear rattle. Recommended for high - horsepower street or race use, it has a high burst strength and can hold 28% more torque than typical organic materials. It comes with a limited retail warranty and ACT's general installation instructions. Remember, ACT's race discs are too aggressive for daily driving. They cause harsh engagement, judder, and noise when taking off from a stop. Use an organic disc on the street for a smoother experience. To know when to replace the clutch disc, measure its thickness. Most new discs are 0.312 - 0.315 inches (7.93 - 8.00mm) thick and should be replaced when they reach 0.275 inches (7.00mm) or less. Some applications start at 0.332 - 0.335 inches (8.43 - 8.50mm) and need replacement below 0.295 inches (7.50mm). Measure with a micrometer, and if the lining rivets touch the flywheel or pressure plate, replace the disc. Using a disc outside the pressure - plate's working range can lead to poor results.
Using this ACT 6 - Puck Rigid Race Disc is straightforward. First, make sure you have the right ACT 240mm pressure plate and flywheel as it's a 240mm upgrade. Follow ACT's general installation instructions carefully during installation. For daily use, don't use this race disc. It's designed for high - horsepower street or race settings because it has an aggressive engagement that can cause discomfort on the street. When it comes to maintenance, regularly check the disc's thickness with a micrometer. If it gets too thin, replace it as described in the product details. Also, keep an eye on the lining rivets. If they touch the flywheel or pressure plate, it's time for a new disc. This way, you'll ensure the best performance and longevity of your clutch.
