Fitment: This ACT 6 - puck rigid race disc fits 2004 - 2021 Subaru STI, 2006 - 2021 Subaru WRX, 2005 - 2012 Subaru Legacy GT, and 2006 - 2009 Subaru Legacy GT Spec B. Note: It's a 240mm upgrade and requires an ACT 240mm pressure plate and flywheel. Features: If your ACT 6 - puck rigid replacement disc for the Subaru STI is worn out, this replacement is a cost - effective choice. Made with high - quality ceramic friction materials, it offers a 6 - pad rigid race design. The engagement is harsher but shifting is super fast. It uses top - grade rivets for secure fastening. This disc is great for larger clutch sizes to absorb heat and ensure smoother engagement. Feel: Aggressive engagement, quick shifts, and a bit of increased gear rattle. Recommended Use: Ideal for high - horsepower street or race use. ACT Difference: It has high burst strength and can hold 28% more torque than typical organic materials. Manufacturer Warranty: Comes with a Limited Retail Warranty. Installation Instructions: Follow ACT's General Installation Instructions. FAQ: Can it be used for daily driving? No, ACT's race discs are very aggressive. They cause harsh engagement, judder, and noise when starting from a stop. They're only for professional race settings. ACT recommends organic discs for street use. When to replace? Most new discs are 0.312 - 0.315 inches (7.93 - 8.00mm) thick and should be replaced at 0.275 inches (7.00mm) or below. Some Audi and BMW applications start at 0.332 - 0.335 inches (8.43 - 8.50mm) and should be replaced below 0.295 inches (7.50mm). Measure with a micrometer. Puck discs are measured as is, while organic street discs need the engagement cushion compressed. Replace the disc if the lining rivets touch the flywheel or pressure plate.
Using this ACT 6 - puck rigid race disc is straightforward. First, make sure to follow ACT's General Installation Instructions carefully. When installing, remember it's a 240mm upgrade and you must use an ACT 240mm pressure plate and flywheel. For use, keep in mind that this disc is designed for high - horsepower street or race situations. The engagement is aggressive, so expect quick shifts but also a bit more gear rattle. It's not suitable for daily driving as the harsh engagement can cause judder and noise when taking off from a stop. To maintain it, regularly check the thickness of the disc. Use a micrometer to measure. If the disc reaches the recommended replacement thickness (0.275 inches or below for most, 0.295 inches for some Audi and BMW applications), it's time to replace it. Also, keep an eye on the lining rivets. If they touch the flywheel or pressure plate, replace the disc right away to avoid poor performance.
