Clutch Masters 06-10 Acura CSX 2.0L Type-S Triple Disc 7.25in Upgrade Kit (Must Use FW-037-TDS)08037 3D7R X Description Available Stages: Street and Race (TD7S) 1 ceramic rigid disc, and 1 fiber tuff rigid disc Race (TD7R) 2 ceramic rigid discs The Clutch Masters FX725 is a 7. 25" (184mm) Twin Disc clutch and is the ultimate in twin disk performance for engines transmissions with smaller bell housings that are focused on drag racing. Clutch Masters FX725 Twin Disc systems are developed from decades of experience in drag racing. Because of the