Clutch Masters 07-10 BMW 335 3.0L N54 Twin-Disc (Race) Clutch Kit w/ Aluminum Flywheel03055 TD7R A 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