Aluminum Flywheelby Clutch Masters Clutch Masters Flywheels are designed and tested to ensure the safety and quality of every flywheel. Years of R&D has given us the knowledge and firsthand experience to choose wisely the best material to manufacture flywheels that will surpass your expectations. Depending on the application, the majority of Clutch Masters flywheels are made from 6061 T6 Billet Aluminum, 1045 or 4140 Billet Steel. Clutch Masters Flywheels are SFI Certified meeting performance standards for the automotive and motorsport industry Please Note: For Clutch Masters Twin Disc setups only. Features Clutch Masters Aluminum Flywheel Benefits Light-weight for improved performance and Quicker Rev\’s (Aluminum Flywheels) Consist of a replaceable heat shield (friction surface), eliminating need to resurface flywheel Reduces turbo ?lag? in turbo-charged engines Increased supercharger efficiency due to less drag on the crank Improved mid-range torque in naturally aspirated engines CNC Machined and balanced SFI Certified Applications 2009 – 2012 BMW 135i What\’s In The Box? 1 – AluminumFlywheel Warranty Manufacturers Standard Warranty