LuK: Don¿¿¿t gamble ¿¿¿ stay with the original LuK DMF! The LuK DMF prevents damages solid flywheels may cause. The LUK Dual Mass Flywheel (DMF) is individually fine-tuned for every type of car. The risks of using solid flywheels are numerous ¿¿¿ from increased wear of engine mounts through gearbox failure to damaged crankshafts.