Viper 3-Disc Steel Clutch Drum - Heavy-Duty FCDC-SD3 - 4-Cycle RacingHarness maximum torque transfer and eliminate clutch slip with the Viper 3 Disc Steel Clutch Drum, a critical upgrade among racing go kart engine parts for high output setups. Engineered specifically for multi disc configurations, this heavy duty drum (MPN: FCDC SD3) minimizes distortion under extreme shoe pressures, ensuring instantaneous power lockup off the apex. When you are pushing a high horsepower four cycle engine to its absolute limits,