Solid Mass Flywheel Kit, also called 4-in-1 Conversion Kit, is an alternative solution to Dual Mass Flywheel Kit.
The SMF Kit which was developed as an economical alternative to DMF for Aftermarket , is now widely used as an original equipment.
DMF places a damping system between its two main components to dampen vibration while allowing torque transfer.
To achieve similar results, SMF kits include the damping system as part of the clutch plate design instead of the flywheel.
SMF flywheel does not need to be replaced every time. During repair periods, users only replace the service kit (Cover + Disc + Bearing)