This is made by CNC to ensure the consistency of the spring's workload, and also with the technique of shot blasting to guarantee the service life to be more than 25 million times.

Valve spring valve seat and ensure timely close fitting, prevent the valve in the engine vibration occurs when beating, destroy the seal. The installation pretightening force when installing pre compression produced is used to overcome the inertia force and the transmission valve in the process of eliminating the gap between the transmission parts due to the inertia force generated, to achieve its function.