Surface Treatment:The surface of the spring is oxidized black to prevent the surface of the spring from rust and corrosion,and has a certain lubricity,which can reduce the friction resistance of the spring.
Excellent Operating Performance:The enhanced exhaust valve spring has higher elasticity and better performance,and effectively improves the exhaust efficiency of the engine.
High Durability:Special treatment and durability testing ensure the stability and durability of the spring under high temperature and high speed working environment.