... size C. ISO/TS16949 approved About material of spring for valve spring Our spring have high elastic limit and fatigue resistance ... does not reduce the elasticity. About usage of spring for valve spring Valve spring is made of steel wire spiral coils, each ... , Nissan, Mitsubishi, Mazda, Suzuki,Subaru, GM, Chrysler, Ford, Opel, Audi, Mercedes-Benz, BMW, Volvo, Citroen, Hyundai, Skoda, Peugeot, and so on ...