... are suit for gasoline, diesel, CNG auto engine models and motorcycles.trusted material of engine valve for Structural Steel, such as 40Cr / Martensitic ... , SUZUKI, TOYOTA, YANMAR,...KOREA series---DAEWOO, HYNDAI,...EUROPE series---BENZ, B.M.W, DEUTZ, FIAT, PERKINS, PEUGEOT, RENAULT, SCANIA, VOLKSWAGON, VOLVO ...