... 2. all kinds of OEM intake & exhaust valve 3. ISO 9001:2000 engine valve 1.We are the professional manufacturer(factory) that ... ), normal material: INLET VALVE IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). 3. our engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW ... HINO,HONDA,HYUNDAI,ISUZU,KAWASKI,KIA,LADA,LEYLAND,LISTER,MAZDA.BENZ,MITSUBISHI,NISSAN,OPEL,PAYKAN,PERKINS,PEUGEOT,ROVER,SUBARU,SUZUKI, ...