... engine valve 1.We are the professional manufacturer(factory) that produce all kinds of engine valves,we have motorcycle valves, diesel engine valves ,auto engine ... material: INLET VALVE IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). 3. our engine valves are suitable for TOYOTA,AUDI, ... ,ISUZU,KAWASKI,KIA,LADA,LEYLAND,LISTER,MAZDA.BENZ,MITSUBISHI,NISSAN,OPEL,PAYKAN,PERKINS,PEUGEOT,ROVER,SUBARU,SUZUKI ...