... factory) that produce all kinds of engine valves,we have motorcycle valves, diesel engine valves ,auto engine valves and so on. we are a ... (40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). 3. our engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS,DAF ... 4. We have all kinds of valve techniques, entire material valves, double mttal friction welding , small soldering terminal pin, small ...