... manufacturer(factory) that produce all kinds of engine valves:motorcycle valves, diesel engine valves ,auto engine valves ,etc. We have exported many years ... to many countries.We have passed ISO 9001.2. Our engine valve kind is complete , the quality is frist-class, the ... IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). 3. our engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS ...