... packing Valve role is responsible for input to the engine fuel and emissionsWe are the professional manufacturer(factory) that ... EXHAUST VALVE IS SUH3(4Cr9Si2).Engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS,DAF,DAIHATSU,DAEWOO,FORD,FIAT,HILLMAN ... plating , surfacing nitration treatment.Of course , we can produce engine valves according to your samples .MARK IN / EX GUNES REF ...