... by our team of experienced professionals, our range of engine values always stand taller in terms of durability and performance ... INLET VALVE IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). Engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS ... chromium-plating , surfacing nitration treatment.Of course , we can produce engine valves according to your samples . MARK IN / EX GUNES ...