... IS SUH3(4Cr9Si2). 3. our engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS,DAF,DAIHATSU,DAEWOO,FORD,FIAT,HILLMAN ... chromium-plating , surfacing nitration treatment.Of course , we can produce engine valves according to your samples . 5.if you are interested ... the same to your samples. If you don’t have original samples, ok, no problem, we can produce products according to ...