... so on cars 2.stocks 3.delivery within 5days commins valve ,exhaust valve ,engine valve1.We are the professional manufacturer(factory) ... 40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). 3. our engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS,DAF,DAIHATSU,DAEWOO ... ,VOLKSWAGEN AND SO ON. 4. We have all kinds of valve techniques, entire material valves, double mttal friction welding , small ...