... for input to the engine fuel and emissions. INLET VALVE IS SUH3(4Cr9Si2) ; EXHAUST VALVE IS SUH35(21-4N), normal material ... : INLET VALVE IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). Engine valves are suitable for TOYOTA,AUDI, ... ROVER,SUBARU,SUZUKI,VOLVO,VOLKSWAGEN AND SO ON. We have all kinds of valve techniques, entire material valves, double mttal friction welding ...