Intake and exhaust valves use for MAZDA. Supply all kinds of OEM engine valves ... are intake valves and exhaust valves use for MAZDA Seriesit's OEM NO.:B541-12-111Material:21- ... 4N,40Cr,or according to client's request.Surface treatment :chromed or nitrided.it's also ... VW,BENZ,SKODA,OPEL,DAEWOO,TOYOTA,HYUNDAI,NISSAN,MITSUBISHI,MAZDA,MAN,KIA,FIAT,PEUGEOT,RENAULT,ISUZU,PERKINS,CUMMINS, ...