... withstand high temperature,resist deformation and also called Martensite. Exhaust valve is high exhaustion strength,withstand high temperatures, resist deformation, ... ,KAWASKI,KIA,LADA,LEYLAND,LISTER,MAZDA.BENZ,MITSUBISHI,NISSAN,OPEL,PAYKAN,PERKINS,PEUGEOT,ROVER,SUBARU,SUZUKI,VOLVO,VOLKSWAGEN AND ... SO ON. 8,OEM and sample service 9,Our brand is OSVAT and QUEEN,we have registered them ...