1.Forge steel, ductile casting iron. 2.Asopted with high frequency. 3.Best ... for racing car ,1.Cankshaft is made of iron casting, casting and forged type. High frequency, its work craft is ... technology.heat-treatment process3.Type for different gasoline,diesel, CNG engine, please check the follow. 4.Packing details, cartoons, ... series4.210″,4.250″,4.500″ 350 racing car engine casting crankshaft