... ,fuel injection housing, gear houing Instead of using sand as the mold material, a metal is used ... include gears, splines, wheels, gear housings, pipefittings, fuel injection housings, and automotive engine pistons.1. Cylinder2.Gear Housing3 ... . Intake mainfold4. Fuel injection pump housing5. Pipefitting Cylinder, fuel injection pump housing, gear housing, intake mainfold ...