Below is a list of Automotive Castings manufacturers from Rock Falls, Illinois. Die cast parts and products are extremely common within the automotive industry. Vehicle components often fit the design requirements of die castings and need a lightweight yet strong metal alloy to work with. Die castings made of zinc and aluminum alloys are often used in vehicle manufacturing because they are lightweight yet strong. By choosing these alloys, vehicles are faster and more efficient because their overall weight is decreased, which leads to less fuel consumption and higher miles per gallon.