Located in Muskegon, Michigan, we are a multi-location, fully integrated manufacturer of aluminum die castings, zinc die cast ... ings, mechanical assemblies and injected molded plastics. Port City Group is dedicated to delivering the highest quality and best value products to our customers, on time. We are committed to continuous improvement through our Quality Management Systems in order to exceed the expectations of the customers we serve. See our complete capabilities and equipment list, as well as our Engineering advantages. read more