The Magor Car Corporation was a New Jersey-based car builder, who from the early 1900s, concentrated on the manufacture of freight cars for international export. However, in 1963, the company was encouraged to give new consideration to the domestic market, based in part upon the success of Magor's aluminum designed freight cars. Previously, Magor had cooperated with Reynolds Materials and the Southern Railway to mass produce the first aluminum freight car for the U.S. market. In 1966, Magor introduced the 4750 cubic capacity aluminum covered hopper. Marketed as a car whose light tare meant more payload capacity, the Magor 4750 Covered Hopper which proved to be one of its most successful aluminum-based designs.