In 2003, Hemmings expanded its publication lineup with the launch of Hemmings Muscle Machines, a high-quality monthly magazine dedicated to old and new American-built performance cars. It features in-depth muscle car profiles and road tests, historical and engineering research, and restoration and general-interest technical articles as well as special departments devoted to the latest books and literature, model cars, parts and accessories, auction results, and all the new Detroit performance cars to come.