The Mid-Am Racing Series, formerly Mid American Stock Car Series, is an elite sportsman traveling stock car racing series in the Midwestern United States. The cars are based on a 108" metric stock frame, less costly suspension parts and a maximum of 358 cubic inch engine. The car's roll cage and chassis were made of a design very similar to the same chassis a previous design of NASCAR cup chassis, but have also included more modern safety features such as plated door bars and the "Earnhardt bar[broken anchor]" which runs from the roof to the dash. The series runs primarily on paved racetracks but also appears on dirt and road courses. The series is the highest form of racing available to sportsman-style, GM metric chassis stock cars.