X-1 Mustang The X-1 Mustang is named after the first aircraft to break the speed of sound. The Mustang was one of two custom-built cars commissioned by the Air Force Recruiting Service in 2009 for its Project Supercar recruiting campaign. Built by Galpin Auto Sports of Van Nuys, Calif., this fully customized Ford Mustang showcases U.S. Air Force ingenuity, state-of-the-art technology, and innovation. The cabin is styled after a fighter cockpit, with an ejection seat in the center and a short shifter, a flight stick, and an advanced instrument panel. Other features include a concealed, motorized steering wheel, custom foot pedals, GPS transponder, and night and thermal vision displays. The X-1 Mustang was powered by a 500-horsepower, 4.6 liter engine. The car toured the U.S. for a decade with the Air Force Recruiting Service educating the public on opportunities for officers and enlisted Airmen.