The Ford GT is the Big Brother to the Ford GT40, a high performance sports car and winner of the 24 Hours of Le Mans four times in a row, from 1966 to 1969 (1966 being the Mk II, 1967 the Mk IV, and 1968-1969 the oldest chassis design, the Mk I). It is so far the only racecar built in America (Mk IV only) to win overall at Le Mans (1967 Mk IV).
Also some great overall footage of the race event in Texas with Music from AC/DC Shoot to Thrill