The Aston Martin DB4 GT made its premiere at the 1959 London Motor Show. The car was designed by Aston Martin and used the Superleggera body frame system - aluminium panels on tubular support frames - produced by Carrozzeria Touring of Milan. Although similar to the Aston Martin DB4, the differences added up to a very different motor car.
Five inches were chopped off the original Aston Martin DB4 wheelbase, making the GT easier to handle on a race track and reducing the overall weight; the engine was equipped with new twin-plug head and 45 DCO Webers, which increase power output to an impressive 302 bhp. The Aston Martin DB4 GT was the first of many Aston Martin's to use the cowled headlights.
Source: Wikipedia (original)