On 1 March 1970 the 914/6 was homologated by the Fédération Internationale de l'Automobile (FIA) for Group 4, Special Grand Touring cars. That same month two cars were sent to the Targa Florio for testing, not as competitors. These were the first two 914/6 GT cars built. Externally the cars were distinguished by squared fender flares that were the full depth permitted by FIA rules. The chassis was reinforced with three welded plates on each side. For rally applications a stone guard protected the power-train and a stone shield did the same for the front of the car.