Presented at the 1966 Paris Motor Show and equipped, as its name suggests, with four overhead camshafts, the 275 GTB/4 was the first road-going Ferrari so equipped. Although it had the same dimensions, its V12 differed in many respects from the single-shaft engine in that it had a bank of cylinders (including the presence of a dry sump). Fitted with six twin Weber carburettors, it produced 300 bhp at 8,000 rpm, mated to a 5-speed gearbox. Compared with the previous evolution of the GTB, the GTB/4 was recognisable from the outside by the central boss on its bonnet. Its career was short-lived due to the closure of the American market because of anti-pollution standards.