The Ferrari 312 was the designation of the 3 litre V-12 (hence 312) Formula One cars raced by the Italian team from 1966 to 1969. Designed under the leadership of Mauro Forghieri, there were two distinct variations using this designation, the 1966 version and the completely different 1967-69 version. The '66 cars carried on the chassis numbering sequence from the previous year's 1.5 litre cars, while the '67 cars began a new sequence at 0001. To avoid confusion, the cars are commonly referred to as 312/66, 312/67 etc.