The first Superformance GT40s to be built are replicas of the famous Ford GT40 MkII A that finished first, second, and third overall at the Le Mans 24 Hour Race in 1966. The Superformance GT40 differs from other Ford GT40 replicas in that it is the "only one to be built with a monocoque chassis that is an exact replica of the original". In fact, over 90% of the SPF GT40's parts are interchangeable with the original MkII A. The Superformance GT40 is so close to the original that it is currently being evaluated for historic racing eligibility. Some major differences between the two cars include the addition of a hidden air conditioning unit, modern brakes, and a conversion to left hand drive layout. Right hand drive, non-airconditioned versions are also available, marketed as the GT40/R. The Superformance GT40 has the "Gurney bump" which can be ordered as an option for taller drivers.