This barn-find Ferrari Daytona is the only one of its kind ever made

Built in 1969 chassis #12653 was imported into Japan for its fourth owner in July 1971.

Ferrari's 365 GTB/4 "Daytona" was their last front-engined V12 supercar for decades.

The 365/4 was colloquially known as the Daytona after the 24-hour race at the Florida super-speedway.

Left in a barn in rural Japan for 40 years this amazing find will be auctioned by RM Sotheby's in September.

Ferrari's 365 GTB/4 "Daytona" was their last front-engined V12 supercar for decades (until the launch of the 550 in the 1990s) and it was a highly collectable beast.

But while they were rare, and the five alloy-bodied race versions even rarer, imagine stumbling across the only alloy bodied road version the factory ever built!

Left in a barn in rural Japan for 40 years this amazing find will be auctioned by RM Sotheby's in September, where it is expected to fetch more than $2.5mil despite experts saying it needs massive recommissioning work just to make it able to be driven.

Today it shows less than 37,000km.

It is expected to fetch more than $2.5mil despite experts saying it needs massive recommissioning work just to make it able to be driven.

It features many of the parts the race cars used.

Built in 1969 chassis #12653 was imported into Japan for its fourth owner in July 1971, passing through several hands before being stored in 1980. Today it shows less than 37,000km and is in the same spec as it was when Devo were telling people to "whip it good".

Chassis #12653 was actually the 30th Daytona built, and features many of the parts the race cars used like fixed plastic headlights, rather than the pop-up lights the regular production cars had.

The 365/4 was colloquially known as the Daytona after the 24-hour race at the Florida super-speedway the Italian marque has had so much success at.