Ferrari hasn't competed on the front lines of sports prototype racing since the 1970s – with one exception which was the 333 SP in the 1990s.
The Ferrari 333 SP was the product of a joint effort between Ferrari, its longtime racing partner Michelotto, and racing constructor Dallara. The car was designed specifically to take on the IMSA World Sports Car championship in North America. The design drew heavily on Formula One expertise, with a flat-bottomed carbon monocoque, pushrod suspension, and a 4.0-liter V12 that Ferrari somehow convinced the regulators was a downsized version of the road-going F50's 4.7-liter unit.
This particular Ferrari 333 SP was the sixth of only 40 examples and was never raced. The Rhode Island customer who ordered it pulled out, and it has since passed through the hands of three more – the current and last of which sent it back to Michelotto last year for a full restoration and Ferrari Classiche certification, after which it was properly tested on the Fiorano circuit but only has one hour on the rebuilt engine. Now it's consigned for RM Sotheby's Leggenda e Passione auction, set to take place at the factory in Maranello less than a month from now.
The last Ferrari 333 that RM tried to sell was Momo's Daytona/Sebring race winner, which apparently failed to reach its reserve price at Monterey in 2014. The year before the same auctioneer sold another example for $1.375 million, and we'd expect this one to sell for at least that much.
Have a look at the gallery to see the Ferrari 333 SP in full and check out the video which gives you a sense of the sound of the incredible Ferrari V12!