Since then, a number of other wealthy individuals have followed suit, albeit tending to order just a solitary creation rather than a dozen at a time. In early 2005, American movie writer and director James Glickenhaus came up with the idea of having Pininfarina create a cutting edge supercar inspired by the legendary Ferrari sports prototypes of the late 1960’s. The basis would be Ferrari’s critically acclaimed Enzo and the project was given the green light in March 2005. Pininfarina immediately set about sourcing an unregistered US-spec Enzo and tracked a 2003 model down at Ferrari of Beverly Hills in California. This was then shipped over to Pininfarina’s design studio in Italy where Glickenhaus also dropped off his 1967 Ferrari 330 P3/4 to act as inspiration for the team of designers. Known as the P4/5, the entire project was given Ferrari’s blessing and the Maranello factory even offered some technical support.

Pininfarina's team was led by the original Enzo creator, Ken Okuyama, who rightly wanted to steer clear of producing just another retro cliché. To begin, every body panel and most of the interior was discarded, Pininfarina then focusing considerable attention on the P4/5’s aerodynamics. The ride height was dropped by 1.5 inches and a shorter front overhang utilised thanks to ditching the Enzo’s twin front radiators in favour of a single horizontal unit that also improved the front-end crash rating. A half-inch gurney flap was added to the adjustable front spoilers. The original active underbody aerodynamics of the Enzo were retained albeit with re-profiled venturi tunnels, all of which resulted in less drag and more downforce. The bodywork was manufactured entirely from carbon-fibre and featured spectacular gullwing doors, distinctive LED lights and a host of other nice details. Custom 20-inch wheels (9.5 wide at the front, 13 at the back) were each milled from a solid block of alloy and gave a wider track than the original Enzo. 

The interior too was heavily reworked, Pininfarina fitting a full roll cage, racing seats trimmed in sixties-style fabric and a simplified dash with a digital display. There was an improved air-conditioning system, worldwide GPS, an iPod Nano stereo and an F1-style fire system with no stored pressure to allow the car to travel by plane. As with the original Enzo, swathes of bare carbon fibre were evident throughout whilst the plumbing and wiring were reworked for easier servicing and a reduction in weight. To keep the P4/5 US legal, no modifications were made to the standard six-litre V12 engine, the F1-style transmission or the carbon fibre monocoque chassis. The overall weight saving came in at 270kg which meant 0-62 mph was cut to 3.55 seconds, top speed rising from 217mph to an estimated 225. Pininfarina released the first pictures of the $4m creation on July 29th 2006 before it went on to make its public debut at Pebble Beach on August 18th. Afterwards the P4/5 returned to Italy to undergo high speed testing before being displayed at Paris Salon at the end of September.