The Ford GT has been one of the most significant supercars to come out in the last couple of years. But with just 250 being made, and sale strictly after approval from Ford, it’s hard to get your hands on one, even if you have the means to shell out $400,000. Here’s your chance to own an even more special supercar from the Blue Oval. The Ford GT prototype CP-1, or Confirmation Prototype 1, the first fully-functional prototype built in 2003 as part of the previous generation GT’s development, is set to go under the hammer this month.  as part of the all-new GT’s development phase.

Put up for sale by Russo and Steele Collector Automobile Auctions in Scottsdale, Arizona, the prototype bears VIN no:004, which means it was the fourth GT mule made overall. It’s also the first GT tester to be equipped with an engine, drivetrain, and full interior, as opposed to the first three, in red, white, and blue, which were just static show cars.

Bought in 2008 by collector and author “GT Joey” Limongelli, the CP-1 has many components that didn’t make it to the production models, including silver trim rings on the seats, an all-aluminium headliner, two quick-release valves connected to the fuel tank that allow quick changes of fuel grades, a set of experimental exhausts with a “sniffer pipe” that allowed the engineers to determine emissions during testing, and a lightweight carbon-fibre rear clamshell, which alone cost approximately $45,000.  Moreover, the CP-1’s engine is fitted with a black supercharger and valve covers, which were replaced by a silver blower and traditional Ford Blue valve covers in the production cars. And to top it all, the car bears the signatures of 13 members of the design and development team, including Bill Ford and Carroll Shelby.

While all this sounds exciting, there’s a catch, and huge one at that. Before it was sold in 2008, Ford installed a chip in the engine that limited the car’s top speed to a woefully low 8kph. This means, despite having a proper powertrain, the CP-1 is essentially just a show car like its earlier siblings. But it will still make a great buy for someone looking for historical significance than performance.