Following the initial production of the Ford GT, the automaker built two examples for testing and validation. This is believed to be the only one remaining in existence.
The GT comes with a bespoke ECU developed by Ford Powertrain Engineering specifically for this car. With a high-performance tune, it puts out 633 horsepower at the wheels.
A dyno sheet documenting those horsepower numbers comes with the vehicle, as well as a Ford GT Prototype/ECU mileage statement.
Find this 2006 Ford GT Prototype/Test Vehicle Coupe for auction at Mecum.