A super-rare variant of an already-exotic American car is up for sale: the 2006 Ford GTX1 number 33 (of no more than 40) has been listed on Bring a Trailer

This red 2006 Ford GT went under the knife at Genaddi Design Group in Wisconsin for a roadster conversion that cost $38,000 in March of 2006, and the seller has the records to prove it, but Genaddi did more than just hack the roof off for this particular conversion.

2006 Ford GTX1

2006 Ford GTX1

Included were a carbon fiber roof panel replacement (with built-in t-tops and a plastic rear window), carpeted GTX1 floor mats, GTX1-branded Sparco race seats, and a convenience package including a flex cup holder and center console pocket.

Genaddi also went to great lengths to differentiate the GTX1's various components thanks to custom valve covers, door sills and a plaque bearing the GTX1's build order.

2006 Ford GT

2006 Ford GT

 

The original owner specced out the GT with red brake calipers and a race stripe and American flag delete, and a coat of MkIV Red paint. 

As one of the first 10 buyers to apply for the conversion, the original owner also got the Ford Performance upgrade thrown in for free. This factory-sourced package included a smaller supercharger pulley and remapped computer that bumped the GT's total output to 650 horsepower.

2006 Ford GTX1

2006 Ford GTX1

 

Around 4,000 first-generation Ford GTs were built, and fewer than 1 percent were known to have been sent to Genaddi to be converted into GTX1 roadsters, so this example is about as rare as it gets. 

The listing includes service records, the original window sticker, the Genaddi build sheet and order form, and a host of other parts and documentation.