The GTX1 is a modified Ford GT. The conversion/modification is done by a company called Genaddi out of Wisconsin. They have an option list you can check off. The main thing they do, is cut the roof, turning the car into a roadster. There is also a performance upgrade of 150 extra horsepower through replacing the supercharger pulleys. They also change out all the decals to read "GTX1". You can also change the stereo, put in Nav, rear view camera, they also offer suspension and brake upgrades.