The GTX was invented by Tim Tyler of Australia, in his effort to race the GTC against the European unlimited style ceramic eurosport cars. Tim cut the main rails in hopes of speeding up the car, and found that it not only did that, but he was able to break track records and out-run the finest european cars costing 2 to 3 times as much! and the GTX was born! Now in production, it is legal for 2005 GT-12 racing. Maybe an un-fair advantage, but let them cry!!!