According to gt-eins the KTM X-Bow GT4 has the potential of a GT3 car without all regulatory restrictions.
The car is racing with 150 kg ballast, the engine could have 360 HP and 7200 rpm and is being limited at 320 HP and 5000 rpm. It also has several aerodynamic restrictions too.
I would like to see this car unrestricted, in one of the many second line series that accepting not homologated GT3 cars.
http://www.gt-eins.at/cms/index.php?...10593&Itemid=1