Like many GTDs, these are far from standard cars. They have been prepared for racing (in this case circuit) and have many significant modifications to the cars such as:
* Brodix aluminium heads
* Tilton pedal setups
* Rose jointed suspension
* Dry sumps
* Lightweight bodies
* AP Racing brakes
* Nascar carbs
* Fuel cells
* Koni dampers
etc
and put out more than 500 (real) BHP.
I would say that is one hell of a lot of car for that price. I have already invested that kind of money in my car and it is certainly not up to their spec yet.
Martin