My guess would be a hatchback but it needs a wing or something to give it less of an 80's BUBBLE look lol.

Interesting idea with the exhaust. I wonder if this adds more horsepower or just carbon monoxides the passenger to death ;-)

 

lol, its turbo'd. so less exhaust means the turbo spools quicker. people usually have a cut-off that allows them to switch between a full exhaust and a bumper (or hood) exit like the one in picture.