The only way I see to mount a hitch receiver and retain the exhaust and look of the rear end would be to mount it behind the plastic bumper cover and cut a single square into the center of the cover for the receiver. I've seen the back of this car with the cover off and it would be fairly easy to do.

The trick would be to get enough solid mount point and keep it close enough to the steel so as not to interfere with the bumper cover.

I had though about this too since I can't carry four tires/rims and additional tools in my SRT6 to the track. I may have to trailer it down. I'd rather drive it...