No doubt his car is badazz !!

But to answer your question it's pretty much anything goes as long as you have stock firewall & front frame rails along with tire & weight rules...So now you have race cars with back-half's,carbon fiber/fiberglass fronts,doors and deck-lids along with lexan windows running against street type cars !!

Not enough heads-up MOPARS that will show up at one time without them !!