OK, how about undercar exhaust with a 'cut out' pipe exiting just in front of the rear wheel? Capped for the quick 'unbolt' the cap and GO. Or, to be really cool, an automatic slide mechanism operated from the drivers seat! Then add a spark plug and some propane for 'flames', maybe some green neon lights under the frame, wait, I'm getting ahead of myself.
Seriously, and undercar exhaust looks great, it's a good call for those that like that approach.