i have 2 1/4" true duals back both sides with no cats and thrush mini-turbo mufflers there very small and great for bagged trucks then i have it coming up over the frame and dumping infront of both tires...
i have a stock exhaust and it dumps at the muffler, and it sounds like crap because i think the previous owners hollowed out my cat, but it doesnt hang that low, i shortened the hangers and its tucked up quite nicely
i've got 2 1/2" dual exhaust ,h pipe running through flowmaster hush power II then it will get dumped out right before each rear tire through some low profile tips.
I've got my exhaust setup routed to dump in front of my left rear wheel. The muffler is right behind the cab and it was originally setup to dump right after the muffler. I had to go through emissions though so I had to get a tailpipe put on...
I say you dump your muffler right after the cab before the axles. Just put a small downpipe on it so it does'nt spit at your rear... It will look clean havign that way IMO. No pipes anywhere...