Three ways to go about making a side-exit setup:
1. Use a standard offset inleft/center outlet muffler, put a 180* U-bend behind it, then a 90* elbow to put it out to the side. Looks weird under the car, potentially more restrictive than a standard rear-exit setup.
2. The Dynomax #17676 same-side inlet/oulet muffs like I used, just add a 90* elbow on each, plus an extension, and you're done. Looks kinda weird, though, unless you put some kinda groovy slash-cut tips on it, and it sounds kinda ugly behind an off-road X-pipe (however, it does sound VERY nice behind an off-road H-pipe - not as "poppy," more of an old-school Mopar kinda rumble).
3. Use a couple of 45* elbows right after the fllange off your X- or H-pipe, clamp/weld on some short and simple tube muffs (glasspacks, Race Magnum Bullets, Moroso Spiral Flows, whatever), and shoot 'em out the sides at an angle. Probably the least amount of ground clearance allowed, and HELLA loud, but probably the least restrictive exhaust you can make next to dumps, and you don't gag from the fumes pooling up under your chassis like you would with dumps. Probably best used on a car with a jacked-up rear for tall tires or something.
With ANY side-exit exhaust, you're gonna have to deal with a LOT of increased sound (not always a good thing - mine was obnoxiously loud inside, even with the windows up), ground clearance problems, and fumes drifting into the cabin at every single stoplight no matter which way the wind is blowing outside. You can tuck the exhaust up as high as possible to help with clearance, but then you're going to run into problems with the tailpipes hitting the floorboards and/or being in close proximity to the brake and fuel lines (you'd best be insulating/shielding them, in that case).
