mufflers are not a problem, u just have to buy the right ones, also you can bend a pipe around to fit if done by a competent exhaust shop. its also about having the right tips, they make ones that still have a large area, but are just flattened out to fit under the rocker area, although some rocker panel "dimpling may be neccessary". i have had no luck finding any other options as well. i probably wont do the side exhaust, i was just exploring the option. right now i have dumps, maybe tailpipes will be in my future. all i know is i need something, its too loud and it doesnt help having the exhaust empty right under the back seat area. makes for a lot of resonance