Hey, i just put a dual exhaust on my NA and ill let you know whats in it.......It goes from a long tube header, into a punched out cat, then into a y-pipe, back to two Dynomax Super Turbo mufflers, then out the back. Its really throaty sounding if you know what i mean. Deep in other words and im sure it will sound better once the mufflers get broke in to. The cost of the mufflers were 34.99 out of jegs, and it took about 16 feet of pipe and that was roughly 120 bucks for stainless. and i had the header but they run like in the 150 range. but i like the sound of it, its definetly not ricey it sounds more like a stock 302 engine which is pretty damn good for a NA 2.3L engine so thats my opinion man.