Tests that i've seen have showed that bolting on a mandrel bent 4 inch turbo back kit doesn't do much for a stock or mildly chipped truck since it's not producing a bunch of power that would need to get out quicker. If you're just going for a couple of extra horses and don't want to spend big and get big power then just get a straight pipe or a muffler that will work with your current tubing. Otherwise you'll probably spend money you don't have to. I don't think Duras and Strokers are louder than a straight piped dodge though lol