Hey guys, I'm going to put an intake on my H3 and want to modify the exhaust. Instead of putting the money into a cat back system, I was thinking about just replacing the muffler with a flowmaster. When I looked underneath it looks like I have anotherthinner muffler right after the cat...should I replace that one two or could I replace it with a straight pipe and just keep the one flowmaster? Any thoughts? Does anyone know the diameter of the stock exhaust?