I have the stock axle back exhaust but I'm thinking of getting an X Pipe section to replace the muffler that is shared by both pipes where the pipes shrink to about 2"s in diameter. But I want to keep the two resonators that are further back. It seems like this area would be a restriction (since the pipe diameter downsizes in that area also). Questions: 1. anyone done this yet? 2. could any muffler shop fabricate something along the lines of what I'm suggesting here, i.e., just take out the muffler and replace it with a short X-Pipe section that maintains the same pipe diameter as the rest? 3. would this help out the rwhp 4. noise increase much or not really?