So I have a Mac Catted Pro Chamber that the passenger side cat is starting to go out and rattle like a damn BB in a tin can. So I was going to buy a new Catted X pipe but in the mean time I threw the stock H pipe on because the rattle was driving me crazy. So I put the stock piece back on and I LOVE the sound. I think it is a much deeper sound. Now I am not even thinking about buying a new midpipe. Very strange I know but I thought I would share.:beer: