I currently have a bassani offroad x with Mac lts & a 3 chamber flows.. Without the cats the bassani almost sounds like it rattles when it rev's up.. I know this is not an exhaust leak but actually the sound of this pipe. My question is, for thoes of you who have the dr gas, do you get this sound without cats as well? And how about the prochamber? I think I'm going to stay catless, but I want to get rid of this aweful rattle/extreme rasp of this pipe. Any suggestions?