First off I apologize if some has posted this question before!Okay, so I have a greddy evo axle back. For the first few months, it never rattled. Well, eventually it started to rattle at idle and during low rpm. I came to the conlusion that the rattle is from the clamp that holds the greddy to the stock pipe, which it is. It wasn't loose as far as the bolt goes, so, I ever so slightly filed down a lip on the clamp so it would clamp tighter. The rattle isn't QUITE as bad, but is still driving me f-ing nuts. Long winded story, I know, anyone have a clue on what I should do?