So I have my exhaust in finally. Headers, highflow cat, DNX mid-pipe , and new OEM muffler (again ) It has all the stock rubber hangers, I thought it would be better and everything is nice and snug. Before I replaced the exhaust there was NO vibration. I have no clue of what it can be. Anyone have a clue?

 

maybe the new muffler doesn't fit in the hangers just like the old one did...or maybe the old just kind of found it's 'spot' in the hangers and the new one hasnt yet...just maybe