Originally Posted by Brabs_Weather
I had a the vibration or rattle sound 1st-2nd 3rd-4th, but not so much any more. It was very annoying sounded like a metal shroud rattling. So the other day I removed the resonator tube from under the AirBox and the noise was gone. I reinstall and hit it and sure enough it was vibrating against the sub-frame. Put some foams in between and eliminated the rattle. There is another somewhere but i think it is the heat shroud under the catalytic converter. Gonna add some sound damning material to that soon.
Mine isn't a rattle at all but rather a low frequency vibration through the pedals at around 1900 engine rpm. Just dropped it off at the dealer and the advisor said something about engine mount equalization. I'll post what they say at the end of the day.