Re: Humming noise when driving over 50 mph!?
Also could be that annoying BUZZ / HUMM from the heat shield aluminum dimply garbage that wraps above the mufflers... Then of course it might not be... LOL.
Impossible to tell unless we hear it... Put your video camera in the back hatch, record the noise, post the sound on youtube...
Also, do what AMGLOVER said, it will narrow down the problems...