Ok, I posted a while ago about the same issue, however, the sound has gotten worse. I have no idea where this is coming from, I can't tell. I can tell you that while listening the exhaust at the back, I could hear it from the exhaust too.

Here is the video, You can clearly hear it towards the end of the video. At the beginning it is kind of noisy.

VIDEO0014.mp4 video by diyar21 - Photobucket

Any ideas??

Thank you.