Hello all!
Quick question, I've been noticing a strange wind type fluttering noise while driving at highway speeeds. The best way I can describe it is it's like the fluttering wind noise you get in some cars when the rear windows are down. Any thoughts on what could be causing it? It just started.
All windows are up and the sun roof is closed. Oh, it seems to have started after I ran her this past weekend and we hit 140 mph.

Thoughts?

 

One of the plastic plates loose on the bottom of the car or a stuck walmart bag.

 

Ok, I'll have a look. But it's more of a deeper base sound but you never know.