Re: 5" Exhaust Vibration
My 2011 has a 5" TBE that is at least five years old, likely far older.
When I bought it almost a year ago, it had a chrome tip on the exhaust, which was getting some rust, and drew far too much attention, so I took it off.
It never rattled at all prior, but as soon as I took the tip off it began the same at low idle intermittent rumble/rattle.
I've climbed back and forth on multiple occasions, it's not hitting anywhere!
The V-band is something I'll try, after soaking it with some liquid wrench.
Frustrating for sure!