nah, idler pulley got replaced
But I don't think exhaust leak as such
I'm thinking a bolt without a nut, in the flange hole.. can't get out, and rings at some noise..
I need to get her ass up to look, but it's been cold, wet and snow and then we had blue skies this morning:

just wanted to go for a drive.
To be honest, the chirp is barely noticable.
It all ended back at the usual watering hole
Cause she does have a bit of a drinking problem :