I’ve noticed it for a few weeks now and guessed it was the front flexpipe because the ‘webbing’ around that has slowly been disintegrating, but I took a look under Humdrum today and...
Huh....that’s not supposed to happen. It looks like the rear exhaust hanger has rusted and detached from the pipe, or possibly was a bit rust and got knocked by a rock or something I drove over that ripped it off because it was no longer very strong, I have no idea....it’s this hanger, at any rate:
From what I can tell, the leak is from somewhere around here:
My guess is that, with no hanger at the back the weight of the exhaust pulling down is pulling the clamp apart at that muffler and causing the leak....I’ll have to book it in to get that hanger re-welded or replaced in the next week...