Okay so there is an exhaust leak where the Dow pipe meets the exhaust. The exhaust side flange has an inch or so missing from rot, but the sound almost sounds like it’s coming from the exhaust in the back of the truck. You think that leak would be a possibility?I was gonna say that it might be the LBZ y-bridge coming apart but since it was doing it before it probably is somewhere else. Don’t rule out an exhaust leak either.