belo pipes

[Nilao]

A leaking bellows tube won't cause loss of boost. Will cause a lot of smoke under the cab during a regen. If you look under the passenger floorboard area you will find a braided wire mesh that covers the bellows area. It's main purpose is to allow the engine to move independent of the exhaust pipe. If it has a hole in it I would also expect to see failed regens.

PS Mine was leaking in 2 places and would only smoke during a parked regen. I had no loss of boost pressure as the bellows is after the turbo and all the exhaust has already past the turbo vanes.

Added picture of the bellows pipe.