After about 90 fligts (some leans) on my os 1.6/aeroslave black magic the exaust noise changed ,at first I tought that a slicone coupler has broken but after i removed the belly I noticed that both couplers where ok, I then cheked the pipe and I discovered that if I shake it something inside moves and clunk.It means that I need anew one or the pipe can be repaired?