The title asks the question I'm pondering, because I'm without them. Its a sort of cone that fits within the connection between the original Ducati silencers and the exhaust pipe. From diagrams I have a hunch it is reducing the effective tube diameter at that point. Could it be for, E.g. Intended to restrict flow, or intended to increase silencing effect, or to increase velocity through the silencer and hence backflow and hence power..... etc.. Cheers, John
