Yep replaced mine too with a pre-Ducati Performance, Gio.Ca.Moto set of front pipes bought new old stock years ago.
Not quite as intricate as a full spaghetti system but a much less restrictive join.
I'm not sure what the gain (if any) might be on this but the long since unavailable Sil-Motor spaghetti system used to quote a 5bhp gain all through the mid-range on a 900 motor.
