I can post pictures of the flanges this evening, but apart from a diameter difference, everything else appears to be the same. I have been trying to flatten/ reshape the joint collars that were on it but as it isn't very thick metal it is weakening which is why a fabrication or replacement of new ones is my preference. The OEM Honda joints I got were too thick to fit into the flanges between the header pipe as they are a stepped setup, and nothing else on the exhaust indicated that it was anything other than a modified stock setup (ie no markings, stamps, labels, etc). That suggests to me that this is more than likely a modified aftermarket setup so there must be other people out there who have a similar setup, like the Kerker or MAC which also use a single style joint. I appreciate your suggestions but they haven't answered my question in the capacity I am looking for. Yes I have the original collars which can be renewed to work, but they will not last as they are already old and weakening. I am looking for someone who had this same experience and fabricated a set, like Benelli, or someone who sourced suitable replacement.
