I do have two stock A3 pipes lying around, and it sounds like they're closer in size to the Bat ones. I'm not entirely sure I want to get rid of both though. Part of me thinks they'd be handy to keep around for intakes even though there's no way I'm ever getting a 24 mm or bigger carb. Also part of me kind of likes how stupidly loud the baffle-less one is, even though the moped runs better with the other pipe. I could probably be convinced to give them up though, if you really thought they'd help.