Quote:
Originally Posted by CHRIS DAMSCH
I believe the earlier backdrafts have slip fits for the header to sidepipe connection. It could be the sound of the exhaust leaking there. A couple of our local guys with the backdrafts had flanges made up so the connection can be sealed.
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Would it do the same thing if you really worked the connection hard to get a super tight fit? Maybe wrapped the pipe with something so it would hit the sides? Wouldn't a loose, sloppy fit rattle and flutter?