If youre feeling ambitious, I would try just cutting the flange off and using an adapter, clamps, and some of that exhaust putty stuff. It might remove some practicality for future cat replacement but it could seal. It might be tricky getting the adapter on the cat due to the way its shaped though. Just a seggestion.
Looks like you have the same type uel header I'm running. Love the sound, but mine keeps blowing the gasket between it header and convertor section. Pretty annoying, and I'm yet to one that will properly seal to the smaller flange.
Due to the fact that my redneck repair on my midpipe-axleback connection is starting to fail again, I might try just that. Im going to try some exhaust putty first to see if that works, as pointed out before RTV silicone may not be the answer to everything after all
Edited by pginter96, 26 July 2014 - 06:40 PM.