[Blackbirdws6]

My car was tuned with the mufflex so I can't comment on the leaning out comment/question. Nice to see someone has good luck with fitment of new parts. Very jealous.

As for the exhaust system merge, that's essentially how mine is. I would personally ditch the cutouts at this point. The magnaflow muffler is not going to do much to quiet her down and you have plenty of flow happening here. Just a thought.

Oh and for wrapping things, I'd recommend getting them coated. It will be more expensive but a couple folks have commented that once you get some oil on them, it never really burns off completely. Granted you've fixed your leaks but we know how things go. I'd leave it bare or get it coated.