Part it out?? Are you getting rid of the car all together?
Anywho, to try and answer some questions.
Yes, the extreme coating will help w/ protecting against road elements. For $40.00 more, it's not a bad deal at all. It's not QUITE as high quality as "JET HOT", but is similar. I couldn't warrant getting the headers, shipping them to Jet Hot and pay 2x what MSDS wants, then have them shipped back to me. Then again, I was also racing against the clock to get my motor finished.
No, you don't HAVE to have your y-pip optimized. People are basically removing the V bend in the y-pipe and replacing it with a U bend for a little better flow. Definitely not needed though.
Emissions - I live in Indiana and we don't have emissions testing. Might want to look into what your state requires and how they do their testing.
