Well I got started on the retrofit yesterday. I ended up opening up not only the stock muffler, but the new Classic Cobra Pack as well. I wanted to forever end my question of what was in there. That included the new muffs too. That led to a couple of hours of muffler design research on the web. Well I have learned the following, so far.
I started with a 20" long x 2.5" I.D. Glass pack (Stock Kit Pipe) This is my car in stock form.
Stock tube removal
Whats in here?