Yeah that site is actually one of the first things the salesman sent me. It just isn't 100% clear on this part though...
So it looks like according to that info site they all come with "Dual Chamber Exhaust Tips". Then as a optional add on "Dual Chamber Exhaust - Dealer Installed (Post Title)"
So maybe it has either Roush aftermarket bought through AM or maybe the dealer installed option with the factory exhaust in the trunk.
I guess I really just need to take a little 2hr drive and take a look myself to see what is going on if I decide to move further in this direction.
Thanks for responding and including that though JonR2006.
(11.)2012 GT500 silver with red stripe, SVT performance package, and Recaro seats.
2018 Honda Civic Type R
Past Mustangs in order and color of text.
(1.)2000, (2.)2004, (3.)2006GT/Auto traded for (4.)2006GT/Manual, (5.)1996, (6.)2011GT, (7.)2003GT, (8.)2006GT, (9)2013 Boss 302, and (10.) 2002GT
(I have owned a few non Mustang cars over the years as well, but always try to have a Mustang with it or come quickly back to a Mustang!)