2016 Limited update
Just for those who are interested:
I have installed Magnaflow catback
exhaust (part# 19274), K&N intake (part# 77-2575KS), and a Livernois 91 octane high performance tune. This has changed my whole outlook on the performance of the 3.5 NA AWD grocery go getting tank! If you're looking for subtle gains in performance, as well as fuel economy, this is one way to go. She sounds like a beast at WOT in tunnels and under bridges! Now just to figure out if I will lower with springs or bags. Hope these part numbers and information are beneficial to someone. Thanks!