Anything over a 3.55 is a complete waste and way too much gear. I would actually skip the gear and go with a converter. I ran low 11's N/A with my 3.15's.
This is from personal experience with my 2011. Keep in mind many in this thread have no experience and they're just throwing out numbers...
I would start with a good tune and then longtubes if emissions isn't a hassle. Skip any shorty header, not worth the money or hassle.
The Boss Intake will work good on the manual but not on an auto with the stock converter. The 18+ manifold is cheap and proven.
Stock throttle body and CAI will...