I have a 2012 Rallye Redline. I put the Mopar cold air intake on it. I doubt there is a measurable difference in performance but she really moans when you get on it...lol..

The mufflers on mine look like old school glasspacks. I don't know if they are baffled or not but they would have to be straight through. And the pipe is fairly large. I'd guess the restriction in the exhaust would be the resonators but removing them will cause a drone inside the car. I may replace mine with some shorty Cherry Bombs sometime just to see what it sounds like.

Tidlewave and another company are now making superchargers for the 3.6.
Dallas