Well, I installed my aFe Cold Air Intake about 2.5 weeks ago. Was able to do it myself. I am not a mechanic at all, so that is huge for me. Immediate improvements in sound, performance and about .5mpg improvement in gas mileage. Makes me very happy.
I love aFe CAIs. I had one on my 2003 Ram, and loved the improvements. On my 2011, the improvements in efficiency, performance and sound were even more pronounced. And less than $270 shipped.
Just had my MagnaFlow CatBack Performance Exhaust system installed last Friday. Improved efficiency, performance and sound even more.