for the 13's there are really 3 main options, Vararam Air Grabber very nice intake old school look decent power gains retail between $344-$369, S&B intake really no better than putting a hi flow replacement filter in the stock air box however they look nice but are still just as restrictive as the factory air box (the factory air box is a nice design and functions very well), and then you have short ram intakes there are many variations the favorite as of late seems to be the LMI, it is made with true carbon fiber so your heat soak is almost nothing compared to a lot of the others, and it is really the only intake (of the 3 above) that increases your air flow velocity which in turn gives you more power/tourque.
With all 3 you will find those who swear by it, my personal experience is this.
Had factory air box switched it out to an AirAid (not going to be doing that ever again)
Went from the AirAid back to the stock box with a hi flow replacement filter (worked better than the AirAid)
From the stock box w/ hi flow filter to the Vararam Air Grabber (worked very nice and looked killer also, not to loud honestly can barely hear it all for me this was a good thing)
If I still had the truck I would put the LMI on it, I had the pleasure of driving a friend of mines truck with the LMI on it (same truck as mine except I had a 8" lift and he has a 2012 hemi, 4x4 quad cab 4" lift on 35's 3.55 gears, DS tuner) and oh boy could you tell that LMI was on there! It was very nice and seemed to pull a good bit better than any of the other configurations that I had.
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