You won't notice much difference with an intake, I'd recommend just getting an aftermarket drop in filter. They make oil free ones now, I know airaid has one that's what I use.
Get a superchips flashpaq tuner. It does wonders for the 08+ 4.7L. Huge performance gains very inexpensively and easily. Up to 60hp max(not peak) gain on 93 octane.
You can do any combo of intake/exhaust/tuner.
Breathing in and out is good enough for me.