Yes it will be fine. You'll still see a gain, just not as much as with a tune. My father in law has been running an intake and exhaust on his 6.2 high country for a while now without a tune and it performs just fine.
It is louder than stock, but with the AFE having an enclosure that might muffle some of the sound from it. Mine is open, as is my father in laws, so they're probably a little louder.