Are there any recommendations on this? Change it? Which one? Does it require a tune?
I have used K and N on my modified truck and was happy with it, just don't know if it's the best for the GT 350
Check in the engine modification section. There are dyno numbers and flow tests that some members have conducted.
My general understanding is that most don't net much of a gain on their own, and the majority of the benefit comes from the required tune. Which will also void your warranty.
Buy the Ford Performance/Airraid reusable filter and call it good.