Do yourself a favor and do some more detailed research on this and other RAM forums. I see the subject come up here and on the Charger/Challenger/300 forums and my observation is that 9 out of 10 or more people say that they make no more horse power (in some cases less, when the stock intake was already better than anything you can bolt on), and the most significant thing they do is allow you to hear a louder intake sucking noise (something that some people like to hear).
I've not done one and I'm only relaying what I've read in the past 5+ years I've been following RAM/DODGE/Chrysler forums.
My understanding is that the best bang for your buck for horsepower is a custom tune. All the electronic magic.
And when it comes to horsepower. If you've got 395 in your '15 RAM Sport.....what are you going to do with 10, 15, 20 more? If it were me, I'd put a kick-ass sound system in, or some personalized appearance mod (Lighting, badging, debadging, stripe, wheels, etc....)