There is alot of, i dont want to say misinformation but, yea, misinformation lol. I laugh when i see intake manufactures claiming retarded power gains like 15whp and 30-50tq. Would love to see back to back runs on the same dyno, same settings and same weather comparing stock vs intake added.
With just adding a intake on these trucks, you will be lucky to see 2whp without changing the tune. With a fly by wire system, the computer is going to see more air coming in and start to close the throttle body to help keep the fuel trims and afr in check. I saw this first hand on my bike. With my bike its been dyno proven to see 8whp increase with removing the restrictive air filter with a high flow and doing back to back testing. But fuel trims were way out of wack and the ecu was trying to revert to stock setup. On a 500lb bike, you feel the 8whp increase. On a truck, you wouldnt feel ****, especially with a intake setup that brings in hot air from the engine bay and no ram air effect, causing less hp increase, if any. Seems more like a placebo effect.
If all you care about is the sound and looks, go for it. But if you want performance increase, you need a custom tune to get that from a intake.
On the topic of sound. Not sure on the truck but my mitsubishi evox, drop in k&n filter definitely enhanced the sound of the intake and bov. When i switched to the AMS cai that relocates the filter to in front of the wheel well near the ground and away from the heat, it was loud as ****.
I do miss the sound of my 2016 sport with a k&n. Gotta get that growl back.