I agree, the best air box for off roading with our Bronco Raptor's is the original OEM system and filter that is specifically engineered and designed for our Bronco Raptor use cases.I was tempting to order the KN CAI system by see the #'s. but looking more closely on their system design. I opted out and just use the standard KN air filer to replace the oem paper filter instead. IMO there is a reason the OEM air box design are more complicated and channels, is to not let water easy to pass the filter and prevent hydro lock when go through deep water. And the KN CAI system is designed to let air go more direct to the filter. More air more power!
But for my use of this truck, I do go through deep water, and mud water occasionally out at the trails. in this case is not for me. hydro lock is not fun, and i see many happens on the trail.