And I've said it before a bunch of times
But.
Back when they had cheap Torque Performance montly dyno days.
I dynoed about 5 or 6 different intake setups, with no other changes.
(As I have always been skeptical about the confirmation bias that comes with people spending time/money changing something...)
I tried a few different configurations with an Apexi pod filter, a few different configurations with the standard airbox.
Most power I made, was with a repco panel filter in the standard airbox.