I'm just going to point out that when aftermarket manufactors do their dyno comparsions they basicly cheat.
They never use a new factory air cleaner, it's always an old plugged cleaner. That sort of stuff.
Plus the most fair tests would involve a dyno in a wind tunnel.
The way that most factory installed air intake systems are vented basicly turns them into a ram air system, which can only be tested wiile driving or while in a wind tunnel.