my two cents for anyone looking at the "big gain" before 4k RPMs isn't completely relevant. When you're at the track, you're shifting above that point. The AFR just looks like it needs to be adjusted also as they were quite different between the runs.
I'm not taking away credit to the intake, I'm just curious if the tune is registering it differently.
edit: ^^ His question is my main point
Though in the video it says 9whp gain... I assume that's peak.