Originally Posted by TboneZX3
i.e. airbox vacuum, warm air intake through the holes. I stated that ram air through the newmission tube would not be a concern, and you've shown that.
Airbox vacuum, airbox vacuum, airbox vacuum. Yes it's been shown that there's still suction through the NewMission tube. No dirt where all the holes are show there's no suction there. I'd bet if all those holes weren't there that one dirty area on the filter would be 5x dirtier due to more suction because of airbox vacuum.