3.8 mph gain from no hood? Pics inside and input needed

I’m curious if this would make a difference
K&N Flow Control Air Cleaners 61-6000
Unfortunately, when your experimenting with parts made for a dominator, expenses add up quickly. I think some of it’s a combination of letting air pressure off the front and more high pressure air hitting the scoop opening. But no doubt getting the air filter out of the way of the incoming air is helping, too.