How much does a hood scoop actually help?

Ever wonder why your car runs better on a cool morning? Scoop or cold air duct works.

Agree, same goes for racing at night, cool dense air. The dart sport/ demon snorkel is supposed to be a pretty good scoop. I read somewhere that one and the challenger TA were the best factory offerings. All that said dosnt having a dog house on the hood allways look and feel fast? Lol! I miss the six pack scoop I had on my 69 cuda and after going back to the stock hood I'm saying wtf, why didn't Chrysler put chrome inserts on the 69, like the 67-68, or the cool 68,69 darts? Anyways, scoops are cool on muscle cars.