[Tom Goldman]

If you calculate the area of the scoop opening ,it actually not that small, but its shape helps maintain velocity
Plus it's used on cars that typically have fairly small displacement engines.
The biggest benefit from this style scoop is drag , or rather how much less they have than the older broader style scoops.
I switched to a triangle style inlet ,narrow scoop from the older ,wide style scoop and picked up nearly 2 mph.