I use this intake at the track, with open stacks. On the street I use oval air filters.
At speed, the air rushes into the air scoop, across the top of the stacks, and then to the back of the engine bay. The venturi effect creates a vacuum across the top of the first few stacks. Then the air piles up in the back, and force feeds the rear cylinders.
So I made this out of some scraps I had lying around. I bonded the L shaped brackets to the bottom of the hood.
It works. At the top end the engine is much smoother, and reaches a 6,400 redline with ease. Without it, it's almost impossible.