I'd say based on the fact that is drawing outside air that it would be better than normal intakes that only take in from the engine bay.
I am a little surprised they dont block off the standard air intake opening in the side of the box, but that could be rectified pretty easily.
Have you installed it yet? Curious as to fit and finish. Wonder how the scoop would work for SUV's, if I am reading their fitment right, it probably doesnt work for suvs or would require more modifications.