SERIOUS QUESTION.... Has ANYONE EVER ACCTUALLY put one of those fans on and then put the car on a dyno. I would be interested to see how much you either gain or lose(considering you car may be able to suck more air than that fan can blow) because even if you only got 5 or 6 hp thats still 5 hp you didnt have before. If it did ACCTUALLY give you power the only thing to do next would be make one completely out of metal so that it wouldnt sling apart.

BUT with out actually seeing the thing on the dyno with my own eyes before and after the run i wouldnt believe it.