Anyone actually used one of these things....it appears that you get your choice, 30% more power or 30% better gas mileage. Did GM, Ford, Chrysler, Toyota and Honda miss this trick? I'm sure glad we have these guys around here to invent this stuff. And it's under a hundred bucks...what a bargin. What would happen if you put two of these in your intake tract? Maybe instead of a 60% improvement, you'd only get 50%. I'll bet they would give you a quantity discount. Then, what if you use three....??