Ok this is just hypothesis from a 19 yr old (know it all right ?) but i think the whole tornado idea is just blowing smoke or something. Now from what I hear turbulence in the intake is counterproductive of power and mileage ? I would personally not purchase a tornado for any reason (power,mpg, etc) but i would instead focus on intake, ignition and exhaust. which I really did BTW. I installed a fenderwell intake designed for an 86-88 mustang with speed density off ebay for 50 dollars and picked up 2mpg (20-22). Then i installed a new disributor cap,rotor,wires and spark plugs as well 1mpg (22-23). After that my brother let me rob his wrecked mustang's exhaust system for 40 dollars. It consisted of bbk shorty headers,off-road x pipe and flowmaster cat-back. I installed all of it up to the mufflers where instead of getting fabbed exhaust or modifying the mustang design i got lazy and slapped on some elbows and straight "tailpipe" pipes that exit before the rear tires 2mpg (23-25). Which is as far as I will go. Now i understand you probably will not come across a used mustang exhaust system as cheap as i did or get a deal on an intake like myself either but just my .02 on the subject. Hope you get some more mpg's. My old man don't beleive the mileage i get with my "big 8" so he says .:steering