OK, first of all, if you don't know what your talking about, don't say anything. My Father bought the Air Tornado. He sen't it back. Heres the reasons. Like the ad promised, he did feel a noticable increase in power (He installed it in a ford expedition v8). However, unlike the ad claimed, he actually LOST mpg. So thats why he sent it back. Now to the amature physicists, please desist in putting out false information m'kay? Yes, it WILL have an effect on airflow, regardless of its restrictvness. Organization of air molecules (adding a pattern to the stream to increase airflow) has been tryed before, and if my memory serves is often used in more specialized "one off" applications (race cars, and the like). however, its just not cost effective for auto manufacturers to put these in every car (gains in horsepower, or mpg are no where near what the manufacturers would have to pay to install them in thousands of vehicles). I hope this helps you DarkInfluence.