These vortex spiral systems have little effect, if none at all. They
claim an increase in HP, Perhaps in one test engine. Usually the 1 hour
commercials claim many things. Some claims may be correct, but they may not
be for your engine. Be an educated consumer. The only way you will get more
horsepower, is by changing the computer's settings, or by changing-out the
mechanical parts of your engine.
Most engines today are maxed-out, to get maximum HP. When you try to
tweak these things, you will void the warranty, or damage the engine, when
you push it to hard. Most engines that are tweaked to get max HP out of
them, are usually short lived, unless you make major changes to the engine.