Does the Tornado Fuel Saver really work?

i was up late the other night when i came across this infomercial talking about this invention called the Tornado Fuel Saver. It supposedly adds horsepower and gas mileage to the car by placing this metal piece inside the intake.

Does this really work?
or is it just another gimmick

http://www.seenontv.com/prod-pages/t...fuelsaver.html