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It increases power by decreasing vehicle weight by the ounces of a few bills, while decreasing seat padding and giving you a tiny bit more feeling of the power of your car. If you've watched the infomercial, the blond headed bimbo from Hawaii, is the intelligence level of the prospective customer they are looking for.
Are people STILL really asking about this kind of stuff?
Oh well, maybe it just seemed like every other poster to the 4 cylinder forum at RPS asked about either a TB spacer or Tornado.....hope that doesn't start to happen here.
Checkout last month's or this month's Popular Mechanics. None of the "fuel savers", especially the Tornado, work--some were found to be even dangerous! They did mileage and horsepower on the dyno, with and without the product.