When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
If you get a Tornado it will do exactly what the advertisers claim... by reducing your wallet weight by .015 lbs the HP to weight ratio of your truck will increase by .003% and thus over then next 250,000 miles you will have a net gain of .0005 horse power and .00097mpg greater fuel effeciency.
Snake oil my man, if they were worth half of what they claim Ford would install them in every vehicle.