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Save your dinero ... I had a used one when I ran a big block gasser ... at a consistent 6-7 mpg one tends to try anything. It kept SOME of the bugs off the front of the fiver and made awesome water swirls up in the air when traveling in the rain ... sadly it made absolutely no difference in fuel mileage. Even if it did make the fuel mileage improvement claims of the manufacturers, your truck would be worn out before the wing paid for itself. Another issue ... depending on your truck height, you may find you can no longer pull into the garage without folding it down.
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