I iinstalled one of these on my truck the other day, and now im getting over 30 MPG in the city, its an awesome mod.


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I dont really see how that will work to improve fuel economy, but i posted up about a hydrogen fuel cell thing that cost a cool grand and is suppose to increase MPG by atleast 50% or your money back. This is def alot cheaper, but i just dont see the logic of how it is suppose to increase gas mileage.