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Common dudes. It isn't going to increase your gas mileage, that's just marketing bull crap. This isn't a "tune" either. It cracks me up they market it like that. This is small computer that intercepts the signals coming from the manifold pressure sensor and then lies to the dme, ie. engine computer, which then increases boost. Basically around 3psi and is adjustable for more. The cars computer adjusts a/f on the fly through the wide band 02 sensors. It's not magic.
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