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Anyone ever used one or know of someone who has one on their late model Chevy truck?? They say that the VR Velocity Stack can increase gas mileage by aprox 3 MPG. Seen it on Trucks! and thought I would try to find more info about it. It is some sort of throttle body insert to allow air to move more efficiently into the intake.

http://www.vararam.com/products03.html
 

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I figure it will do what they say with respect to helping the t/b's air flow, but to the tune of that much power???

There are also little kinda bowtie shaped inserts that fit between the bores on a tpi t/b that do about the same thing..

But again, I don't know if it is that much of a power producer either??

pdq67
 
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