Chevy and GMC Duramax Diesel Forum - View Single Post - Air Intake Looking for Advice
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post #6 of (permalink) Old 05-02-2019, 08:27 PM
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Join Date: Oct 2010
Posts: 74
On the subject of any gains, there is a very small mileage improvement. But, you won't be able to tell unless you are really paying attention. It is maybe 1/2 mile per gallon. With a gain this small it is difficult to tell if the gain is from the air box or just more favorable environmental conditions. I measured several tanks of fuel both before and after. About 1/2 mpg is all I mustered.

The gains would be more significant if you also had banks Derringer or another tuning device installed i believe.
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