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Old 07-09-2013, 10:26 PM   #4 (permalink)
redneck
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Join Date: Jun 2009
Location: SC Lowcountry
Posts: 1,796

Geo XL1 - '94 Geo Metro
Team Metro
Boat tails and more mods
90 day: 72.22 mpg (US)

Big, Bad & Flat - '01 Dodge Ram 3500 SLT
Team Cummins
90 day: 21.13 mpg (US)
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I don't know where your stock air box draws it air from but what you want is
a WAI (warm air intake). If your stock air box does not get it's air from under the hood in the engine compartment, then you should look for a way to make it happen.

Gas engines + warm air = Better mpg

Diesel engines + cold air = Better mpg

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