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Old 10-08-2009, 05:41 PM
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Ultimateride14 Ultimateride14 is offline
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Join Date: Sep 2009
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Vehicle: 2007 Dodge Ram QC 4x4
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Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
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My thought would be is if you gain Hp (within a certain severity of modification) You should gain mileage. The more power your motor has the easier it is to move the truck. So unless you have a crazy rich tune. Any moderate gain in power should give you better mileage.
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