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i have a 6'' lift with 37's, 4.10 gears with a throttle body spacer and k and n air filter and im getting steady 13mpg highway
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02 F-250 5.4l,Ext. cab, LB. 6.5 Procomp lift,37'' BFG's, K&n, flowmaster,Kenwood touch screen and lot's of other electrical goodies..
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