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Old 04-04-2011, 12:42 AM
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Travel'n Trees Travel'n Trees is offline
LawnSite Senior Member
Join Date: Jan 2006
Location: Lee's Summit Mo.
Posts: 631
Duramax lift kits and big tires kill mileage especially on gas motors. The 6.0 needs a tune underdrive pulley and cold air intake. Will greatly improve If you keep your foot out of it.
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