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I've not really heard or read much about the fuel economy issues with nerf bars or running boards. I mean the profile is less than the truck is roughly about 3" to 4" , how will that little affect your fuel economy ?
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2008 Crewmax X-SP
carbon Fiber Dash kit
20" JTI Rims
BFG AT KO 285/55/20
AFE C.A.I w/ Dry Pro filter and the AFE Mod
Blacked out Headlight Mod.
Flo~Pro muffler #744
Toytec 3" front , 1" rear blocks and Diff. lowering kit
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