depending on where you go, itll clean your engine better, keep fuel rails unclogged, cleaner combustion chamber's cleaner intake valves, plus maybe 1mpg better at best

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Dave K
2011 Ford Ranger 4x4 Sport 4.0L "Dixie"
Rancho Suspension/Auto/3.73's/Pinstriped/Flowmaster SS Exhaust.

FUTURE: 3' Body Lift/32's/Windshield Visor/Brush Guard.