my 2014 , i have stillen g3 , motordyne exhaust, stock cats, no tune, I'm getting 14mpg, local driving, daily driver ....... if i get art pipes and a tune, will my mpg be better ?
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2014 White Tour/Sports Package 6MT , RJM Adjustable Clutch Pedal, GT-R Start, Stillen CAI, Z1 25 Row Oil Cooler, Motordyne E370, Swifts, 20mm/25mm, SPL Rear Camber TOTALED 10/24/14 2013 Black Tour/Sports Package
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