2015 - 2016 EcoBoost Mustang Interceptor Axle-back Fits: 2015, 2016 & 2017 Ford Mustang EcoBoost Transforms the exhaust note to a unique deep performance sound All stainless steel exhaust system is built from North American T304 grade material for superior durability CNC mandrel bent for consistently smooth flow path and precise fit Straight through resonator design maintains flow area 4" double wall, polished T304 stainless steel tips with beveled edges add style to your ride Reduced back pressure boosts fuel economy Best sounding exhaust on the market! Simple Do-It-Yourself installation Hand-crafted in the USA Direct bolt on Installation Off-Road use only LIMITED LIFETIME WARRANTY