The F150 comes with mandrel bent exhaust from the factory. By only replacing the restrictive OEM muffler you can achieve the same sound and performance as a full cat-back exhaust system. For A Fraction Of The Price. Our retrofit muffler bypass has been engineered for an aggressive sound and is designed for a direct fit and a quick and easy installation. Installation requires one cut to your factory exhaust system and is bolted on using the supplied hardware. These replace the factory muffler on all F150's with the factory single exhaust that exits behind the passenger tire, it will fit 5.0L V8 as well as the 3.5 & 2.7L EcoBoost engines. These will not fit PowerBoost engines or trucks equipped with factory dual exhaust. This is an aggressive sounding exhaust system, by installing this and leaving the factory resonator in place you will have an exhaust system that sounds fantastic, is about 45% louder than stock, with minimal drone.