Roush Performance Products 421248 Exhaust Kit, 1 Pack Fits the 2011-2014 5.0L, 6.2L (including SVT Raptor), & 3.5L f-150s - all Cab and bed configurations Increased air flow and less back pressure to help reach the trucks full potential in horsepower and torque Muffler, outlet pipe, and y-pipe are all polished