2011-2014 Mustang GT 5.0 Roush Cold Air Intake & Axle Back Muffler Exhaust Combo Kit Fits 2011-2014 Mustang GT & Includes air intake with filter and axle-back exhaust Air intake features re-oilable red filter; Gives 8 horsepower, 8-ft-lb of torque & improved mileage Exhaust uses all factory hanger locations; Includes clamps, pipes, mufflers & oval tips Intake & exhaust have no negative impact on emissions Made by Roush and covered under warranty