2011-2014 Mustang GT GT-500 Roush 5.0 Axle Back Dual Exhaust Black Tips Fits 2011-2014 Mustang GT and 2011-2012 GT-500 Distinct aggressive sound; Same as Roush # 421127 but with black tips Black tips are powdercoated; Manufacturers warranty still applies to this system! Exhaust tips are made from 304 stainless steel and finished with a unique chrome flashing process Roush exclusive open-chambered design that will not deteriorate over time unlike conventional fiberglass roving material