Dynatech Exhaust - 05-10 Mustang GT Dynatech Long Tube Headers 1 3/4" SS Dynatech 1 3/4" longtube headers for 05-10 4.6L 3V Mustang GT. All stainless steel construction and made in the USA. Pair with 2.5" X-pipe or use 2.5" collector adapters or 2.5" PowerCats and connect to your stock H-pipe.