Stainless Works headers for 2011–2014 Mustang GT feature 1-7/8" primaries, a 3" X-pipe, 3" lead pipes and high-flow catalytic converters for use with Stainless Works exhaust. Tig-welded 304 stainless headers with 3/8" thick flanges and slip-fit collectors are built to connect to SW Performance Connect systems, providing a continuous 3" diameter path for a complete bolt-on solution.
Stainless Power 2011-14 Mustang GT Headers 1-7/8in Primaries High-Flow Cats 3in X-Pipe