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Stainless Works long-tube headers for 2011–2014 Mustang GT use 1-7/8" primary tubes, 3" X-pipe and 3" catted lead pipes that mate to the factory connection. Tig-welded 304 stainless construction with 3/8" thick flanges and slip-fit collectors with merge spikes replaces factory manifolds, catalytic converters and H-pipe with an install-ready, lifetime-guaranteed bolt-on system.
Stainless Power 2011-14 Mustang GT Headers 1-7/8in Primaries High-Flow Cats 3in X-Pipe
