The Stainless Works long-tube headers for 2011–2014 Ford F-150 5.0L (2WD/4WD Screw/Scab trucks) are made from 304L stainless steel and feature 1-3/4" primaries with 3" slip-fit collectors. They include 3" catted leads and a Y-pipe that fits the factory connection point, offering a direct-fit header solution designed to mate with Stainless Works exhaust systems.
Stainless Works 2011-14 F-150 5.0L 1-3/4in Primaries 3in High-Flow Cats Y-Pipe