The Stainless Works long-tube headers for 2011–2014 Ford F-150 5.0L (2WD/4WD Screw/Scab trucks) are American-made from 304L stainless steel with 1-7/8" primaries and 3" slip-fit collectors. They include 3" catted lead pipes and a Y-pipe that fits to the factory connection point, allowing a straightforward link between high-flow headers and the stock exhaust path.
Stainless Works 2011-14 F-150 5.0L 1-7/8in Primaries 3in High-Flow Cats Y-Pipe