BD Diesel Exhaust Manifold Set - Ford F-150 3.5L Ecoboost 11-16

The 2011-2016 Ford 3.5L has an inherent design flaw where not all of the OE stud locations are utilized by the OE manufacturer which leads to warped exhaust manifolds, broken exhaust studs and blown manifold gaskets. The cylinder head on Fords 3.5L Gas Ecoboost has threaded holes for 11 exhaust studs to be used, however the OE manifold only utilizes 8 of those stud locations. BD has designed a manifold that not only utilizes all 11 stud locations, but also improves exhaust flow and has improved durability, the way it should have come from the factory. BD's Ford 3.5L exhaust manifolds are made from thicker-walled high silicone ductile iron designed to resist thermal warping. Each kit includes 22 exhaust spacers and 22 class 8.8 studs designed to further improve thermal durability.This Part Fits: Year Make Model Submodel 2015-2017 Ford Expedition EL King Ranch 2015-2017 Ford Expedition EL Limited 2015-2017 Ford Expedition EL Platinum 2016-2017 Ford Expedition EL SSV 2015-2017