BD Diesel 1043003 Exhaust Manifold Driver Side for 11-16 Ford F150 3.5L Ecoboost

BD Exhaust Manifold Driver Side Ford F-150 3.5L Ecoboost 2011-2016 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 11 exhaust spacers and class 8.8 studs designed to further improve thermal durability. Driver Side Replaces Ford OEM part numbers: BL3Z-9430-B, BL3Z-9430-D Ford Expedition 2015-2017 Ford F-150 2011-2016 Ford F-150/Lobo 2015-2016