BDD Exhaust Manifolds

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. 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. BDs 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. Replaces Ford OEM part numbers: BL3Z-9430-B, BL3Z-9430-D, BL3Z-9431-B, BL3Z-9431-D Replaces Ford OEM Part Numbers/Bl3Z-9430-B/ Bl3Z-9430-D/Bl3Z-9431-B/Bl3Z-9431-D BD Thick Wall High-Silicon Ductile Cast Iron Resists Thermal Warping BD Diesel Exhaust Manifold Set - Ford F-150 3.5L Ecoboost 11-16 Suggest optional 1043002 addition parts kit for easier install BD Exhaust Manifolds Ford F-150 3.5L Ecoboost 2011-20