F150 3.5L Ecoboost 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.Install Time:8 Hours36-Months 75,000 MilesNote: CARB EO No. D-553-18 CARB EO No. D-553-27 SEMA Certification No. SC-BDD01-0069 US Patent Number US-D1061621-SEmissions:This product is covered under CARB EO and is legal for sale and use in all 50 states. EMS:1Features:50 State Legal Average flow increase of 25.9 percent OEM avg 110cfm/port BD avg 139cfm/portUtilize 3 additional exhaust stud locationsBD Thick wall high-silicon ductile cast iron resists thermal warping 15mm longer exhaust studs + spacersNew studs, spacers, and nuts includedReplaces Ford OEM part numbers: BL3Z-9430-B, BL3Z-9430-D, BL3Z-9431-B, BL3Z-9431-D Ford Expedition 2015-2017 Ford F-150 2011-2016 Ford F-150/Lobo 2015-2016 Ford Transit 2015-2024 Lincoln Mark LT 2011-2014 Lincoln Navigator 2015-2017 Suggest optional 1043002 addition