BD Diesel 17-20 Ford Ecoboost 3.5L Exhaust Manifold Kit

BD Diesel has been making heavy-duty truck parts for decades, and this exhaust manifold kit for your Ford Expedition or Lincoln Navigator is one of their staples. If you're dealing with cracked or failing exhaust manifolds on your 3.5L EcoBoost, this kit is designed to be a long-term solution. These aren't just replacements; they're an upgrade that addresses common failure points and improves performance.

What sets these manifolds apart is how they tackle the issue of bolt failure. The factory manifolds can sometimes warp and break bolts due to thermal expansion. BD Diesel reinforces this by adding two extra mounting holes per manifold, along with extended studs and spacers that are 15mm longer. This design helps the manifold handle heat cycles better and reduces stress on the mounting points. Beyond durability, they're also built to flow better, with a 16% increase over stock, which can help your engine breathe a bit easier and perform more efficiently. The casting itself is thicker and made from high-silicon ductile iron, a material known for its resistance to warping, ensuring these manifolds will hold up over time.

This kit comes with everything you need to get the job done, including the gaskets and hardware. It's also CARB EO No. D-553-2750 compliant, meaning it's legal for sale and installation in California and other states that follow CARB regulations. If you're looking for a robust, reliable replacement that also offers a performance edge, this BD Diesel kit is a solid choice.