Ford EcoBoost Performance Exhaust - Driver Side - BD Diesel - BD Diesel Exhaust Manifold Kit - 2017-2020. This driver-side BD Diesel exhaust manifold kit is engineered for Ford 3.5L EcoBoost trucks from model years 2017 through 2020 to address common OEM failures while improving flow and durability.

The BD Diesel manifold replaces OEM left-side part numbers JL3Z9461C / JL7Z9431 and features a thicker, high-silicon ductile iron casting with a uniform wall thickness to resist warping under heat. BD added two additional mounting holes per manifold and supplies extended studs, 15mm longer spacers, new longer bolts, and gaskets to reduce stress from thermal expansion and improve long-term reliability. Independently tested flow improvements show approximately 16% better flow capability compared to the OEM design. The kit includes all necessary gaskets and hardware and carries CARB EO No. D-553-27.

Features

• Driver side exhaust manifold kit for 3.5L EcoBoost (2017–2020)
• High-silicon ductile iron construction with uniform wall thickness
• Two additional mounting holes per manifold to reduce bolt failures
• Includes extended studs, 15mm longer spacers, new bolts and gaskets
• Approx. 16% increase in flow versus OEM; replaces JL3Z9461C / JL7Z9431
• CARB EO No. D-553-27; gaskets and hardware included

This kit is aimed at enthusiasts who want a durable, direct-fit upgrade for the driver side exhaust manifold that addresses known weak points in the factory design while improving exhaust flow. If you have questions or want help confirming fitment for your vehicle, call us directly. We have two locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. 512-982-9393 (TX) | 562-981-6800 (CA)

If you're considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov