BD DIESEL 1043003 EXHAUST MANIFOLD DRIVER SIDE – FORD 3.5L ECOBOOST (F-150 2011–2016 / TRANSIT 2015–2023 / EXPEDITION & NAVIGATOR 2015–2017 / LOBO 2015–2016)

Product Description

The BD DIESEL 1043003 Driver Side Exhaust Manifold is the permanent fix for a known 3.5L EcoBoost factory weakness that leads to warped manifolds, broken exhaust studs, and blown manifold gaskets. BD Diesel redesigned the manifold to take full advantage of the cylinder head’s available mounting points, using all 11 stud locations instead of the factory manifold’s reduced pattern. The result is a stronger seal, better durability under heat cycling, and long-term reliability for daily driving, towing, and fleet use.

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Constructed from thicker-wall high-silicone ductile iron and finished with a high-temp coating, this manifold is engineered to resist thermal warping and improve long-term sealing. It’s the best choice when repairing ticking noises, exhaust leaks, repeated gasket failures, or recurring stud breakage on 3.5L EcoBoost applications.

Fitment

• 2011–2016 Ford F-150 3.5L EcoBoost
• 2015–2023 Ford Transit 3.5L EcoBoost / 3.5L Gas (as equipped)
• 2015–2017 Ford Expedition 3.5L EcoBoost
• 2015–2017 Lincoln Navigator 3.5L EcoBoost
• 2015–2016 Ford Lobo 3.5L EcoBoost
• Driver Side / Left Side Exhaust Manifold

Key Features & Benefits

• Uses all 11 stud locations to prevent warping and gasket failures
• Thicker-wall high-silicone ductile iron construction for thermal durability
• High-temp coated finish for heat resistance and long service life
• Direct-fit replacement engineered to correct common OEM design limitations
• Ideal repair for exhaust leak ticking, broken studs, warped manifolds, and blown gaskets

Cross-Reference & Compatible BD Diesel Products (BD DIESEL ONLY)

For a complete repair and maximum sealing reliability, we recommend pairing this manifold with matching BD Diesel EcoBoost manifold components available on cppdiesel.com (BD Diesel only, verified working links).

• BD DIESEL 1043004 EXHAUST MANIFOLD PASSENGER SIDE – FORD 3.5L ECOBOOST (2011–2016)
• BD DIESEL 1043001 EXHAUST MANIFOLD SET – FORD 3.5L ECOBOOST (2011–2016)

Why does the stock manifold fail on 3.5L EcoBoost engines?

The factory manifold does not utilize all of the available cylinder head stud locations, which allows the manifold to flex and warp under heat cycling, leading to broken studs and blown gaskets.

Is this a direct bolt-on replacement?

Yes. This is a direct-fit driver side manifold designed to replace the factory unit while improving durability and sealing strength.

Does this help prevent broken exhaust studs?

Yes. By using all 11 mounting locations and a stronger casting, this manifold significantly reduces the likelihood of warping and repeated stud failure.

Specifications for BD DIESEL PRODUCTS 1043003