Headers Kit for Ford Transit (2015-2024) & F150 (2011-2016) 3.5L Ecoboost

Upgraded 304 Stainless Steel Headers Kit for 2011-2024 Ford F-150, Transit & More

Direct Replacement Exhaust Manifolds: Replaces the failure-prone factory cast exhaust manifolds with a heavy-duty 304 stainless steel design that utilizes all available cylinder head stud locations to permanently eliminate thermal warping and exhaust leaks.

The Stock 3.5L EcoBoost Design Flaw

The factory exhaust manifolds on the 2011-2016 Ford F-150 and 2015-2024 Ford Transit 3.5L EcoBoost engines suffer from a critical engineering oversight. While the Ford cylinder head is machined with 11 threaded holes for exhaust studs, the OEM manifold only utilizes 8 of these locations. Under extreme thermal cycling—especially during towing, hauling, or heavy payload operations—this uneven clamping force causes the thin-walled factory cast manifolds to warp. The resultant stress shears the factory exhaust studs and blows out the manifold gaskets, leading to severe exhaust leaks, loss of turbo spool efficiency, and irritating exhaust ticking noises. This heat soak and warping issue is a known failure point on hard-working, higher-mileage EcoBoost platforms.

The Engineering Solution

Doctor Diesel USA engineered these upgraded exhaust manifolds to correct the factory shortcomings permanently. Constructed from thicker-walled 304 stainless steel, these headers offer vastly superior resistance to thermal warping and material fatigue compared to the OEM cast units. Most importantly, this kit utilizes all 11 available stud locations on the cylinder head, distributing clamping loads evenly across the entire mating surface. The kit includes 22 heavy-duty class 8.8 studs that are 15mm longer than stock, paired with 22 expansion spacers and nuts. This specialized hardware safely accommodates thermal expansion, preventing the studs from stretching or snapping during high-EGT scenarios. The optimized internal design also improves exhaust gas scavenging, restoring lost turbo response and ensuring long-term reliability.

Technical Specifications

Compatibility

• 2011-2016 Ford F-150 w/ 3.5L Eco-Boost
• 2015-2024 Ford Transit w/ 3.5L Eco-Boost
• 2011-2014 Ford Expedition w/ 3.5L Eco-Boost
• 2011-2014 Lincoln Mark LT w/ 3.5L Eco-Boost
• 2015-2017 Lincoln Navigator w/ 3.5L Eco-Boost

The Ford Heavy-Duty Standard

Engineered for work trucks, fleet vans, and heavy-towing SUVs, this manifold kit guarantees maximum durability. By properly distributing exhaust load and resisting severe thermal cycles, it ensures consistent turbo performance and leak-free reliability no matter the payload.