Exhaust Headers for Dodge Durango (2011-2022) 5.7L V8

Upgraded Exhaust Manifolds for 2011-2022 Dodge Durango

This upgraded exhaust manifold set directly replaces the failure-prone OEM cast units on your 5.7L HEMI to eliminate exhaust leaks and sheared mounting hardware.

The Stock Durango Thermal Cycling Problem

The 5.7L HEMI engines are notorious for exhaust manifold bolt failures. The factory cast-iron manifolds undergo severe thermal cycling under heavy loads, causing substantial thermal expansion and contraction. Over time, this repetitive mechanical stress overcomes the yield strength of the factory mounting bolts, particularly on the rear cylinders, leading to sheared fasteners. Once a bolt shears, the exhaust manifold warps away from the engine block, creating an immediate exhaust leak. This leak introduces unmetered oxygen to the upstream O2 sensors, which negatively skews fuel trims, reduces engine efficiency, causes a persistent ticking noise during cold starts, and risks damaging the cylinder head mounting threads.

The Engineering Solution

To permanently cure the HEMI manifold warping issue, these Doctor Diesel USA manifolds are manufactured with a significantly thicker sidewall utilizing high-strength 304 Stainless Steel. Unlike standard factory cast iron, 304 SS maintains superior structural integrity at peak exhaust gas temperatures (EGTs), effectively resisting the torsional stresses that lead to flange warping. Furthermore, the installation hardware incorporates extended fasteners paired with engineered spacers. This critical mechanical design change allows the fasteners to stretch and absorb thermal expansion dynamically without snapping under pressure. Additionally, the heat shield mounting locations have been completely isolated from the primary cylinder head bolts, preventing secondary stress points and ensuring long-term hardware reliability.

Technical Specifications

Compatibility

• 2011-2022 Dodge Durango (5.7L HEMI)

The Dodge Durability Standard

Built for heavy towing and consistent payload duties, these upgraded manifolds restore the consistent power delivery expected from your 5.7L HEMI. Ensure your Durango maintains optimal thermal management and leak-free exhaust flow whether commuting or hauling cross-country.

Common Questions

Will these exhaust manifolds fit my 2011-2022 Dodge Durango 5.7L HEMI?
Yes. This upgraded exhaust manifold set is a direct replacement for 2011-2022 Dodge Durango WD chassis models equipped with the 5.7L HEMI Eagle V8.

Will this set fit a Dodge Durango with a V6 or SRT V8 engine?
This manifold set is engineered specifically for the 5.7L HEMI V8 engine and its corresponding factory exhaust port and downpipe geometry.

How do these manifolds prevent the common HEMI bolt shearing problem?
They are built from thick-walled 304 stainless steel to resist flange warping at high exhaust temperatures, and they use extended mounting fasteners with spacers and isolated heat shield mounts so the bolts can handle thermal expansion without snapping.

Which factory OE part numbers does this kit replace?
This set replaces left-side OE numbers 68045559AB, 53034137AC, and 68045559AA, as well as right-side OE numbers 5045486AA, 68045560AB, 53034138AC, and 68045560AA.

What hardware is included with the manifolds?
The kit includes both left and right 304 stainless steel exhaust manifolds along with the upgraded extended fasteners and engineered spacers required for installation.