T4 Mount Stainless 2nd Gen Swap Exhaust Manifold for Dodge Ram 2500 3500 (1998-2019) 5.9L 6.7L Diesel

High-Flow T4 Mount Stainless 2nd Gen Swap Exhaust Manifold for 1998-2019 Dodge Ram 2500, Ram 3500 (BR, DR, DJ)

What it Does: The T4 Mount Stainless 2nd Gen Swap Exhaust Manifold replaces restrictive factory cast-iron log manifolds on 1998-2019 Dodge Ram 2500 and Ram 3500 trucks to optimize exhaust pulse scavenging and support high-volume T4 turbocharger conversions.

The Stock Dodge Ram 2500, Ram 3500 Exhaust Manifold Failure Points

Factory exhaust manifolds on Cummins 5.9L and 6.7L ISB platforms suffer from asymmetric runner geometry, thin gray-iron casting, and restrictive factory turbo flange patterns. Under sustained heavy towing or elevated boost cycles, uneven thermal expansion between the center and outer cylinders leads to severe exhaust pulse interference, high drive pressures, and warped flange faces that blow exhaust gaskets. Additionally, OEM 3rd and 4th generation rear-drop manifold designs create tight-radius bends that choke exhaust gas velocity, elevating exhaust gas temperatures (EGTs) and restricting turbocharger sizing options.

The Engineering Solution

Engineered for maximum thermal resilience and volumetric efficiency, this manifold utilizes a thick-wall cast stainless steel architecture with a 3/4-inch thick center section capable of resisting thermal fatigue cracking over 1,600°F. The balanced, equalized runner design features 1.650-inch interior runner diameters to streamline mass gas flow directly into a precision CNC-machined, divided T4 flange. Designed explicitly for 2nd-gen swap geometries, this casting repositions the turbocharger center-mount for optimal downpipe alignment and twin-scroll pulse separation. Integrated dual 1/8-inch NPT ports allow accurate pyrometer EGT monitoring at the collector.

Technical Specifications

Compatibility

• 1998.5-2002 Dodge Ram 2500 & 3500 5.9L 24V Cummins (Direct T4 Replacement)
• 2003-2007 Dodge Ram 2500 & 3500 5.9L Cummins (Requires 2nd Gen Swap Piping & T4 Turbo)
• 2007.5-2019 Dodge Ram 2500 & 3500 6.7L Cummins (Requires 2nd Gen Swap Piping & T4 Turbo)

Frequently Asked Questions

Does this fit the BR, DR, and DJ Ram 2500, Ram 3500?

Yes, this is a direct fit for the 1998-2002 BR/BE chassis and installs onto 2003-2019 DR/DH/DJ models when executing a complete 2nd Gen turbo conversion.

Can I reuse my factory HE351CW or factory VGT turbocharger with this manifold?

No, this manifold features a divided T4 foot and requires an aftermarket T4-flanged turbocharger along with matching intercooler piping, intake, and downpipe.

The Heavy-Duty Cummins Standard

Built to handle rigorous towing duty cycles, heavy commercial hauling, and high-boost sled-pull applications, this cast stainless steel manifold eliminates the thermal warping and backpressure bottlenecks common to factory Cummins ISB platforms.