High-flow, crack-resistant manifolds engineered for heat control, faster spool, and long service life on Ram 2500/3500 6.7L Cummins.
Diesel Power Source 6.7 Cummins exhaust manifolds increase airflow, improve turbo response, and tolerate sustained heat better than thin factory castings. Whether you tow in the mountains, commute daily, or want dependable power for performance builds, these manifolds are built for durability and repeatable sealing. Choose a stock-replacement manifold for the factory turbo or a T4 performance manifold when upgrading to a larger turbocharger.
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Designed for Ram 2500/3500 with the 6.7L Cummins, model years 2007.5–2024. Review each product page for year-specific notes (EGR/VGT configurations), stud kit recommendations, and turbo flange style.
Application-specific manifold, hardware where noted, and pre-tapped sensor/pyro ports (see product listings for exact contents). All sealing faces are precision-machined for repeatable gasket crush.
Owners report steadier speed on grades, fewer downshifts with a trailer, and cooler temps on long pulls. If you tow in high heat, at elevation, or on larger tires, a high-flow manifold helps the turbo stay in its efficiency range.
Planning a turbo change next? See 3rd Gen Swap Kits and Add-A-Turbo Kits.
Yes. Lower backpressure and steadier turbo operation help manage heat and drivability with factory systems in place when installed as directed.
Stock-replacement keeps the OEM turbo flange and is a direct fit. A T4 manifold is for trucks moving to a T4-flanged turbo to add airflow and future power headroom.
Usually no for a manifold alone. If you change the turbo or fueling, a calibration update may improve response, vane control, and shift strategy.
New gaskets are recommended. Replace stretched or corroded hardware and follow the factory torque spec and sequence on a cold engine.
Results vary with load, altitude, and turbo setup. Many trucks see noticeably cooler temps on long pulls due to reduced backpressure and better flow distribution.
