T4 Exhaust Manifold for 6.7 Cummins 2007.5–2018 | 2G Swap | Center Mount | NOT OEM
Important: This is NOT an OEM manifold. This T4 manifold is designed for aftermarket T4-flange turbochargers only. It will NOT fit the factory HE351VE or HE300VG turbo, which uses a T4i flange. If you need a stock replacement manifold for your factory turbo, see the T4i Stock Replacement Manifold for 6.7 Cummins.
The Diesel Power Source® T4 exhaust manifold for 2007.5–2018 Dodge Ram 6.7 Cummins is a high-flow, 2-piece performance manifold designed specifically for 2nd gen (2G) swap applications. This manifold mounts aftermarket T4-flange turbochargers — such as S300 (T4 config) and S400 turbos — in the factory turbo location, bolting directly to the 6.7 Cummins exhaust. It includes EGR ports for emissions compatibility or external wastegate use, and lowers rear cylinder EGTs by up to 200°F.
This manifold is for 6.7 Cummins owners who are upgrading from the factory VGT turbo to a larger aftermarket T4-flange turbocharger for increased performance, towing capability, or compound turbo builds. If you are keeping your factory turbo, you do not need this manifold.
What Makes This Different from the T4 Center Mount (1998.5–2018)
The DPS T4 center mount manifold (MAN0129) is designed for 5.9L 24V and 6.7L applications with a universal 2nd gen center-dump design. This 6.7-specific T4 manifold (MAN0126) is purpose-built for the 6.7 Cummins engine with features the center mount does not have:
- EGR Ports — Includes exhaust gas recirculation ports for emissions compatibility or external wastegate setups
- Sensor Ports — Drilled and tapped for 6.7-specific pyrometer and pressure sensor locations
- Factory Location Mounting — Turbo mounts in the factory turbo location to bolt directly to the 6.7 Cummins exhaust system
- 6.7 Head Bolt Pattern — Matched to the 6.7L ISB head
If you have a 1998.5–2007 5.9L Cummins, use the T4 Center Mount Manifold instead.
Who Needs This T4 Manifold
This manifold is required when upgrading the 6.7 Cummins from the factory VGT turbo to an aftermarket turbo with a T4 inlet flange. Common applications include:
- 2nd Gen (2G) Swap — Replacing the factory VGT with a 2nd gen-style turbo and manifold layout using S300 or S400 T4-flange turbochargers
- S400 Single Turbo Builds — S467, S472, S475, S480, and similar large-frame turbos
- Compound Turbo Setups — As the manifold for T4-flange high-pressure turbos in twin turbo configurations
- High-Horsepower Builds — Applications where the factory T4i manifold and VGT turbo cannot support the airflow demand
If you are keeping your factory turbo, doing a 3rd gen swap (which includes its own manifold), or using a T3-flange turbo, this is not the right manifold for your build.
Why the DPS T4 Over Steed Speed or Other Competitors
The DPS 6.7 T4 manifold is cast from high-nickel ductile iron with a 2-piece expansion joint design. This matters for two critical reasons:
- Stainless steel manifolds (including Steed Speed) expand and contract up to 2x more than ductile iron. That extra movement transfers stress into the cylinder head, head bolts, and gaskets, leading to leaks and failures.
- DPS CFD-tested runner geometry maintains exhaust gas velocity through properly sized runners. Competitor manifolds with oversized runners actually slow exhaust velocity, causing a bottleneck at the turbo flange. DPS has tested competitors that lost 40 HP on a 400 HP truck due to oversized runner designs.
The DPS manifold flows more air than the Steed Speed 6.7 Cummins manifold while using optimized runner sizing that works with the turbo rather than against it.
Key Benefits
- Lower Drive Pressure and EGTs — Reduced restriction lowers exhaust backpressure and drops rear cylinder EGTs by up to 200°F
- Turbocharger Flexibility — T4 flange accepts S300 (T4 config), S400, and other large-frame aftermarket turbos
- Faster Turbo Spool — CFD-tested runner geometry delivers exhaust energy efficiently for improved throttle response
- EGR Ports Included — Compatible with emissions equipment or external wastegate setups
- Factory Turbo Location — Bolts to the 6.7 Cummins exhaust system, keeping the turbo in the factory position
- Crack-Resistant 2-Piece Design — Expansion joint handles thermal cycling without the cracking that destroys factory and single-piece manifolds
- Center Mount Position — Turbo mounts in the center (2nd gen) position for optimal exhaust routing
Specifications
| Specification | Value |
|---|---|
| Design | 2-piece with expansion joint |
| Material | High-nickel ductile iron |
| Turbo Flange | T4 (center mount) |
| EGR Ports | Yes — for emissions or external wastegate |
| Rear Cylinder EGT Reduction | Up to 200°F |
| Coating | Black high-temperature ceramic (1,400°F rated) |
| Pyrometer / Sensor Ports | Drilled and tapped (two sizes) |
| CARB Status | Not CARB certified |
| OEM Replacement | No — this is NOT an OEM replacement |
| Included Hardware | 6 new gaskets and two bolts |
| Fitment | 2007.5–2018 6.7L Cummins with aftermarket T4 turbo |
This T4 vs the T4i Stock Replacement — Which Do You Need?
| Feature | T4i Manifold (Stock Replacement) | T4 Manifold for 2G Swap (This Product) |
|---|---|---|
| Turbo Flange | T4i (fits factory HE351VE / HE300VG) | T4 (fits aftermarket S300 T4, S400, large-frame turbos) |
| Factory Turbo Compatible | Yes | No — aftermarket T4 turbos only |
| EGR Ports | Yes | Yes |
| Best For | Stock replacement, towing, daily driving with factory turbo | 2G swaps, S400 builds, compounds, high HP |
| CARB Status | Contact DPS | Not CARB certified |
| Turbo Position | Factory location | Center mount (2nd gen position) in factory location |
What's Included
- DPS 2-piece T4 exhaust manifold for 6.7 Cummins (with EGR ports)
- Black high-temperature ceramic coating
- 6 new gaskets and two bolts
Optional upgrades (available at checkout):
- Serrated Spin-Lock Bolt Kit — upgraded bolts with teeth to prevent loosening
- Multi-Layer Gasket Kit — improved sealing over standard gaskets
Note: When selecting the Spin Lock Bolt or Multi-Layer Gasket Kit upgrade, the standard bolts and gaskets are not included. The upgraded components replace them.
Black High-Temperature Coating
DPS exhaust manifolds are finished with a high-temperature black ceramic coating designed to handle extreme heat and real-world diesel performance conditions. This coating is rated for sustained temperatures up to 1,400°F, helping reduce surface heat, improve durability, and maintain a clean appearance under normal operating conditions.
Please note: The black ceramic coating is rated for temperatures up to 1,400°F. If exhaust gas temperatures exceed approximately 1,470°F, the coating may discolor and shift to a gray appearance. This is a normal result of excessive heat exposure and does not affect the performance or structural integrity of the manifold. Warranty does not cover coating discoloration or finish changes due to high EGT conditions.
Fitment
This T4 manifold fits 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, and 2018 Dodge Ram 2500 and 3500 trucks with the 6.7L Cummins engine when upgrading to an aftermarket turbocharger with a T4 inlet flange.
This manifold will NOT fit the factory turbo. The factory HE351VE (2007.5–2012) and HE300VG (2013–2018) turbochargers use a T4i flange, not a T4. This manifold is for aftermarket T4-flange turbos only. For a stock replacement, see the T4i Manifold for 6.7 Cummins.
Need a different manifold?
- T4i Manifold for 6.7 Cummins (Stock Replacement, Fits Factory Turbo)
- T4 Center Mount Manifold 1998.5–2018 (For 5.9 and 6.7, No EGR Ports)
Related 6.7 Cummins Products
Frequently Asked Questions
No. This is NOT an OEM manifold. The T4 flange will not fit the factory HE351VE (2007.5–2012) or HE300VG (2013–2018) turbocharger, which uses a T4i flange. This manifold is designed exclusively for aftermarket T4-flange turbochargers such as S300 (T4 config), S400, and other large-frame turbos. If you need a stock replacement manifold, see the T4i Manifold for 6.7 Cummins.
The T4 center mount manifold (MAN0129B) fits 1998.5–2018 and is a universal 2nd gen center-dump design for both 5.9 and 6.7 applications. This 6.7-specific T4 manifold (MAN0126B) is purpose-built for the 6.7 engine with EGR ports for emissions compatibility or external wastegate use, 6.7-specific sensor port locations, and a bolt pattern matched to the 6.7L head. If you have a 6.7 Cummins, this is the correct T4 manifold for your engine.
Steed Speed manifolds are stainless steel, which expands and contracts up to 2x more than ductile iron during heat cycles. That expansion transfers stress into the cylinder head, head bolts, and gaskets. The DPS T4 uses high-nickel ductile iron with a 2-piece expansion joint that absorbs thermal movement. DPS also uses CFD-tested runner geometry — competitor manifolds with oversized runners have been shown to decrease horsepower by 40 HP on a 400 HP truck. The DPS manifold flows more air while maintaining the exhaust velocity needed for efficient turbo spool.
No. This T4 performance manifold is not CARB certified. If you need a CARB-exempt manifold for your 6.7 Cummins, see the T4i stock replacement manifold.
Yes. This manifold includes EGR ports, which can be used for emissions compatibility on trucks retaining the EGR system, or as external wastegate mounting points on trucks where the EGR has been removed.
4 Reviews
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Factory Location
what I needed for my 6.7 2nd gen swap. Running an S467 and wanted to keep everything in the factory location without fighting fitment. Downpipe lined up clean and oil drain worked without any weird angles.
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Drive Pressure
Switched from a stock manifold to this with a T4 S400 and the truck breathes way better. Drive pressure dropped and EGTs are noticeably lower on long pulls. You can tell it flows more
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EGT's
One of the biggest things I noticed was more even temps across cylinders. Rear cylinders used to run hotter, now it’s much more balanced. Makes me feel a lot better when towing heavy.
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NOT STOCK
Didn't read the fine print. This is not a replacement. Had to return manifold. They were cool about it
