DPS 2-Piece 3rd Gen Cummins Exhaust Manifold for 2003–2007 5.9L Dodge Cummins T3
CARB Exempt – Legal for Street Use in California
The DPS 2-piece exhaust manifold is the best exhaust manifold for Dodge Cummins 5.9 Diesel 2003–2007 common rail engines. Made from high nickel moly-bendum ductile iron, this manifold is built to handle extreme heat while improving performance, airflow, and reliability.
Why Choose Our 3rd Gen 5.9 Cummins Exhaust Manifold?
Unlike OEM manifolds that shrink and crack under heat stress, the DPS 2-piece design features expansion joints that allow the manifold to flex naturally—eliminating warping, cracking, and gasket failures. CFD-tested for optimal flow and pressure balance, our manifold improves turbo spool-up, exhaust efficiency, and rear-cylinder temperatures by up to 200°F.
Top Features & Benefits:
- Flows 23% more than stock 5.9L Cummins manifold
- Reduces EGTs on rear cylinders by up to 200°F
- CFD-tested and balanced to maintain exhaust velocity
- Black high-temp coating for durability
- Drilled and tapped for pyrometer and pressure fittings
- Includes block gaskets and two bolts for installation
- Ships pre-assembled and pressure tested
- Replaces OEM part numbers 5135788AB and 5135788AC
- CARB exempt and legal in California
Better Than Stainless Steel Manifolds
Single-piece stainless manifolds expand up to twice as much as our ductile iron design, stressing gaskets, bolts, and even the engine head. Our manifold stays tight, aligned, and built to last.
Fitment Details:
- Fits Dodge Ram 5.9L Cummins trucks from 2003, 2004, 2005, 2006, and 2007
- Designed for T3 turbo flange setups
- Perfect upgrade or direct OEM replacement
Trusted Performance, CARB Legal
Diesel Power Source manifolds are CARB exempt and 100% legal for installation and street use in California. Ideal for emissions-compliant builds or performance upgrades in all 50 states.
**When upgrading to the Spin Lock Bolt or Multi-Layer Gasket Kit, please note that these are upgraded components. The standard bolts and gaskets will not be included with the upgrade option.
For the best performance exhaust manifold for the 5.9L Cummins, trust Diesel Power Source. Quicker spool-up, lower EGTs, better fitment—and unmatched durability.
Learn more about DPS compound turbo kits for 3rd gen Cummins
10 Reviews
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Thumbs up
Good quality part fast shipping
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Great Manifold
Good lookin manifold. Its nice that it comes with tapped ports for a pyrometer. Unable to monitor EGTs at the moment. Only issue I had with the manifold is the bottom stud on #5. Incredibly tight clearances between the manifold and nut making it near impossible to get a wrench or socket on it - i did though.... Other than that fitment and looks are nice!
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Exhaust Manifold Dodge Cummins 5.9 Diesel | 2003-07 5.9 Cummins Exhaust Manifold T3
Fit like a charm and very pleased with the service, very prompt and accurate....
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Awesome Manifold
I've had this manifold for a few months and finally got around to installing it. Not a bad job but do yourself a favor and get a cap screw for the bottom hole on the number 5 cylinder. My truck is running like she is new again. Smoother acceleration. Faster spool up on the turbo. I put a straight edge on it before I installed it and it was perfect. Installation can be a pain but it's well worth it to me. Hoping to put the Artic Air intake on it soon if they get them back in stock.
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Love this manifold
Very happy with the product I received. It was shipped quickly and great customer service.
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Fast
This was shipped ridiculously fast!!! So impressed! Thank you!
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A+++
Great quality product came shipped well packaged and fast delivery And these things look amazing. Well built and happy to support a local Utah business!!!
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5.9L 3rd gen Manifold
picked up my new manifold and installed it over the weekend. I love it! Incredible difference. Silenced all the extra noise under my hood, turbo spools faster, hits hard and sounds amazing. I never have heard my turbo spool so loud. Throttle response is so much better. GREAT PRODUCT! worth the money and drive I did to pick it up!
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Third Gen Exhaust Manifold
Great manifold for a great price. Shipped out same day I ordered. Hardest part of install was getting my old one out.
