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A Pulse-Divided Manifold Built to Survive DPF Heat Cycles
BD Diesel's standalone exhaust manifold replaces the factory 2019-2024 Ram 2500/3500 6.7L Cummins manifold with a thick-wall, high-silicon ductile iron casting engineered to resist the cracking common to stock manifolds under repeated DPF regeneration heat cycles. Its precision slip joint absorbs thermal expansion while a fully divided pulse design improves exhaust flow to the turbo.
Key Features
- High-silicon ductile iron thick-wall casting resists high-heat cracking
- Precision slip joint reduces cyclic thermal stress versus the factory manifold
- Divided pulse manifold design improves exhaust flow and turbo spool
- Pre-drilled EGT probe port for easy pyrometer installation
- Fully EGR-compatible, direct stock replacement location
- Includes turbo and EGR mounting studs
Fitment
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2024 | Ram | 2500 | Big Horn |
| 2019-2024 | Ram | 2500 | Laramie |
| 2019-2021 | Ram | 2500 | Laramie Longhorn |
| 2019-2024 | Ram | 2500 | Limited |
| 2021-2024 | Ram | 2500 | Limited Longhorn |
| 2019-2024 | Ram | 2500 | Lone Star |
| 2023-2024 | Ram | 2500 | Rebel |
| 2024 | Ram | 2500 | Special Service |
| 2019-2024 | Ram | 2500 | Tradesman |
| 2019-2024 | Ram | 3500 | Big Horn |
| 2019-2024 | Ram | 3500 | Laramie |
| 2019-2020 | Ram | 3500 | Laramie Longhorn |
| 2019-2024 | Ram | 3500 | Limited |
| 2021-2024 | Ram | 3500 | Limited Longhorn |
| 2019-2022 | Ram | 3500 | Lone Star |
| 2019-2024 | Ram | 3500 | SLT |
| 2024 | Ram | 3500 | Special Service |
| 2019-2024 | Ram | 3500 | Tradesman |
Specifications
| Detail | Value |
|---|---|
| Manufacturer part number | 1045969 |
| Material | High-silicon ductile iron |
| Design | Fully divided pulse manifold with slip joint |
| EGT probe port | Pre-drilled |
| Complete kit version available | PN 1046069, includes bolts, spacers, and gaskets |
What's Included
- 1 exhaust manifold
- Turbo and EGR mounting studs
About BD Diesel
BD Diesel Performance has engineered diesel turbochargers, exhaust manifolds, and drivetrain upgrades in Abbotsford, British Columbia since 1978, focused on emissions-compliant, drop-in-fit heavy-duty diesel performance parts backed by SEMA-certified testing.
FAQ
Does this manifold include the gaskets and bolts needed for installation?No, this standalone manifold listing includes the manifold and mounting studs, gaskets/bolts/spacers are included in the separate complete kit version, PN 1046069.
What causes the factory manifold to crack?Repeated heat cycling from DPF regeneration events puts thermal stress on the factory manifold's rigid casting, leading to cracks over time.
Does this manifold work with the factory EGR system?Yes, it is fully EGR-compatible and requires no EGR system modifications.
Is this manifold pre-drilled for a pyrometer?Yes, an EGT probe port is pre-drilled for easy aftermarket pyrometer installation.
Does this manifold fit in the stock location?Yes, it is a direct stock replacement and installs in the factory manifold location.
What turbo does this manifold work with?It is designed to work with the factory turbo or a BD Diesel Screamer turbo upgrade using the stock-style flange.
Is this manifold CARB compliant?This manifold is marked Non-CARB compliant, confirm current emissions compliance for your state before ordering if required.
What is BD Diesel's warranty on this manifold?Contact BD Diesel or refer to the included documentation for the specific parts warranty terms on the standalone manifold.
Installation Instructions
- Allow the engine to fully cool, then disconnect the negative battery terminal.
- Remove the turbocharger, EGR cooler connections, and heat shields to access the factory exhaust manifold per the vehicle service manual.
- Remove the factory exhaust manifold and clean all cylinder head gasket surfaces to bright metal.
- Install new gaskets and the BD Diesel manifold using the supplied Grade 10.9 bolts and spacers, torquing in a center-out crisscross pattern to 43 N路m (32 ft-lb).
- Reinstall the turbocharger, torquing turbo flange nuts in a crisscross pattern to 43 N路m (32 ft-lb).
- Reconnect the EGR cooler, heat shields, and delta-P line per factory routing.
- Reconnect the battery, start the engine, and check for exhaust leaks.
- Re-torque all manifold and turbo fasteners after the first full heat cycle.
Prop 65 Warning
This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
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