BD Diesel 1045970 Exhaust Manifold | 2019-2024 RAM 3500/4500/5500 Cab/Chassis 6.7L Cummins

Features:

• Fits 2019–2024 RAM 3500–5500 Cab & Chassis
• Heavy-duty thick-wall casting resists cracking
• Two-piece slip joint reduces thermal stress
• Divided pulse flow boosts turbo performance
• Pre-drilled EGT port for easy gauge installs
• Includes turbo and EGR studs for secure fit
• Compatible with factory EGR components
• Direct stock replacement with no modifications
• Ideal for stock or tuned work trucks
• Legal under federal EPA guidelines (not California)
• SEMA certified under SC-BDD01-0155
• Covered by 3-year, 75,000-mile parts warranty

Upgrade The Part That Always Lets You Down

If you’ve been running your 6.7L Cummins hard, chances are your factory manifold is already on borrowed time. BD Diesel’s 1045970 Exhaust Manifold is built to fix one of the most common weak points in the RAM Cab & Chassis lineup. It’s made specifically for 2019-2024 RAM 3500, 4500, and 5500 workhorses that don’t have time for downtime. The factory cast manifold is known to crack under repeated heat cycles, especially in trucks that tow, haul, or idle for long hours. BD’s solution is a thick-wall casting with a smart slip-joint in the center, so it can expand and contract without tearing itself apart. Whether your truck is bone stock or tuned for more output, this manifold holds strong and keeps exhaust flowing where it should. The fit is direct, the install is clean, and the reliability is something you’ll feel every time you roll into a job site. If you’re serious about keeping your Cummins running longer, this is one part that deserves the upgrade.

Purpose Built For Heat Load And Pulse Efficiency

The BD Diesel 1045970 Exhaust Manifold is engineered to outperform the failure-prone OEM part that comes on many RAM Cab & Chassis trucks. It uses a thick-wall cast iron design to handle the brutal exhaust heat generated by the 6.7L Cummins under load. The center slip joint allows for natural movement during thermal expansion, helping prevent the cracking that often shows up on long-haul or heavy-duty work trucks. Its divided pulse design channels exhaust flow more efficiently, improving turbo spool and maintaining balanced backpressure across all cylinders. The result is a smoother, more responsive driving experience with less strain on the turbocharger. This manifold is pre-drilled for an EGT probe, making it easier to install aftermarket gauges for temperature monitoring. It’s a direct-fit replacement that works with your factory EGR components and requires no special tuning or custom parts. With included turbo and EGR studs, plus a 36-month or 75,000-mile warranty, it delivers both performance and peace of mind.

Fitment: 2019, 2020, 2021, 2022, 2023, 2024 RAM 3500/4500/5500 Cab/Chassis 6.7L Cummins

Notes:

• Fits 2019–2024 RAM 3500, 4500, and 5500 Cab & Chassis models with 6.7L Cummins.
• Does not fit RAM 2500 or 3500 pickup models.
• Replaces OEM manifold part number 68444859AA.
• Standalone manifold only, does not include gaskets or mounting hardware.
• Includes turbo and EGR studs for proper reinstallation.
• Emissions compliant under EPA regulations, but not approved for use in California.
• SEMA certified under number SC-BDD01-0155 for legal use in most states.
• Pre-drilled EGT port allows easy addition of aftermarket gauges.
• Designed to address known cracking issues in factory manifolds.
• Compatible with stock EGR system and turbocharger.
• Ideal for high-mileage trucks or those frequently towing or idling.
• Best suited for customers who already have hardware or prefer a custom install.

Install Instructions