1046070 Exhaust Manifold Kit

Features:

• Fits 2019–2024 RAM 3500–5500 Cab & Chassis
• Thick-wall casting resists high-heat cracking
• Two-piece design reduces thermal stress
• Divided pulse flow improves turbo response
• Pre-drilled EGT port for easy monitoring
• Fully emissions compliant and EPA approved
• Direct bolt-on with stock EGR compatibility
• Includes gaskets, bolts, and spacers
• Ideal upgrade for stock or tuned trucks
• Helps prevent common OEM manifold failures
• SEMA certified and EPA legal in most states
• Covered by 3-year, 75,000-mile warranty

Keep Your Cummins Running Strong For The Long Haul

If your Cummins has been through its share of heavy towing, long hauls, or hard workdays, you know how much stress that heat puts on the stock exhaust manifold. The BD Diesel 1046070 Exhaust Manifold Kit is built to handle that punishment and then some. This upgrade replaces the factory one-piece design that’s known for cracking with a heavy-duty, thick-wall casting that laughs off extreme temperatures. Its two-piece slip joint allows for natural expansion and contraction, so your manifold won’t split under constant heat cycles. You’ll also notice better throttle response and turbo spool thanks to BD’s divided pulse design, which keeps exhaust flow smooth and consistent. Everything you need for the install comes right in the box, from bolts and spacers to gaskets, making this a true bolt-on replacement. Whether your truck is bone stock or tuned for towing, this manifold brings reliability and performance back where it belongs, under your right foot.

Built With Smart Engineering To Beat The Heat

Under the hood, every detail of the BD Diesel 1046070 Exhaust Manifold Kit is engineered for long-term performance. The thick-wall cast iron construction is designed to withstand the high exhaust temperatures that often destroy OEM manifolds on the 6.7L Cummins. By using a two-piece slip joint in the center, the manifold can expand and contract naturally without building stress that leads to cracks. Its divided pulse design keeps exhaust gases separated between cylinders, improving turbocharger efficiency and maintaining consistent backpressure for smoother power delivery. BD also pre-drilled an EGT probe port, making it simple to install aftermarket gauges for those who like to monitor their temps closely. Fully emissions compliant and compatible with the factory EGR system, it’s a clean, legal, and smart upgrade that drops right into place. With a 36-month or 75,000-mile warranty, this manifold gives peace of mind that your Cummins will stay cooler, stronger, and ready for anything the road throws at it.

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.
• Not compatible with RAM 2500 or pickup variants.
• Replaces OEM part number 68444859AA.
• Includes all hardware and gaskets for full installation.
• Intended for customers needing a full manifold replacement kit.
• Fully emissions compliant under federal EPA standards.
• Not legal for use on vehicles registered in California.
• SEMA certified under SC-BDD01-0155 for added assurance.
• Helps prevent known cracking issues with factory manifolds.
• Compatible with stock EGR system for easy fitment.
• Ideal for both stock trucks and mild performance builds.
• Installation requires approximately 7.5 hours of labor.

Install Instructions