BD Diesel DJPLB100079 Heavy Hauler Long Block Engine | 2021-2024 RAM 2500/3500 6.7L Cummins

Features:

• Rated for up to 700 HP
• Built for towing and heavy-duty applications
• Stage 1 high-performance cylinder head
• 5-axis CNC ported for increased airflow
• Oversized heavy-duty intake and exhaust seats
• Street/towing camshaft lowers EGTs
• Reduces EGTs by 200-300 degrees
• Improves fuel efficiency and engine durability
• Replaces hydraulic lifters with solid flat tappets
• Adjustable rockers for greater valvetrain longevity
• Fully assembled and pre-lubed for easy install
• Includes oil pan, front cover, and rocker box

Heavy Hauler Long Block Crate Engine for New Gen Cummins

When your truck is built to haul heavy loads, tackle tough jobs, and rack up serious mileage, your engine needs to be just as tough. The stock 6.7L Cummins is a solid platform, but when you push it hard day after day, weaknesses start to show. Whether it’s excessive heat, valvetrain wear, or head gasket issues from high cylinder pressure, the factory setup has its limits. The BD Diesel Heavy Hauler Long Block is built to eliminate those weak points, giving you a stronger, more efficient, and more reliable engine designed for heavy-duty work and high-performance towing. This long block is built for durability, starting with the Stage 1 High-Performance Cylinder Head. Unlike stock heads that can restrict airflow and struggle with heat dissipation, this version is 5-axis CNC-ported for increased efficiency. The oversized heavy-duty intake and exhaust valve seats improve airflow and longevity, helping the engine breathe better under load. That means smoother power delivery, reduced strain on the turbo, and lower exhaust gas temperatures—crucial for trucks that spend long hours towing or working hard.

Eliminates Most Common Failure Points

One of the biggest weaknesses in the 2021+ Cummins engine is the hydraulic roller lifter setup. Over time, these lifters can fail, leading to expensive repairs and even catastrophic engine damage. BD Diesel addresses this issue by replacing the hydraulic system with solid flat tappets and adjustable rockers—proven components that offer increased durability and longevity. By incorporating 2018 and older components into this build, they’ve eliminated one of the most common failure points of modern Cummins engines, making this long block an ideal choice for work trucks that demand reliability. Heat is another big concern in any heavy-duty application, and that’s where the upgraded camshaft comes into play. The included street/towing performance camshaft is specifically designed to lower EGTs by 200-300 degrees. Keeping temperatures in check is key to engine longevity, and this camshaft helps your truck run cooler while improving fuel efficiency along the way.

High-Quality Hardware with Direct-Fit Install

To handle the extra stress of towing and performance applications, BD Diesel reinforces this engine with custom ARP 9/16” head studs. These provide superior clamping force, reducing the risk of head gasket failure under high boost and heavy loads. Whether you’re running a tuned truck or just need extra durability for long-haul towing, this upgrade ensures your engine stays sealed and secure in extreme conditions. What's more, installation is made simple with a fully assembled, pre-lubed design. This long block comes complete with an oil pan, front cover, and machined rocker box, making it a direct replacement for 2021-2024 Ram 6.7L Cummins applications. Instead of waiting on a full rebuild or dealing with sourcing individual components, you can drop this engine in and get your truck back to work with minimal downtime.

Fits: 2021, 2022, 2023, 2024 Ram 6.7L Cummins

Core Charge: Refundable Core Charge of $3500 applies.

Note: Not for sale on licensed California vehicles