BD Diesel DJPLB100015 Heavy Hauler Long Block Engine | 2004.5-2007 Ram 5.9L Cummins

Features:

• Rated for up to 700 HP
• Stage 1 high-performance cylinder head
• 5-axis CNC ported for maximum airflow
• Heavy-duty oversized intake and exhaust seats
• Street/towing camshaft lowers EGTs
• Reduces EGTs by 200-300 degrees
• Improves efficiency and fuel economy
• Custom ARP 9/16" head studs
• Superior head-to-block sealing under high boost
• Fully assembled and pre-lubed for quick install
• Includes oil pan, front cover, and rocker box

Heavy-Duty Crate Engine Designed for Heavy Hauling

When you rely on your truck for heavy towing and demanding workloads, you can’t afford to have an engine that struggles under pressure. Over time, high mileage, extreme heat, and constant strain can wear down the stock 5.9L Cummins, leading to power loss, higher EGTs, and even catastrophic failure. Instead of sinking time and money into a questionable rebuild, upgrading to the BD Diesel Heavy Hauler Long Block gives you a fully assembled, high-performance engine built specifically for towing, hauling, and work applications. It’s designed to handle extreme conditions while improving efficiency, durability, and overall engine longevity. One of the key upgrades in this long block is the D&J Stage 1 High-Performance Cylinder Head. Unlike a stock head, this version is 5-axis CNC-ported to maximize airflow, helping the engine breathe more efficiently under load. It also features heavy-duty oversized intake and exhaust valve seats, which provide better heat dissipation and long-term durability. Whether you’re pulling a trailer up a steep grade or running your truck hard every day, these upgrades help maintain power while reducing the risk of head-related failures.

Impressive Heat Management with Heavy-Duty Hardware

Heat management is another area where this engine stands out. A custom street/towing camshaft is designed to lower exhaust gas temperatures by 200-300 degrees, improving efficiency and fuel economy. If you’ve ever watched your EGTs climb while towing a heavy load, you know how important this is for both performance and engine longevity. With better combustion and reduced heat buildup, your truck runs cooler and more efficiently, even under sustained load. To ensure the engine can handle high boost and heavy workloads without issue, BD Diesel includes custom ARP 9/16” head studs. These provide superior clamping force compared to stock fasteners, reducing the risk of head gasket failure in high-boost applications. Whether you're running a tuned truck or need extra strength for heavy towing, this reinforcement helps keep the head securely sealed to the block under extreme pressure.

Bolt-On Installation

This long block comes fully assembled and pre-lubed with break-in oil, making installation as smooth as possible. It includes an oil pan, front cover, and rocker box, so you’re not stuck sourcing extra components before getting your truck back on the road. Designed as a direct replacement for 2004.5-2007 Dodge Ram 2500 and 3500 models, it eliminates the hassle of custom modifications, ensuring a straightforward swap.

Fits: 2004.5, 2005, 2006, 2007 Dodge / Ram 5.9L Cummins

Core Charge: Refundable Core Charge of $3000 applies.

Note: Not for sale on licensed California vehicles