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  • FORD POWERSTROKE
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  • CUMMINS CONVERSION PARTS
  • CPP GEAR
  • USED PARTS
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    • 5.9 L 24V Cummins Long Blocks (2003–2007)

    If you are replacing or rebuilding a 2003-2007 Dodge Ram common rail engine, our 5.9L 24V Cummins long blocks for 2003-2007 trucks provide a reliable and more complete engine solution. A long block is ideal when you need more than a short block and want a fully assembled top-end included. This reduces installation time, minimizes parts transfer, and gives you a dependable foundation for stock replacement, towing builds, work trucks, and performance applications.

    Compared to a short block, a 5.9 Cummins long block includes the cylinder head and valvetrain components, making it a better option when your existing top-end parts are worn, damaged, or no longer worth reusing. It provides a strong balance between cost and convenience, allowing you to get back on the road faster without stepping up to a full crate engine. Whether you are rebuilding a daily driver, upgrading a tow rig, or building a durable common rail setup, CPP Diesel helps simplify the process with quality Cummins engine options and real diesel experience.

    Shop our 2003-2007 5.9L 24V Cummins long blocks below and choose the configuration that fits your project. If you are looking for a more budget-friendly bottom-end option, compare our 5.9L 24V Cummins short blocks. For complete drop-in solutions across multiple generations, explore our reman Cummins engine options to find the right setup for your truck and build goals.

    What Comes In A 5.9 Cummins Long Block?

    A 5.9 Cummins long block includes the engine block, crankshaft, pistons, bearings, cylinder head, and valvetrain components, professionally assembled and ready for installation. This gives you a more complete engine package than a short block, while still allowing flexibility for external components such as fuel system parts, manifolds, turbochargers, and accessories. For many builds, a long block offers the best balance between simplicity, cost, and reliability.

    Long Block Vs Short Block Cummins Engines

    A long block includes both the bottom end and the cylinder head assembly, while a short block only includes the lower-end rotating components. If your head or valvetrain components are worn or questionable, a long block is typically the better option because it reduces installation time and limits the need for additional parts. If your top-end components are still in good condition and you want to keep costs lower, a short block may be the better choice.

    Need help choosing the right Cummins long block for your build? Call CPP Diesel for expert guidance before you buy.

    5.9 Cummins Long Block FAQ

    What is included in a 5.9L 24V Cummins long block?
    A 5.9L 24V Cummins long block includes the block, crankshaft, pistons, bearings, cylinder head, and valvetrain components. It provides a more complete engine assembly than a short block and simplifies installation.

    Is this long block correct for 2003-2007 Dodge Ram trucks?
    Yes. These long blocks are designed for 2003-2007 5.9L common rail Cummins engines, making them ideal for third-generation Dodge Ram applications.

    Why choose a long block instead of a short block?
    A long block is the better option when your cylinder head or valvetrain components are worn, damaged, or not worth reusing. It reduces the need for additional parts and speeds up the rebuild process.

    Is a common rail long block good for towing or performance builds?
    Yes. A properly built 5.9L common rail long block is an excellent foundation for stock replacement, towing applications, work trucks, and performance builds requiring durability.

    Do I still need external parts with a long block?
    Yes. While a long block is more complete than a short block, you will still need to install external components such as fuel system parts, manifolds, turbochargers, and accessories depending on your setup.

    Are these long blocks inspected before shipping?
    Yes. Each long block is checked for assembly quality, cleanliness, and proper specifications before shipping so you can install with confidence.

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