Driving Innovation In Diesel Performance

Short Blocks. Built for Cummins.

D&J short blocks are fully remanufactured and designed for 5.9L and 6.7L Cummins applications. Whether you're replacing a failed bottom end to a full custom build these short blocks give you a proven foundation.

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Fits

2003-2007 Dodge Ram 5.9 Cummins

2 products
Price $5,953.99
Essential Reman Short Block | 2003-2007 Dodge Ram 5.9 Cummins

Essential Reman Short Block

  • Ideal for restoring a worn-out 5.9 Cummins without replacing unnecessary components.
  • Perfect for work trucks and reliable daily transportation.
  • Reuse your existing top-end components and reduce downtime.
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Price $6,597.99
Precision Plus Reman Short Block | 2003-2007 Dodge Ram 5.9 Cummins

Precision Plus Reman Short Block

  • A stronger foundation for performance-minded 5.9 owners.
  • Designed for trucks that tow hard or plan future modifications.
  • Critical clearances are measured and corrected for long-term reliability.
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Fits

2007.5-2018 Dodge Ram 6.7 Cummins

2 products
Price $6,173.99
Essential Reman Short Block | 2007.5-2018 Dodge Ram 6.7 Cummins

Essential Reman Short Block

  • Perfect for stock trucks needing dependable replacement performance.
  • Fresh pistons, rings, and bearings help restore reliability.
  • Save money by reusing your existing top-end components.
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Price $6,813.99
Precision Plus Reman Short Block | 2007.5-2018 Dodge Ram 6.7 Cummins

Precision Plus Reman Short Block

  • Built for higher stress applications with tighter machining standards.
  • Ideal for customers planning larger turbos, injectors and tuning,.
  • CNC boring, honing, decking, and blueprinting help improve long-term reliability.
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KNOWLEDGE HUB

Everything you need to know about D&J Cummins short blocks

A failing bottom end can quickly turn into a full engine replacement but it doesn’t always have to. If your cylinder head, fuel system, turbo setup, and accessories are still usable, a short block can save thousands while giving you a properly machined foundation. Learn the differences between Essential and Precision Plus short blocks, what’s included, who they’re built for, and how to choose the right Cummins short block for your truck.

  • Fully Remanufactured Bottom Ends Every D&J short block is completely torn down, cleaned, inspected, machined, and reassembled using strict tolerances. This isn’t a junkyard pull-out or quick refresh rebuild.
  • CNC Blueprinted Machining Blocks are precision bored, honed, and surfaced to restore critical tolerances for proper sealing, compression, and long-term durability.
  • New Internal Components Built with new pistons, rings, bearings, and critical wear components to help improve reliability compared to reused factory internals.
  • Built for Work Trucks & Performance Builds Whether you tow daily, run larger injectors, or simply need a reliable replacement, D&J short blocks provide a stronger foundation than questionable local rebuilds.
  • Save Money Over a Complete Long Block If your cylinder head, valvetrain, turbo, injectors, and accessories are still in good shape, a short block allows you to reuse expensive components while replacing the most failure-prone portion of the engine.

FAQs

What is included in a D&J short block?
A D&J short block includes the engine block, crankshaft, pistons, rods, bearings, and internal rotating assembly components. It does not include the cylinder head, injectors, turbocharger, valve train accessories, or external bolt-on components.
What’s the difference between a short block and a long block?
A short block includes the lower half of the engine. A long block includes the cylinder head, valvetrain components, and additional assembled parts. Short blocks are ideal when your top-end components are still usable.
Is a short block cheaper than a long block?
Yes. Because you’re reusing major upper-engine components, short blocks typically cost significantly less than replacing the entire engine.
Who should buy an Essential short block?
The Essential series is best for stock replacement trucks, daily drivers, fleet trucks, and towing applications looking for dependable OEM-style reliability.
Who should buy a Precision Plus short block?
Precision Plus short blocks are ideal for customers planning future upgrades, heavier towing demands, or wanting additional durability beyond a standard rebuild.
Can I reuse my existing cylinder head?
Yes, if it passes inspection. Many customers pair these with a rebuilt D&J head for maximum reliability.
What causes a Cummins short block failure?
Common causes include piston damage, excessive EGTs, injector failure, bearing wear, oil contamination, overheating, and poor tuning.
Are these good for towing?
Absolutely. Many customers use these in heavy towing applications where reliability matters most.
Can I add performance upgrades later?
Yes. Many customers install a short block now and upgrade turbochargers, injectors, or fuel systems later.
Why choose D&J over a local machine shop rebuild?
D&J specializes in Cummins engines every day. Their machining processes, tolerances, and diesel-specific experience help eliminate many common rebuild mistakes.