Driving Innovation In Diesel Performance

Precision Plus Long Blocks. Built for Cummins.

Common Rail Precision Plus long blocks with heavy-duty seats, bronze guides, and thread-in soft plugs.

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From $9,633.99
6.7 COMMON RAIL CUMMINS PRECISION PLUS REMAN LONG BLOCK

6.7 COMMON RAIL CUMMINS PRECISION PLUS REMAN LONG BLOCK

  • Fully assembled long block with oil pan installed
  • Precision Plus reman head with HD seats
  • Thread-in soft plugs under valve cover
  • Pressure-checked and pre-lubed for install
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Price $11,875.99
19+ 6.7 COMMON RAIL CUMMINS PRECISION PLUS REMAN LONG BLOCK

19+ 6.7 COMMON RAIL CUMMINS PRECISION PLUS REMAN LONG BLOCK

  • Fully assembled long block with key covers installed
  • Reman cylinder head included for clean sealing
  • Updated valvetrain: solid tappets + adjustable rockers
  • Year-specific timing housing / front cover used
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From $9,633.99
5.9 COMMON RAIL CUMMINS PRECISION PLUS REMAN LONG BLOCK

5.9 COMMON RAIL CUMMINS PRECISION PLUS REMAN LONG BLOCK

  • Fully assembled long block with oil pan installed
  • Precision Plus reman cylinder head included
  • Optional ARP 625 head studs available
  • Pre-lubed and pressure-checked for install
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KNOWLEDGE HUB

Everything you need to know about D&J Cummins precision plus engines.

Precision Plus is the “reliable upgrade” reman ideal when you want a dependable long block that directly targets common head-related failures while staying budget-friendly versus higher-stage performance series. Choose your year range (5.9 CR, 6.7 CR, or 2019+ 6.7) and build path, then plan supporting items like proper priming, clean oil/coolant systems, and correct break-in.

  • CNC Blueprint Machining CNC bore/hone/deck work with measured clearances for consistent sealing and durability.
  • Precision Plus Cylinder Head Package Reman head built with heavy-duty seats, bronze guides, and a precision CNC valve job.
  • Thread-In Soft Plugs Included Thread-in soft plugs under the valve cover help prevent common soft plug failures.
  • New Wear Components Installed Built with new pistons, new bearings, new bolts, new gaskets, and new tappets.
  • Ready-to-Install Prep Engines ship pre-lubed with break-in oil and a filter to support first start. selling_point: Pressure-Checked Before Shipping

FAQs

What is a Precision Plus reman long block?
A fully assembled reman long block built with CNC blueprint machining, clean-room assembly, and a durability-focused cylinder head package.
What engines does this collection cover?
Precision Plus long blocks are offered for 5.9L Common Rail, 6.7L Common Rail, and 2019+ 6.7L applications depending on the product option.
What makes the cylinder head “Precision Plus”?
The head package includes heavy-duty valve seats, bronze guides, a precision CNC valve job, and thread-in soft plugs under the valve cover.
Do these long blocks ship assembled and ready to install?
Yes, these ship as fully assembled long blocks with key covers installed for streamlined installation.
Do they ship with break-in oil?
Yes, these engines ship pre-lubed with break-in oil and a filter to support first start.
Are the cooling system and crankcase checked before shipping?
Yes, cooling system and crankcase are pressure-checked to help verify no leaks prior to installation.
What’s included in the build list?
Build lists include new pistons, new bearings, new bolts, new gaskets, new tappets, and a Precision Plus reman cylinder head package.
Is there a core charge?
Yes, core requirements and charges vary by product; cores can typically be sent in beforehand to reduce or eliminate the core charge.