Driving Innovation In Diesel Performance

Essential Reman Long Blocks. Built for Cummins.

The Essential Reman Long Block is the affordable, dependable choice to get your truck back on the road with confidence.

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Price $7,499.99
6.7 ESSENTIAL REMAN LONG BLOCK

6.7 ESSENTIAL REMAN LONG BLOCK

  • Full disassembly + crack-check inspection process
  • CNC blueprinted bore/hone + deck surface machining
  • Clean-room assembly with measured clearances
  • HP reman cylinder head with heavy-duty seats + precision valve job
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Price $7,499.99
5.9 COMMON RAIL ESSENTIAL REMAN LONG BLOCK

5.9 COMMON RAIL ESSENTIAL REMAN LONG BLOCK

  • Full disassembly + crack-check inspection process
  • CNC blueprinted bore/hone + deck surface machining
  • Clean-room assembly with measured clearances
  • HP reman cylinder head with heavy-duty seats + precision valve job
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KNOWLEDGE HUB

Everything you need to know about D&J Cummins essential long blocks.

Every Essential Long Block follows a repeatable process full disassembly and crack-check, CNC blueprint machining, measured clearances, and clean-room assembly then finishes with an HP reman head featuring heavy-duty seats and a precision valve job. We strongly recommend replacing the oil cooler and oil pump during install to protect your new long block.

  • Built for Cummins Reliability An affordable reman long block designed for dependable daily driving, work use, and clean drivability.
  • Comprehensive Inspection Process Disassembled, crack-checked, inspected, threads chased, blasted, and cleaned before machining begins.
  • CNC Blueprint Machining CNC bored, honed, and deck surfaced with crank inspection/repair checks as needed.
  • Measured Clearances, Corrected Ring Gaps Clearances and surfaces are measured and verified; ring gaps corrected as needed for consistency.
  • Clean-Room Assembly Assembled in a clean room by skilled technicians to reduce contamination risk.

FAQs

What is an Essential Reman Long Block?
It’s an affordable, reliability-focused reman long block built with a full inspection, CNC machining, and clean-room assembly process.
Which years does the 5.9 Common Rail Essential Long Block fit?
The 5.9 CR Essential Reman Long Block is listed as compatible with common rail models from 2003–2007.
Which years does the 6.7 Essential Reman Long Block fit?
The 6.7 Essential Reman Long Block is listed as compatible with common rail models from 2007–2018.
Does the Essential Long Block include a cylinder head?
Yes, both pages list an HP Reman Cylinder Head included in the build.
What’s done to the cylinder head during reman?
The head is disassembled, crack-checked, fitted with heavy-duty seats, and finished with a precision valve job before pressure-checking.
What parts are new in the build?
The build list includes new pistons, bolts, bearings, lifters, and all-new upper/lower gasket sets.
What parts are reconditioned?
The build list includes a reconditioned crankshaft, reconditioned OEM connecting rods, and a reconditioned stock camshaft.
What do you recommend replacing during install?
The pages highly recommend replacing the oil cooler and oil pump for optimal performance and longevity.