The Ultimate 6.7L Cummins Refresh: 2019+ Common Rail Precision Plus Reman Long Block

When Dodge updated the 6.7L Cummins engine in 2019, they introduced many new changes including a high pressure common rail fuel system and a compacted graphite iron block. Unfortunately, many 5th gen Cummins owners have found that factory components can still have weaknesses.

If your 2019+ truck needs an engine, whether due to a high mileage failure or because you want a preventative, solid foundation for towing or daily driving, you have a decision. Do you take a chance on a basic factory replacement, or do you step up to an engine that's built to outlast the truck?

At D&J Precision Machine, we engineered the 2019+ 6.7 Common Rail Cummins Precision Plus Reman Long Block to be the perfect option for truck owners who demand reliability, durability, & drivability for maximum value.

Here is a look at what makes this engine the perfect upgrade for your 2019+ Cummins!

Fixing the Factory Issues

The 2019+ factory Cummins introduced hydraulic roller lifters. While great on paper for maintenance, they quickly became a well known issue for many.

On this long block, we eliminated the hydraulic roller lifters entirely. Instead, we converted the valvetrain back to reliable solid flat tappets and adjustable rockers. This single upgrade wipes out a major factory issue, ensuring your valvetrain remains quiet, consistent, and durable under heavy use.

Machined for Perfection

Every Precision Plus Long Block goes through an exhaustive, rigorous blueprinting process in our Ohio facility. We treat every engine with the same level of care that goes into our competition builds:

• CNC Machining & Blueprinting: Blocks are fully disassembled, crack-checked, blasted, and CNC-blueprinted. We bore, hone, and deck surface the blocks to exact tolerances, checking every crankshaft for absolute straightness.
• The Assembly: Our engines are put together by master technicians in a climate controlled, clean space. We meticulously measure bearing clearances, piston to wall clearance, and piston protrusion to guarantee proper compression and oil control.
• Heavy Duty Cylinder Head Upgrades: A factory head can drop valve seats. We fix this by installing heavy duty, extra large intake and exhaust seats, HD bronze valve guides, thread-in soft plugs under the valve cover, and performing a high-precision CNC valve job using our state of the art Newen seat and guide machine.

Premium Components

We don't reuse parts that compromise the life of your investment. This long block features:

• New pistons, main bearings, and rod bearings.
• Brand new oil pump and new oil cooler (critical to prevent old debris from contaminating your new build).
• Full ARP Head Stud upgrade (providing significantly superior clamping force over standard factory bolts to completely safeguard your head gasket).

Ready to Drop In

Time is money, especially if your truck is your livelihood. The Precision Plus Long Block arrives at your shop fully assembled and pre-lubed. It includes the oil pan, year specific front covers, and timing gear housings already installed and sealed. It even ships painted black, complete with break-in oil and an oil filter so you can hit the ground running.

Who is this Long Block Built For?

Rated comfortably for up to 600 HP, the 2019+ 6.7L Common Rail Cummins Precision Plus Reman Long Block is designed for the truck owner who wants an engine that handles real world workloads without becoming a liability down the road. It’s ideal for:

• Heavy Towing: Hotshot haulers, campers, and work trailers.
• Daily Drivers: Truck owners planning to keep their 5th gen Ram for the long haul.
• Street Performance: Drivers running mild to moderate tunes who want the peace of mind that ARP head studs provide.

Ready for a Solid Foundation?

Don't settle for a basic reman that leaves factory weak points intact. Upgrade your truck with an engine engineered by diesel experts who know exactly what it takes to make a Cummins last.

Check out the 19+ 6.7 Common Rail Cummins Precision Plus Long Block here.