Driving Innovation In Diesel Performance

Enforcer Long Block. Built for Cummins.

Deck plate foundation with fire-ring sealing, billet rotating assembly, and a 300 CFM Stage 3 head package.

From $34,124.99
ENFORCER Deck Plate Long Block

ENFORCER Deck Plate Long Block

  • Deck plate 6.7 block with wet iron sleeves
  • FSR billet pistons + tool steel wrist pins
  • ARP 9/16 head + main studs with HD girdle
  • 300 CFM Stage 3 head + billet intake setup
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Enforcer Engine Horsepower Rating

How Much Power Can YOU Make with the Enforcer?

KNOWLEDGE HUB

Everything you need to know about D&J Cummins enforcer long block.

The ENFORCER is fully assembled from the oil pan to the D&J Billet “ENFORCER” LED valve cover (noting listed exclusions), then finished with blueprint/balance steps, ARP 9/16 head & main studs, a D&J HD girdle, and the 300 CFM Stage 3 cylinder head package (5-axis porting, super alloy valves, Stage 3 billet intake, 115# springs, titanium retainers).

  • Deck Plate + Fire-Ring Sealing Deck plate 6.7 block with slip-fit wet iron sleeves and fire-ring cuts into the head and sleeves for extreme sealing strength.
  • Billet Rotating Assembly D&J X-BEAM 1" longer rods, FSR billet pistons with Total Seal rings, and tool steel wrist pins for high-boost durability.
  • 300 CFM Stage 3 Head Package 5-axis CNC porting, super alloy valves, Stage 3 billet replacement intake, 115# springs, titanium retainers, and thread-in soft plugs.
  • ARP 9/16 Studs + HD Girdle ARP 9/16 head studs (torqued to 175 ft/lbs) and ARP 9/16 main studs with a D&J HD girdle for foundation strength.
  • Ready-to-Ship Build Prep Blueprinted and balanced, custom paint available, and shipped pre-lubed with break-in oil and a filter included.

FAQs

What is the ENFORCER deck plate long block?
A 6.7 deck plate Cummins long block assembled from the oil pan to the D&J Billet “ENFORCER” LED valve cover (with listed exclusions) for extreme performance builds.
What year ranges does ENFORCER fit?
The product lists variants for 2007.5–2012 and 2013–2018.
Does ENFORCER include a Stage 3 cylinder head?
Yes, it lists a 300 CFM Stage 3 performance cylinder head package with 5-axis porting and Stage 3 billet intake.
What sealing strategy is used?
The build includes fire ring cuts into the cylinder head and sleeves for high-boost sealing strength.
What studs and bottom-end support are included?
It lists ARP 9/16 head studs, ARP 9/16 main studs, and a D&J HD girdle.
Does it ship pre-lubed?
Yes, it states the long block ships pre-lubed with break-in oil and filter included.
Can I choose a custom paint color?
Yes, it states ENFORCER long blocks can be painted any color.
Is there a core charge and can I avoid it?
Yes, $3,000 core charge, and cores can be sent in beforehand to eliminate it (core parts list applies).