Precision Engineering for Optimal Durability

Our Long Blocks undergo rigorous processes – disassembly, crack-checking, cleaning, and CNC machining – to ensure maximum durability and performance. With meticulous attention to detail, including fire ring grooves and custom ARP head studs, we guarantee a robust head-to-block seal.

State-of-the-Art Cylinder Heads for Enhanced Performance

The D&J Stage 1 Performance Cylinder Heads are reengineered with heavy-duty seats, 5-axis CNC porting, and high-performance valve jobs, ensuring superior power and efficiency.

Blueprint and Balanced for Peak Efficiency

Every Long Block is meticulously blueprinted and balanced, with precise oil clearance measurements and file-fit rings. Pre-lubed with break-in oil and filter, our blocks are ready for immediate performance enhancement.

Standard Build Featuring Industry-Leading Components

Our standard build includes D&J X-Beam Billet Rods, new pistons, ARP studs, heavy-duty pushrods, and more, ensuring a high-caliber upgrade for your vehicle.

Invest in the D&J Precision Machine Street Performance 6.7 Cummins Long Block for a remarkable upgrade in your vehicle’s performance, reliability, and efficiency. Our commitment to quality and precision engineering guarantees an unparalleled driving experience.
Sidebar

Generations

Product Type

Brand

Filter
  • 10
  • 15
  • 20
  • 25
  • 30
  • 50
  • Featured
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
Sort

Sort by:

  • Featured
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
  • Street Performance 5.9 Cummins Common Rail Long Block
    Choose Options

    Street Performance 5.9 Cummins Common Rail Long Block

    D&J Precision Machine Street Performance 5.9 Cummins Long Block   Our Street Performance 5.9 Cummins Long Blocks come fully assembled, including the oil pan, rear crank seal, front cover and crank seal, and oil filter housing. Featuring our X-Beam Stock Length Billet Rods and...
    $15,499.99
    $15,499.99
    Choose Options
  • Street Performance 6.7 Cummins Common Rail Long Block
    Choose Options

    Street Performance 6.7 Cummins Common Rail Long Block

    D&J Precision Machine Street Performance 6.7 Cummins Long Block Our Street Performance 6.7 Cummins Long Blocks come fully assembled, including the oil pan, rear crank seal, front cover and crank seal, and oil filter housing. Featuring our X-Beam Stock Length Billet Rods and Stage...
    $15,499.99
    $15,499.99
    Choose Options