D&J Precision Machine Products

Heavy Hauler 12 Valve P-Pump Cummins Long Block Our Heavy Hauler 12 Valve Cummins Long Blocks come fully assembled, including the oil pan, rear crank seal, front cover and crank seal, and oil filter housing, along with our HP Reman Cylinder Head utilizing a...

Stage 2 6.7 CR Cummins Performance Head Our Stage 2 6.7 CR Cummins Performance Head is designed for the performance enthusiast. It includes everything in our Stage 1 Cummins Performance Head plus a D&J Stage 2 6.7 CR Billet Intake Manifold, thread-in soft plugs...

Performance Series 5.9 CR Block At D&J Precision Machine, we understand the value of providing our customers with the option to rebuild their own engines. With that in mind, we present a budget-friendly, performance focused alternative to our full in-house engine builds: the Performance...

Performance Series 6.7 Block At D&J Precision Machine, we understand the value of providing our customers with the option to rebuild their own engines. With that in mind, we present a budget-friendly alternative to our full in-house engine builds: the Performance Series Block. Key...

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...

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...

Billet Stage 2 Intake Manifold   The Billet Stage 2 Intake Manifold is specifically designed for our Stage 2 cylinder heads. It is available with either 5.9 intake and fuel setups or 6.7 intake and fuel setups. These intakes utilize the stock intake horn...

Billet Direct Drive Mechanical Lift Pump Kit Say goodbye to the complications of dual electric lift pumps. Our Billet Direct Drive Mechanical Lift Pump Kit offers a streamlined solution with a robust 300GPH capacity, proven to support over 2200hp on one of our D&J...

Stage 4 6.7L Cummins Performance Head Our Stage 4 Cummins Performance Head is designed for extreme high performance. It includes everything in our Stage 3 Head, along with a D&J Stage 4 Billet Runner Style Intake Manifold. This head can only be used with...

FEATURES Made from aircraft-quality 6061-T6 aluminum for exceptional durability and strength Comes with all stainless steel fasteners to ensure longevity and resistance to corrosion Retains factory CCV system, no catch can or other components required Includes D&J Powder Coated oil cap cover ABOUT THIS...

FEATURES Precision Machined & Fully Remanufactured – CNC blue printed, bored, honed and surfaced. Comprehensive inspection checks for cracks, threaded holes, crank straightness and size and all other critical areas addressed. All critical dimensions including bearing clearances, piston-to-wall clearance, piston protrusion, deck and hone...

Features Precision Machined & Fully Remanufactured – CNC blue printed, bored, honed and surfaced. Comprehensive inspection checks for cracks, threaded holes, crank straightness and size and all other critical areas addressed. All critical dimensions including bearing clearances, piston-to-wall clearance, piston protrusion, deck and hone...

FEATURES LONG BLOCK Comprehensive Inspection: Disassembled, crack-checked, blasted, and cleaned before machining. Precision Machining: CNC bored, line bored, surfaced as needed, and torque plate honed to exact specifications. Custom ARP Head Studs: 9/16" head studs provide the best head-to-block seal possible. D&J ARP 9/16"...

FEATURES LONG BLOCK Comprehensive Inspection: Disassembled, crack-checked, blasted, and cleaned before machining. Precision Machining: CNC bored, line bored, surfaced as needed, and torque plate honed to exact specifications. Custom ARP Head Studs: 9/16" head studs provide the best head-to-block seal possible. D&J ARP 9/16"...

The Ready Run Precision Plus Engine Package RAM 2500/3500 6.7L Cummins 2013- ‘18
 Reman Engine is designed to provide reliable and efficient performance for your diesel engine needs. This engine starts with the Precision Plus Reman Long Block and adds a host of BD...

Waterman Direct Drive Setup   No need to buy a whole new system when you can just buy the kit! Our Billet Direct Drive setup eliminates the complication of two electric lift pumps. It is capable of 300 GPH and engine dyno-proven to support...

Stage 2 VP44 Cummins Performance Head   Our Stage 2 VP44 Cummins Performance Head is designed for the performance enthusiast. It includes everything in our Stage 1 Cummins Performance Head plus a D&J Stage 2 VP44 Billet Intake Manifold, thread-in soft plugs in the...

Made from aircraft-quality 6061-T6 aluminum for exceptional durability and strength Comes with all stainless steel fasteners to ensure longevity and resistance to corrosion Retains factory CCV system, no catch can or other components required Includes D&J Powder Coated oil cap cover ABOUT THIS PRODUCT...

FEATURES Precision Machined & Fully Remanufactured – CNC blue printed, bored, honed and surfaced. Comprehensive inspection checks for cracks, threaded holes, crank straightness and size and all other critical areas addressed. All critical dimensions including bearing clearances, piston-to-wall clearance, piston protrusion, deck and hone...

  RAM 3500 4500 5500 Cab & Chassis 6.7L Cummins (2013–2018) – Remanufactured The Ready Run Precision Plus Cab & Chassis Engine Package is a fully assembled, drop-in remanufactured solution built specifically for RAM 3500 Cab & Chassis applications while retaining the same proven...