D&J - Heavy Hauler Long Block - 2004.5 - 2007 Dodge 5.9L Cummins - DJPLB100015

Part # DJPLB100015

The Heavy Hauler 5.9 Cummins Common Rail Long Block is built for towing, heavy-duty work, and high-performance applications, delivering up to 700 HP while improving airflow, fuel efficiency, and durability. This long block includes a D&J Stage 1 High-Performance Cylinder Head, a street/towing camshaft for lower EGTs, and custom ARP 9/16” head studs for maximum sealing strength. Fully blueprinted, CNC-machined, and pre-lubed with break-in oil, this long block is engineered for superior reliability and performance. Manufactured by D&J Precision Machine, this engine is designed to handle extreme workloads with ease.

Key Features:

• 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.
• High-Performance Cylinder Head: D&J Stage 1 Performance Cylinder Heads are disassembled, crack-checked, fitted with extra-large heavy-duty seats, machined for thread-in soft plugs, and 5-axis CNC ported. Each head undergoes a CNC high-performance valve job and is pressure-checked before assembly and painting.
• Blueprinted and Balanced: All engines are blueprinted, balanced, oil clearance measured, and rings file fit.
• Pre-lubed and Painted: Engines are painted black and shipped pre-lubed with break-in oil and filter included.
• Machined Rocker Box and Pedestals: Ensures a precise fit and optimal performance.
• Rated for up to 700 HP - Designed for demanding work applications, though high-horsepower tuning is not recommended for heavy towing
• Street/Towing Performance Camshaft - Lowers EGTs by 200-300 degrees, improving efficiency and fuel economy

Quality Control

• Multiple Inspections: Each part is inspected multiple times by different team members to ensure the best quality control.

Build Includes:

• New Pistons
• 12mm ARP main studs
• D&J ARP 9/16" Head Studs torqued to 175 ft/lbs
• D&J HD 7/16" Pushrods
• D&J 200 CFM Stage 1 High-Performance Cylinder Head
• D&J tow performance cast cam
• New Tappets
• New Oil Cooler
• New Oil Pump
• New Crankshaft Seals
• Billet soft plugs (front, rear, and side)
• Reconditioned stock connecting rods
• Front cover installed
• Machined rocker box
• Machined rocker pedestals
• Pre-lubed with break-in oil and filter included
• Pressure-checked cooling system and crankcase to ensure no leaks on installation

High-Performance Cylinder Head Includes:

• All new HD bronze valve guides installed
• Heavy-duty extra-large intake and exhaust seats installed
• Industry-leading 5-axis CNC port job
• Thread-in soft plugs under the valve cover
• High-performance CNC valve job performed
• New valve seals and soft plugs installed
• New 105# springs installed

Core Returns

Cores must include usable block, crank, cylinder head, rocker bases, oil pan and bolts, pickup tube, timing gear housing, timing gear housing cover and bolts, rear seal housing and bolts, piston cooling nozzles, lower rocker box, and bolts. Freight charge for core return will be deducted from the core charge.

D&J PRECISION MACHINE

Located in the heart of Ohio, D&J Precision Machine emerged from humble beginnings, where Founder Drew Pumphrey’s passion for diesel performance led to a revolution in the diesel engine industry. With a modest investment, Drew’s drive turned D&J into a diesel powerhouse, pushing boundaries in Zanesville and Cambridge, Ohio.

As a proud member of the Burnout Brands group of companies, D&J Precision Machine stands with BD and Monster Transmission as a beacon of excellence in the automotive aftermarket sector.

You can tell if you have a Early 2004 or Late 2004.5 Cummins by checking the engine's horsepower rating, which is printed on the valve cover sticker; 305hp indicates an early 2004, while 325hp indicates a 2004.5. Alternatively, check the turbo's wastegate (electronic for 2004.5, mechanical for early 2004) or the location of the throttle position sensor (at the pedal for 2004.5, near the intake horn for early 2004).