Product Description
Drop-in reliability for your 2003–2004 5.9L Cummins. The INDUSTRIAL INJECTION Premium Stock Plus Long Block is blueprinted for longevity and built with premium components including coated/chamfered pistons, ARP fasteners where critical, and a fully reconditioned cylinder head with fire-ring grooves and ARP 2000 head studs. Ideal for stock or mild-tow builds that demand OE manners with upgraded durability.
Fitment
- 2003–2004 Dodge Ram 2500/3500 with 5.9L 24-Valve Cummins (Common Rail)
- Direct long-block replacement for OEM 5.9L CR engines (2003–2004)
What’s Included
- Complete long block assembly (assembled short block + complete cylinder head)
- Balanced & blueprinted rotating assembly
- Coated & chamfered pistons, stock Cummins crank w/ ARP main studs, stock rods w/ ARP rod bolts, stock camshaft
- New Cummins tappets
- New oil pump, new water pump, new oil cooler, new oil pickup tube
- “Big Iron” oil pan
- Reconditioned cylinder head w/ diamond-honed guides, stainless valves, fire-ring grooves, ARP 2000 head studs, new stock valve springs
Specs & Build Details
- Sim-tested short block and precision blueprinting for clearances
- Fire-ring head gasket included on the assembled long block
- Core charge applies; see Helpful Notes
Recommended Parts (CPP Internal Links)
- ARP 247-4202 Head Stud Kit — 5.9L Cummins 24V
- MAHLE HS54556 Upper Head Set — 2003–2007 5.9L
- CP3 Injection Pumps — Stock & Performance (03–07)
- 03–07 Engine Parts — Gaskets, Pumps, Valve Train
- Cooling System — Water Pumps, Thermostats, Bypass
- See More 5.9L Long Blocks (2003–2007)
Cross-Reference / Alternatives
- CPP Diesel 5.9L CR Premium Long Block (03–07)
- Industrial Injection Performance Long Block — 03–07 5.9L
Helpful Notes
- Core Charge: $3,200 (billed in addition to product price; refundable per inspection when a like core is returned)
- Break-in Oil: Run Joe Gibbs/Driven break-in oil for the first 300–500 miles, then change oil & filter
- Does not include: valve cover, rockers, pushrods, or extra gaskets for final assembly
- Professional installation recommended; verify injector spray angle, gasket thickness, and tune are appropriate for a fire-ringed head
FAQ
Is this a direct replacement for my 2003–2004 5.9L?Yes. It’s built as a complete long block for 2003–2004 5.9L Common Rail trucks. Accessories, manifolds, and fuel system components transfer from your core.
What’s the difference between Stock, Stock Plus, and Performance?Stock is OE-style. Premium Stock Plus adds blueprinting, upgraded fasteners, coated pistons, and a reconditioned head with fire-ring grooves. Performance variants add further airflow and strength upgrades for higher HP goals.
Do I still need ARP head studs if they’re included?This long block is assembled with ARP 2000 head studs. If you’re re-torquing or changing gasket thickness, consult our engine parts section for replacement hardware and proper torque specs.
What else should I replace while the engine is out?Common add-ons include a fresh CP3 pump, full upper head set, and cooling refresh from our cooling system category.
