Product Description
Restore factory reliability and sealing in your 2003-2004 5.9L Cummins with INDUSTRIAL INJECTION's stock replacement piston set in .020" oversize. This is a complete kit with pistons, rings, wrist pins, and clips-ideal for freshen-ups and full rebuilds on early common-rail ISB engines.
Fitment
- 2003-2004 Dodge Ram 2500/3500 with 5.9L Cummins 24-valve (Common Rail)
- Bore size: .020" over (machine work required)
- Sold as a set of 6
What's Included
- (6) Stock replacement pistons - .020" oversize
- Matched piston ring set
- Wrist pins and retaining clips
Why This Kit
- OE-style design for stock drivability and durability
- Complete package cuts parts hunting-drop into a properly machined block
- Proven fitment for 2003-2004 ISB 5.9L (24V common rail)
Recommended Parts (CPP Internal Links Only)
- ARP 247-4202 Head Stud Kit - 5.9L/6.7L Cummins
- MAHLE HS54557 Cylinder Head Gasket Set - 03-07 5.9L Cummins
- Cummins 3958645 OEM MLS Head Gasket (Thick) - 03-07 5.9L
- Shop All Cummins Pistons & Rings
- 03-07 Cummins Engine Parts (Gaskets, Bearings, Valvetrain & more)
Helpful Notes
- Machine work required: Block must be bored/honed to .020" over; verify piston-to-wall and ring end gaps.
- Confirm piston bowl/combustion design matches your model year injectors and cylinder head.
- Always measure and set piston protrusion and choose the correct MLS head gasket thickness.
FAQ
Is this a direct stock replacement?Yes. This is an OE-style piston set sized .020" over for 2003-2004 5.9L common-rail Cummins. Professional machining to .020" over is required.
What exactly is included?Six pistons, matched rings, wrist pins, and retaining clips-everything you need for the piston portion of your short block refresh.
Do these come coated?The stock kit is an OE-style replacement. If you need coated or performance pistons, see our performance and race variants for 03-04.
What else should I replace during a rebuild?We recommend new head fasteners (studs/bolts), an MLS head gasket or full top-end set, bearings, oil pump, and a thorough injector/nozzle inspection.
| Specification | Value |
|---|---|
| Part Number | PDM-3672.020 |
| Product Name | INDUSTRIAL INJECTION DODGE CUMMINS STOCK PISTONS - 2003-2004 5.9L 24V (COMMON RAIL) - .020 OVER |
| Fitment | 2003-2004 Dodge Ram 2500/3500, 5.9L Cummins 24-Valve (Common Rail) |
| UPC (UPC-A) | 840256914368 |
| GTIN | GTIN-12 (same as UPC-A): 840256914368 |
| Quantity | Set of 6 pistons with rings, wrist pins, and clips |
| Oversize | .020" (0.50mm) over |
| Material/Type | OEM-style stock replacement piston kit |
| Prop 65 | ⚠️ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
