Product Description
Restore factory reliability and compression with INDUSTRIAL INJECTION PDM-3672 stock replacement pistons for the 2003–2004 5.9L Cummins common-rail. Built to OE-spec geometry and materials, these pistons are a smart choice for daily drivers and tow rigs that need dependable, long-service rebuild parts without changing power goals.
Fitment
- 2003–2004 Dodge Ram 2500/3500 with 5.9L Cummins 24-Valve Common Rail (ISB)
- Stock replacement for OE-equivalent pistons; maintains factory compression ratio
What’s Included
- (6) Stock-style pistons for 5.9L Cummins
- Wrist pins and retaining clips
- Piston rings (application dependent)
Key Features
- OE-spec bowl design for clean combustion and cold-start manners
- Stock compression – preserves factory drivability and towing performance
- Drop-in compatibility with OEM rods and factory-length pins
- Available in standard and common oversizes to match your machine work
Recommended Parts (CPP Internal)
- Head gasket set for 2003–2004 5.9L Cummins
- Head stud kit (for improved clamping on towing/working trucks)
- Oil pump and pickup tube (refresh while you’re in there)
- Upper and lower gasket kits, front/rear main seals
- Piston cooling nozzles/jets if your originals are worn or clogged
Helpful Notes
- Machine work required: Always measure the block and match piston size (standard or oversize). Verify piston-to-wall clearance and ring end gaps per spec.
- Injector health matters: Leaking injectors can wash cylinders and damage new pistons—test or refresh injectors during the rebuild.
Cross-Reference / Alternatives
- Stock-equivalent 5.9L Cummins pistons for 2003–2004 common-rail applications
- Performance (de-lipped or coated) pistons are available separately if future power goals change
FAQ
Will these change my compression or drivability?No—PDM-3672 is intended as a stock replacement, maintaining factory compression and drivability for 2003–2004 5.9L Cummins.
Do I need machine work?Yes. Even for standard size, a competent machine shop should measure, hone/boring as needed, and set ring end gaps to spec.
Are rings included?Sets typically include rings, pins, and clips. Always verify your selected option and contents before checkout.
Can I tow heavy with these?Yes. These are OE-style pistons designed for stock power levels—ideal for work and towing when paired with healthy injectors and cooling.
