Product Description
Restore tight compression and factory reliability with INDUSTRIAL INJECTION PDM-3673.040 stock pistons for the 2004.5–2007 5.9L Cummins. This .040” oversize set is an OE-style, drop-in replacement and arrives complete with rings, wrist pins, and clips for a clean, professional rebuild.
Fitment
- 2004.5–2007 Dodge Ram 2500 / 3500 5.9L Cummins (24-Valve Common Rail)
What’s Included
- (6) Stock-type cast pistons — .040” oversize
- Matched piston rings, wrist pins, and clips
Why These Pistons
- OE-style design for smooth, quiet operation and long service life
- Drop-in kit with rings/pins/clips to simplify assembly
- .040” overbore to clean up worn/scored cylinders during machining
Recommended Parts (CPP Internal Links)
- ARP 247-4202 Head Stud Kit (1998.5–2024 5.9L/6.7L)
- MAHLE HS54557 Head Gasket Set (03–07 5.9L)
- MAHLE 54557A MLS Head Gasket (Std Bore, 1.28 mm)
- MAHLE CS54556 Lower Gasket Set (03–07 5.9L)
- 03–07 5.9L Cummins — Engine Parts
- Cummins Pistons & Rings (24V)
Helpful Notes
- Machine work required: .040" overbore and cylinder finish must match ring supplier specs; check piston-to-wall clearance and ring end gaps.
- Verify piston protrusion and select the correct MLS head gasket thickness during assembly.
FAQ
Do these include rings and pins?Yes. This PDM-3673.040 set ships with matched rings, wrist pins, and clips for all six cylinders.
Are these forged or cast?They are OE-style cast pistons designed for stock rebuilds and daily-driven reliability.
Will they work with my 2004 (early) truck?These fit 2004.5–2007 common-rail 5.9L engines. Early-2004 (’03–early ’04) applications use different pistons.
What else should I replace during the job?We strongly recommend new head studs, a full upper/lower gasket set, and to measure for the correct MLS head gasket thickness.
