Product Description
Stronger, cooler, and built for boost. INDUSTRIAL INJECTION’s PDM-3672CC Coated & Chamfered piston set is purpose-built for the 2003–2004 5.9L Cummins common-rail. Each piston is .010" deck-relieved and bowl-chamfered, then finished with a thermal-barrier crown and low-friction skirt coating to survive heat and cylinder pressure from bigger fuel and air. Drop-in set complete with rings, pins, and clips.
Fitment
- 2003–2004 Ram 2500/3500 with 5.9L Cummins (common-rail 24V)
What’s Included
- (6) Coated & Chamfered pistons (standard bore)
- Matched piston ring set
- Wrist pins and pin clips
Key Features
- Coated & Chamfered: .010" off the top plus bowl chamfer to manage heat and reduce scuffing
- Thermal-barrier crown helps keep heat in the chamber for efficiency and detonation resistance
- Ceramic-type skirt coating reduces friction and skirt wear under high load
- Complete drop-in kit with rings, pins, and clips
- Available sizes: STD, .020, .040
Recommended Parts (CPP internal links)
- ARP 247-4202 Head Stud Kit (1998.5–2024 Cummins 5.9/6.7)
- MAHLE HS54556 Head Gasket Set (2003–2007 5.9L)
- PDM-3672CC.020 — .020 Over (03–04 Cummins)
- Shop all Cummins Pistons & Rings
Helpful Notes
- Have a machine shop verify piston-to-wall clearance and set ring end-gaps for your power level and fuel type.
- For very high-lift cams, a fly-cut version (with ~.100" valve reliefs) may be preferable; verify cam/clearances.
FAQ
What does “Coated & Chamfered” mean?These pistons have .010" removed from the crown and a bowl chamfer to reduce hot-spots, plus a thermal crown coating and a skirt coating for durability under heat and load.
Are these a direct replacement?Yes—this is a complete drop-in kit for 2003–2004 5.9L common-rail engines. Always measure and hone/finish cylinders to spec for the chosen bore size.
What bore sizes are available?Standard, .020, and .040 over are available. Choose the size that matches your machining plan.
What supporting mods do you recommend?Head studs, fresh MLS head gasket set, clean injector spray patterns, and adequate fuel/air supply. Tune conservatively during break-in.
