Product Description
Turn your 12-valve into a hard-charging, cool-running workhorse. INDUSTRIAL INJECTION’s PDM-03523FCC.020 Marine “Big Bowl” Race Pistons (.020” over) are engineered for towing, sled-pull, and street/strip 5.9L Cummins builds that demand strong combustion control and durability. The enlarged marine-style re-entrant bowl helps manage heat and air/fuel mixing under big boost and aggressive fueling.
Fitment
- 1989–1993 Dodge Ram 2500/3500 — 5.9L Cummins 12-Valve (VE pump)
- 1994–1998 Dodge Ram 2500/3500 — 5.9L Cummins 12-Valve (P7100 “P-pump”)
- .020” oversize — machine hone/bore required
What’s Included
- (6) Marine Big-Bowl race pistons — .020” over
- Wrist pins and locks
- Piston ring set matched for .020” over
Why These Pistons
- Marine “Big Bowl” design for improved combustion control under high boost
- Race-ready construction intended for elevated cylinder pressure and EGT
- .020” overbore to refresh worn cylinders and tighten clearances
- Drop-in compression ratio for common performance combos
Recommended Parts (CPP Internal Links Only)
- Shop 1989–1993 5.9L Cummins (VE)
- Shop 1994–1998 5.9L Cummins (P7100)
- Head studs, head gaskets, and injector upgrades (see Cummins 12V categories)
Helpful Notes
- Have your block measured by a machine shop; set piston-to-wall and ring end-gaps to your builder’s spec.
- Match bowl style and compression to your injector size, turbo(s), timing, and intended use.
FAQ
What makes the “Marine Big Bowl” different?The larger re-entrant bowl helps manage heat and air/fuel mixing at higher boost and fueling rates compared to a stock automotive bowl, supporting cleaner combustion under load.
Do I need machine work for .020” over?Yes. A professional bore/hone to .020” over is required. Always verify clearances and ring gaps during assembly.
Are coatings or fly-cuts included?These pistons are supplied in a race configuration for 12-valve builds. If your cam/valve setup requires valve relief or specific coatings, confirm those needs with your builder before ordering.
What supporting mods are recommended?Head studs, correct head gasket thickness, proper injector sizing, upgraded turbocharger(s), and adequate fuel supply are strongly recommended for high-output builds.
