Product Description
Marine big-bowl airflow with performance durability. INDUSTRIAL INJECTION PDM-03523CC.040 pistons are the coated & chamfered (.040" over) version for the 1989–1998 5.9L Cummins 12-valve. The larger “marine” bowl improves air/fuel mixing, while the CC spec adds skirt/crown protection and top-edge chamfering to reduce scuffing under heat and load. Complete set with rings, wrist pins, and clips.
Fitment
- 1989–1998 Dodge Ram 5.9L Cummins 12-Valve (6BT) — all VIN/years in this range
- Bore size: .040" over (≈4.056") — requires machine hone/bore
What’s Included
- (6) Coated & chamfered “Marine Big Bowl” pistons — .040” oversize
- Matched rings, wrist pins, and clips
Key Features
- Marine big-bowl design for improved mixture and clean burn under load
- CC spec (Coated & Chamfered) to help manage heat and reduce skirt scuffing
- Drop-in component set (after machine overbore), OE pin height and compression ratio
- Built for towing, work, and performance street/marine applications
Recommended Parts (CPP internal links)
- ARP 247-4203 Head Stud Kit — 1989–1998 5.9L 12V
- MAHLE HS4068 Upper Head Set — 1989–1998 12V
- MAHLE 4068C Head Gasket (STD .061") — 1989–1998 12V
- Total Seal S4194-40 Gapless 2nd Ring Set — 4.056" (.040 over)
- CPP Fly-Cut Pistons Service — extra valve clearance for big cams
- Shop All 12V Cummins Pistons & Rings
Cross-Reference / Alternatives
- PDM-03523.040 — Marine Big Bowl (Stock style) .040 over
- PDM-03523CC.020 — Marine Big Bowl Performance .020 over
- PDM-03523CC — Marine Big Bowl Performance (Stock bore)
Helpful Notes
- Machine work required: .040" overbore and proper piston-to-wall clearance and ring end gaps.
- Confirm bowl/CR compatibility with your injector spray pattern, head gasket thickness, and intended boost/fuel.
FAQ
What does “CC” mean on this part number?“CC” indicates the Coated & Chamfered version. These receive skirt/crown coatings and a top-edge chamfer to help reduce scuffing and heat stress in hard-use builds.
Are these truly drop-in?The set includes rings, pins, and clips, but a .040" overbore/hone and precise measurements are required for correct clearances.
Why the Marine Big Bowl?The larger bowl improves air/fuel mixing and can support cleaner combustion and EGT control under load compared to small-bowl designs.
Which supporting mods are recommended?Head studs, fresh head gasket(s), quality ring sets, adequate fuel supply and cooling. Consider fly-cutting for high-lift cams.
