Product Description
Turn up your 12-valve. INDUSTRIAL INJECTION PDM-03513FCC.020 forged MAHLE race pistons are built for hard-use 5.9L Cummins builds (1989–1998). This .020" oversize set comes coated and ready with rings, wrist pins, and clips. Ceramic skirt coating reduces friction/scuffing, while a thermal-barrier crown helps keep heat in the chamber for stronger, cleaner burn under big boost and fuel.
Fitment
- 1989–1993 RAM 2500/3500 5.9L Cummins 12-Valve (6BT, VE-pump)
- 1994–1998 RAM 2500/3500 5.9L Cummins 12-Valve (P7100/P-pump)
What’s Included
- (6) Forged MAHLE pistons — .020" oversize
- Matched piston rings, wrist pins, and clips
- Performance coatings: thermal-barrier crown & ceramic skirt
Key Features
- Race-ready forged pistons for high heat/pressure builds
- Ceramic skirt coating to reduce friction and scuffing
- Thermal-barrier crown to retain heat in the chamber and improve efficiency
- Fly-cut (valve relief) & chamfered crown spec for high-lift cam clearance and cylinder wall protection
- Direct replacement with required .020" overbore
Recommended Parts (CPP Internal Links)
- ARP 247-4203 Head Stud Kit (1989–1998 5.9L 12V)
- MAHLE HS4068 Upper Head Gasket Set (STD) — 1989–1998
- Shop All Cummins 12V Pistons & Rings
Helpful Notes
- Professional machine work required for .020" overbore. Verify piston-to-wall clearance and ring end gaps.
- Confirm valve relief & gasket thickness vs. camshaft specs and target compression ratio.
Cross-Reference / Alternatives
- INDUSTRIAL INJECTION PDM-03513FCC.040 — .040 OVER (Race)
- INDUSTRIAL INJECTION PDM-03513CC.020 — .020 OVER (Performance)
- INDUSTRIAL INJECTION PDM-03523FCC.020 — Marine Big Bowl (Race, .020)
FAQ
Are these truly “drop-in” pistons?The set includes rings, pins, and clips, but you must machine the block for .020" over and set clearances to spec.
What do the coatings do?The ceramic skirt coating reduces friction and scuffing under high load; the thermal-barrier crown helps contain heat in the chamber for better efficiency and durability under boost.
Do I need valve reliefs for a stock cam?Most stock-cam builds do not require additional relief beyond the supplied fly-cut spec. High-lift cams or tight piston-to-valve setups may need extra clearance—measure during mock-up.
What supporting mods are recommended?Head studs, correct head gasket set, adequate fuel supply, and precise tuning. For heavy towing or competition, consider upgraded rods and balanced rotating assembly.
