Product Description
Industrial Injection PDM-298.040 GM Duramax Race Cast Pistons - .040 Over
Build your 6.6L Duramax to live at high heat and high boost. These Industrial Injection race cast pistons feature a de-lipped bowl for improved strength, fly-cut valve reliefs for aftermarket cams, and dual coatings: a thermal barrier crown and a ceramic skirt coating to reduce friction and heat soak.
Key Features
- .040" oversize bore for performance rebuilds
- De-lipped combustion bowl to reduce cracking in extreme duty use
- Precision fly-cut valve reliefs (check piston-to-valve with your cam & gasket stack)
- Thermal barrier crown coating & ceramic skirt coating
- Designed for high-boost, competition-oriented Duramax builds
What's Included
- (1) Set of pistons for GM 6.6L Duramax V8 (quantity to complete one engine)
- Wrist pins & clips
Note: Piston rings are not included unless specified by the manufacturer. Add rings from our Duramax pistons & rings section below.
Fitment
GM/Chevy & GMC 2500/3500 HD trucks equipped with 6.6L Duramax, 2001-2016:
- LB7 (2001-2004)
- LLY (2004.5-2005)
- LBZ (2006-2007)
- LMM (2007.5-2010)
- LML (2011-2016)
Specifications
| Manufacturer | Industrial Injection |
| Part Number (MPN) | PDM-298.040 |
| Bore Size | .040" oversize |
| Construction | Race cast aluminum, de-lipped bowl |
| Coatings | Thermal barrier crown, ceramic skirt |
| UPC | 840256914184 |
| GTIN-14 | 00840256914184 |
| CARB EO | None (for off-road/competition use where applicable) |
| Prop 65 | YES - Cancer & Reproductive Harm: www.P65Warnings.ca.gov |
Recommended Parts & Related Categories
- ARP 230-4201 Head Stud Kit - 2001-2016 Duramax
- Duramax Head Gaskets & Engine Gasket Sets
- Duramax Pistons & Ring Sets
- S&S Diesel LML CP3 Conversion Kit (2011-2016)
- CP-Carrillo Pistons & Connecting Rods
Helpful Notes
- Machine shop must finish-hone to the piston manufacturer's recommended piston-to-wall clearance.
- Always mock-up and verify piston-to-valve clearance with your specific camshaft and head gasket thickness.
- De-lipped bowl designs are intended for high-heat, high-boost use; tune and fuel accordingly.
FAQ
Do these pistons fit all 2001-2016 Duramax engines?Yes. They are designed for LB7, LLY, LBZ, LMM, and LML 6.6L engines. Bore is .040" oversize-your block must be machined accordingly.
Are piston rings included?Rings are typically sold separately. Add rings from our Duramax pistons & rings section.
Are they compatible with high-lift cams?These are fly-cut race pistons, but you must verify piston-to-valve clearance for your cam profile and gasket stack during mock-up.
What coatings are applied and why?Thermal barrier on the crown helps manage heat; ceramic skirt coating reduces friction and scuffing under high load.
Are these legal for street use in California?No CARB Executive Order is provided. Intended for off-road/competition use where applicable. See Prop 65 notice above.
