Product Description
Build a stout, reliable 6.6L Duramax short block with INDUSTRIAL INJECTION Race cast pistons (.020" oversize). These de-lipped pistons feature cut, coated crowns and a ceramic skirt coating engineered for high heat and load—ideal for tuned, towing, and competition builds.
Fitment
- 2001–2004 LB7 6.6L Duramax
- 2004.5–2005 LLY 6.6L Duramax
- 2006–2007.5 LBZ 6.6L Duramax
- 2007.5–2010 LMM 6.6L Duramax
- 2011–2016 LML 6.6L Duramax
What’s Included
- (8) Race cast pistons — .020" oversize
- (8) Matched piston rings
- (8) Wrist pins & clips
Key Features
- De-lipped bowl for added strength under cylinder pressure
- Cut & coated tops to manage combustion heat
- Ceramic skirt coating reduces friction/scuffing; engineered to handle extreme load and temperature environments
- .020” oversize for refresh/rebuilds requiring a light overbore
- Drop-in component set with rings, pins, and clips (machine work required for overbore)
Recommended Parts (Internal CPP Links)
- ARP 230-4201 Head Stud Kit (2001–2016 Duramax)
- MAHLE HS54580 Head Set (LB7 2001–2004)
- MAHLE HS54580A Head Set (LLY/LBZ 2004.5–2007)
- MAHLE HS54580C Upper Head Set (LML 2011–2016)
- S&S Diesel LML CP3 Conversion Kit — No Tuning Required (2011–2016)
- Shop All Duramax Pistons & Rings
Helpful Notes
- Machine work required: Bore/hone to .020" over and verify piston-to-wall and ring end-gaps to your build spec.
- Choose head gasket thickness/grade to achieve your target compression ratio and piston-to-head clearance.
- On 2011–2016 LML trucks pushing power, a CP3 conversion is a proven reliability upgrade for fueling.
FAQ
Are these pistons forged?No—this listing is for race cast pistons with de-lipped bowls and coated crowns/skirts. If you need forged pistons, see our forged options.
Do these include valve reliefs?This cast set is supplied without additional fly-cut valve reliefs. Confirm piston-to-valve clearance with your camshaft and gasket thickness.
What temperatures/loads can the skirt coating handle?The ceramic skirt coating is designed for extreme duty, with published data indicating load capacity in the hundreds of thousands of PSI and lubricity at very high temperatures. Ideal for high-heat, high-load diesel use.
What supporting mods are recommended?Head studs, correct head set, quality lift pump and filtration, and (for LML) a CP3 conversion when significantly increasing fueling.
