Product Description
MAHLE 224-3985WR-0.25MM reduced-compression piston with rings for the 2011–2016 GM 6.6L Duramax LML/LGH. Oversize +0.25 mm (.010") bore for precise rebuilds. MAHLE’s coated skirts reduce friction and scuffing for long service life in tuned and towing applications.
- Reduced-compression design for performance/tuning headroom
- OE-grade alloy and machining, skirt coating for durability
- Includes piston rings matched to each piston
- Oversize: +0.25 mm (.010")
- UPC/GTIN: 639789251039
Pricing clarity: At CPP Diesel, the price listed is for a complete set of eight (8) pistons.
Fitment
- 2011–2016 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD
- 6.6L Duramax LML & LGH engines
Cross Reference & Alternatives
- MAHLE standard & other oversizes: 224-3985WR (STD), 224-3985WR-0.50MM, 224-3985WR-0.75MM
- Related MAHLE LML/LGH piston families may appear as 224-3935WR series on some catalogs (verify compression & bowl).
What’s Included
- Eight (8) MAHLE 224-3985WR-0.25MM pistons
- Matched piston ring sets (installed or boxed per MAHLE packaging)
Helpful Notes
- Measure cylinders and hone to final size/finish per MAHLE spec for coated skirts and modern ring packs.
- Verify compression ratio impact vs. stock if stacking with heads, gasket thickness, or large injectors/turbo.
FAQ
Is the price on this page for a full set?
Yes—our CPP Diesel price is for a complete set of eight pistons with rings.
What engines does this fit?
2011–2016 6.6L Duramax LML/LGH in Silverado/Sierra 2500HD/3500HD.
What oversize is this?
+0.25 mm (.010"). Other oversizes and the standard bore version are available—see Cross Reference.
Are wrist pins and locks included?
MAHLE piston assemblies include rings; pins/locks follow MAHLE’s packaging for this SKU. Check your build sheet or add pins/locks if required.
Do I need machine work?
Yes—final hone to spec and check piston-to-wall, ring gaps, and surface finish. Always follow MAHLE installation guidelines.
