Product Description
MAHLE 42160.03 is a complete .030" over piston ring set engineered for the 2011–2016 GM 6.6L Duramax LML/LGH. Pre-lapped rings seat quickly and are built to OE standards for durability and low oil consumption.
- Engine: 6.6L Duramax LML/LGH (2011–2016)
- Oversize: .030" over (approx. 0.75 mm)
- Bore Size: ~4.085" (103.6 mm)
- Construction: Top ring stainless/gas-nitrided; second ring cast/chrome-faced; oil control ring steel
Fitment
- 2011–2016 Chevrolet Silverado 2500HD/3500HD (6.6L Duramax LML/LGH)
- 2011–2016 GMC Sierra 2500HD/3500HD (6.6L Duramax LML/LGH)
What’s Included
- Complete set of piston rings for all 8 cylinders (.030" over) — pre-lapped for quick seating
Cross Reference / Alternates
- MAHLE 42160 (STD)
- MAHLE 42160.01 (.010")
- MAHLE 42160.02 (.020")
- MAHLE 42160.04 (.040")
FAQ
Will these rings fit my 2011–2016 LML/LGH Duramax?
Yes—this set is designed for 6.6L LML/LGH engines and specifically for blocks bored .030" oversize.
Do I need to measure the bores first?
Yes—verify bore diameter and piston-to-wall clearance. These are .030" over rings and require properly machined cylinders.
Are the rings pre-lapped?
Yes—pre-lapped to help them seat quickly after installation.
What ring materials are used?
Top ring stainless/gas-nitrided, second ring cast/chrome-faced, oil control ring steel—optimized for durability and sealing.
Break-in tips?
Use conventional oil for initial break-in and vary load/RPM; follow your engine builder’s procedure.
