MAHLE 41909 PISTON RING SET (STD) FOR 01–10 GM DURAMAX 6.6L

Product Description

Restore compression and oil control on your LB7/LLY/LBZ/LMM with the MAHLE 41909 Piston Ring Set (Standard Bore) for the 2001–2010 GM 6.6L Duramax. This complete 8-cylinder ring kit uses OE-grade materials and profiles—plasma-moly ductile-iron top ring, cast-iron second, and a gas-nitrided 3-piece oil ring—to seat quickly and seal reliably for long service life.

Mahle 41909 piston ring set standard, Duramax 6.6L LB7 LLY LBZ LMM rings, 2001-2010 GM 6.6 diesel ring kit, plasma moly top ring, Mahle OE piston rings, complete engine set, CPP Diesel

Fitment

• 2001–2004 LB7, 2004.5–2005 LLY, 2006–2007 LBZ, 2007.5–2010 LMM
• Vehicles: Silverado/Sierra 2500HD & 3500HD; Express/Savana 2500/3500 (select years); Kodiak/TopKick C4500–C5500 (select years)

Cross-Reference / Alternatives (Mahle only)

• Mahle S41909 Piston Ring Set (Std, per-cylinder): S41909
• Mahle 41909.01 Piston Ring Set (.010): 41909.01
• Mahle 41909.02 Piston Ring Set (.020): 41909.02
• Mahle 41909.03 Piston Ring Set (.030): 41909.03
• Mahle 41909.04 Piston Ring Set (.040): 41909.04
• For 2011–2016 LML/LGH, see Mahle 42160 ring sets (Std & oversizes): 42160 (Std), 42160.01, 42160.02, 42160.03

What’s Included

• Complete engine set: rings for all 8 pistons (file-fit to your build as required)
• Top, second, and oil control rings in standard bore (~4.055")

FAQ

Will these rings fit all 2001–2010 Duramax engines?
Yes—this standard-bore set covers LB7, LLY, LBZ, and LMM. Always verify your finished bore and service size before ordering.

Are the rings pre-lapped for quick seating?
Yes—Mahle supplies these with pre-lapped faces to help them seat quickly with the correct hone finish.

What are the ring materials and widths?
Top: ductile iron with plasma-moly face (≈3.0 mm); second: cast iron (≈2.0 mm); oil: 3-piece gas-nitrided assembly (≈3.0 mm).

Is shipping included?
We list this item with Free Shipping in the contiguous U.S.

Specifications for Mahle 41909