MAHLE S41909 PISTON RING SET (STD) FOR 01-10 GM DURAMAX 6.6L

Product Description

Refresh ring seal on your LB7/LLY/LBZ/LMM with the MAHLE S41909 Standard Piston Ring Set for 2001–2010 GM 6.6L Duramax. This OE-grade set uses a plasma-moly ductile-iron top ring, precision cast-iron second, and a gas-nitrided 3-piece oil ring assembly for reliable compression, oil control, and durability on stock or tow-tuned builds. Pre-lapped for quick seating and consistent break-in.

Mahle S41909 piston ring set, Duramax 6.6L piston rings standard, LB7 LLY LBZ LMM rings, GM 6.6L ring set plasma moly, Mahle Original rings GTIN 027067555106 UPC 027067555106, CPP Diesel Duramax rebuild parts

Fitment

• 2001–2010 Chevrolet Silverado 2500HD/3500HD — 6.6L Duramax (LB7, LLY, LBZ, LMM)
• 2001–2010 GMC Sierra 2500HD/3500HD — 6.6L Duramax (LB7, LLY, LBZ, LMM)
• 2001–2010 Chevrolet Express / GMC Savana 2500/3500/4500 — 6.6L Duramax
• Also applicable to medium-duty Kodiak/TopKick where equipped

Cross-Reference / Alternatives (Mahle only)

• 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

What’s Included

• One (1) cylinder’s ring pack: top, second, and oil ring assembly (order 8 sets for a complete V8)

Why CPP Diesel

• Fast fulfillment and diesel-focused tech support
• Curated Mahle coverage for Duramax platforms

FAQ

Is this a full engine set?
No—this is a single-cylinder ring set. Order 8 for a complete engine.

Will S41909 fit LB7, LLY, LBZ, and LMM?
Yes—this standard-size set covers 2001–2010 6.6L Duramax (LB7–LMM). Verify bore and service size before ordering.

What materials/coatings are used?
Plasma-moly ductile-iron top, cast-iron second, and gas-nitrided 3-piece oil ring for long life and stable sealing.

Any install tips?
Measure each bore, confirm finish per Mahle/GM specs, check end gaps, and orient rings per instructions. Hone if out of spec and choose the proper oversize (.010/.020/.030/.040).

Specifications for Mahle S41909