Product Description
MAHLE 41909.01 complete piston ring set, .010" oversize, engineered for the 2001–2004 GM 6.6L Duramax LB7 (VIN “1”). OE-quality, pre-lapped rings seat quickly and restore compression after a .010" overbore service. Set covers all 8 cylinders.
- Application: 6.6L Duramax LB7 (VIN 1)
- Bore (service): 4.065" (103.25 mm)
- Ring widths: 3.0 mm / 2.0 mm / 3.0 mm
- Construction: Top ring ductile iron with plasma-moly face; second ring cast iron; oil ring assembly GNS
- Includes: Complete set of rings for V8 engine
- UPC/GTIN: 027067460790
Fitment
- 2001, 2002, 2003, 2004 Chevrolet Silverado 2500HD/3500 (6.6L Duramax LB7, VIN “1”)
- 2001, 2002, 2003, 2004 GMC Sierra 2500HD/3500 (6.6L Duramax LB7, VIN “1”)
Cross Reference Items
- Alternate MAHLE/MFR numbers: 41909010 (MPN variant), UPC 027067460790.
- Related MAHLE .010 pistons for LB7: 224-3451WR.010 (Left bank), 224-3452WR.010 (Right bank).
- Legacy/Michigan-77 reference: 41909.01.
What’s Included
One complete .010" oversize piston ring set for a single 6.6L Duramax V8 engine (all cylinders).
FAQ
Will these fit my LB7?
Yes. These rings are intended for 2001–2004 Duramax LB7 engines (VIN code “1”) that have been bored .010" over.
Are the rings pre-lapped / is there a long break-in?
They are pre-lapped to seat quickly, minimizing break-in time when the bores are finished correctly.
What bore size do I hone to?
Target a finished bore of approximately 4.065" for a .010" overbore (verify with your machinist and MAHLE spec).
What other parts should I pair with these?
Match to .010" oversize pistons (LB7 left 224-3451WR.010 / right 224-3452WR.010) and confirm correct hone finish (RA/Rz) for moly rings.
