Product Description
MAHLE CS54580 is the OE-quality lower engine (conversion) gasket set for the 2001–2007 GM 6.6L Duramax (LB7/LLY/LBZ). It includes the critical lower-end gaskets and seals needed for reseals and bottom-end service. Head gaskets/bolts not included.
Key Features & Specs
- Includes: Water pump gasket, timing cover gaskets/seal, rear main seal, oil pan (side-rail) gasket
- Excludes: Cylinder head gaskets, head fasteners
- Package quantity: ~19 pieces; Item grade: OEM Standard; Oil pan gasket material: RTV
- Rear main seal: Included (rubber); Water outlet gasket: Not included
- GTIN/UPC: 027067724236
- Warranty: 1-Year Limited (Prop 65 compliant)
Fitment
- 2001–2007 GM 6.6L Duramax LB7 / LLY / LBZ (Chevy/GMC Silverado 2500HD & 3500HD)
- Also used in: 2003–2007 Chevy C4500/C5500 Kodiak; 2006–2007 Chevy/GMC Express 2500/3500 vans
Cross Reference / Related MAHLE Items
- Pairs with MAHLE Head Set: HS54580 (2001–2004 LB7) and HS54580A (2004.5–2007 LLY/LBZ) for a complete top+bottom kit
- Related complete gasket kits (without head gasket): 95-3726VR (2001–2004) and 95-3727 (2004.5–2007)
FAQ
Will this fit my 2001–2007 Duramax?
Yes—this CS54580 lower set fits LB7, LLY, and LBZ 6.6L Duramax engines from 2001–2007.
Does this include the rear main seal?
Yes—the rear main seal is included. It also includes timing cover gaskets/seal and a water pump gasket.
Are head gaskets or head bolts included?
No—this is a lower engine (conversion) set. Add MAHLE HS54580/HS54580A head sets and your preferred head fasteners separately.
What material is the oil pan gasket?
RTV-style sealing for the oil pan (side-rail) per MAHLE’s spec.
How many pieces are in the kit?
Approximately 19 pieces (various lower-end gaskets and seals).
