Product Description
MAHLE 54583 is the LEFT (driver-side) Grade A 0.95 mm MLS cylinder head gasket for the 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Standard-bore application; head bolts/studs not included.
- Material: Multi-Layer Steel (MLS)
- Thickness: 0.95 mm (0.037")
- Bore: 105.4 mm (4.140")
- GTIN/UPC: 027067719898
Fitment
- 2001–2016 GM 6.6L Duramax: LB7, LLY, LBZ, LMM, LML (Left side)
Cross Reference & Related
- OE/GM reported refs: 98045058; 12637787 (left, Grade A, 0.95 mm; refs vary by year/engine).
- Alliant Power: AP0047 (0.95 mm, Left)
- Victor Reinz: 54583 / SKU MCI54583
- Related alternates: Left Grade B 1.00 mm (MAHLE 54584), Left Grade C 1.05 mm (MAHLE 54585), Right Grade A 0.95 mm (MAHLE 54580).
What’s Included
(1) Left-side cylinder head gasket only.
FAQ
Will it fit my Duramax?
Yes—fits 2001–2016 6.6L Duramax LB7/LLY/LBZ/LMM/LML on the left (driver) side.
Is it MLS and standard bore?
Yes—multi-layer steel, 0.95 mm thickness for standard-bore applications.
Do I need new bolts or studs?
Yes—replace TTY head bolts or upgrade to studs during reassembly (not included).
Which thickness do I need?
Duramax uses grade-specific thicknesses and side-specific gaskets; confirm piston protrusion/grade before ordering.
