Product Description
MAHLE 54580 is the RIGHT/PASSENGER-SIDE Grade A 0.95 mm multi-layer steel (MLS) cylinder head gasket for the 2001–2016 6.6L Duramax. Built to OE specs for dependable sealing on stock and tuned trucks. Standard-bore cylinders only; head bolts/studs not included.
- Side: Right (Passenger)
- Thickness/Grade: 0.95 mm, Grade A
- Construction: Multi-Layer Steel (MLS)
- Use: OE replacement / performance builds
- Note: For standard bore; replace TTY head bolts or upgrade to studs
Fitment
- 2001–2016 Chevrolet Silverado/GMC Sierra 2500HD & 3500HD — RPO codes: LB7 (2001–2004), LLY (2004.5–2005), LBZ (2006–2007), LMM (2007.5–2010), LML (2011–2016)
Cross Reference & Related
- OE GM: 98045055 (Right, 0.95 mm)
- Alliant Power: AP0050 (Right, 0.95 mm)
- MAHLE alternatives (Right): 54581 (Grade B, 1.00 mm), 54582 (Grade C, 1.05 mm)
- Left-side counterpart: MAHLE 54583 (Left, Grade A, 0.95 mm)
What’s Included
(1) Right-side MLS head gasket, 0.95 mm.
FAQ
Will this fit my truck?
Yes — it fits 2001–2016 6.6L Duramax LB7/LLY/LBZ/LMM/LML on the right/passenger side.
Is this MLS and standard bore?
Yes — it’s an MLS gasket designed for standard-bore cylinders.
Do I need new bolts or studs?
Yes — Duramax uses torque-to-yield bolts; replace them or upgrade to head studs at reassembly.
How do I pick thickness?
Grade A (0.95 mm) is stock thickness. If the head/block is machined, your builder may specify Grade B (1.00 mm) or Grade C (1.05 mm).
