Product Description
MAHLE 54581 right/passenger-side cylinder head gasket — Grade B (1.00 mm) for 2001–2016 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Multi-Layer Steel (MLS) with combustion load limiter for reliable sealing under boost, towing, and heavy duty use.
- Position: Right (passenger side)
- Thickness/Grade: 1.00 mm (Grade B)
- Material: MLS w/ Combustion Load Limiter (CLL)
- GTIN/UPC: 027067719850
Fitment
- 2001–2004 Silverado/Sierra 2500HD/3500HD (LB7)
- 2004.5–2007 Silverado/Sierra 2500HD/3500HD (LLY/LBZ)
- 2007.5–2010 Silverado/Sierra 2500HD/3500HD (LMM)
- 2011–2016 Silverado/Sierra 2500HD/3500HD (LML)
Cross Reference Numbers
- GM/ACDelco: 98045056, 97309560, 98030629
- Fel-Pro: 26272PT, 26272PT1
- MAHLE: 54581
What’s Included
One (1) right-side head gasket only. Head bolts/studs sold separately.
FAQ
Is this the right (passenger) side?
Yes — 54581 is the right side head gasket for 6.6L Duramax 2001–2016.
How do I choose the correct thickness?
Grade B is 1.00 mm. Confirm required thickness/grade based on piston protrusion and any head/block machining.
Are bolts or studs included?
No. Replace torque-to-yield head bolts or upgrade to ARP studs during reassembly.
Will this work with LB7, LLY, LBZ, LMM, and LML?
Yes — applications cover 2001–2016 Duramax generations listed above.
Any install tips?
Verify surface flatness and RA finish for MLS gaskets; follow GM torque sequence and specs.
