Product Description
MAHLE 54582 RIGHT HEAD GASKET — GRADE C (1.05 MM) is an OE-quality multi-layer steel (MLS) gasket for the right/passenger bank on 2001–2016 GM 6.6L Duramax engines. It uses Combustion Load Limiter (CLL) technology for reliable sealing under high cylinder pressures. Designed for standard bore applications; head bolts not included.
- Side: Right (passenger)
- Thickness/Grade: 1.05 mm (Grade C)
- Material/Tech: MLS with CLL technology
- Bore: 105.4 mm (4.140")
- UPC/GTIN: 027067719874
Fitment
- Engines: 6.6L Duramax LB7 (2001–2004), LLY (2004.5–2005), LBZ (2006–2007), LMM (2008–2010), LML (2011–2016)
- Vehicles: Chevrolet Silverado 2500HD/3500/3500HD (2001–2016); GMC Sierra 2500HD/3500HD (2001–2016); Chevrolet Express 2500/3500/4500 (2006–2016); GMC Savana 2500/3500/4500 (2006–2016); Chevrolet/GMC C4500–C5500 Kodiak/TopKick (2003–2007)
Cross Reference Numbers
- GM / ACDelco: 12637788 (Right, Grade C), supersedes 98045060
- Mahle / Victor Reinz: 54582
- Left-side counterpart (Grade C): MAHLE 55027 (for the driver bank)
What’s Included
Single right-side MLS head gasket. Head bolts/studs sold separately.
FAQ
Will this fit my 2001–2016 Duramax?
Yes—fits LB7, LLY, LBZ, LMM, and LML engines listed above. Verify bank (right/passenger) before ordering.
Is Grade C equal to 1.05 mm?
Yes—Grade C is 1.05 mm (approx. 0.041").
Does this include head bolts?
No—use new TTY bolts or upgrade to ARP head studs.
Is it for standard bore?
Yes—this gasket is noted for standard-bore cylinders.
