Product Description
MAHLE HS54580A is an OE-quality complete upper engine head set for 2004.5–2007 GM 6.6L Duramax LLY/LBZ. Includes molded-rubber intake gaskets, multi-layer steel exhaust manifold gaskets, injector O-rings/crush washers, RTV for valve cover sealing, and other top-end seals for both banks. Head gaskets and head bolts are not included.
- Direct-fit replacement components for both cylinder banks
- Intake gasket material: molded rubber
- Exhaust manifold gasket material: multi-layer steel (MLS)
- Item grade: OEM standard
- Warranty: 1-Year Limited
- GTIN/UPC: 027067726407
Fitment
- 2004.5, 2005, 2006, 2007 Chevrolet Silverado/GMC Sierra 2500HD & 3500 with 6.6L Duramax LLY/LBZ
Cross Reference Numbers
- GM/Chevrolet: 98403365, 98434773
- Mahle/Alt: HSU262691
What’s Included
Upper engine gaskets/seals for both banks including intake, exhaust, valve cover perimeter RTV, injector sealing hardware, and associated O-rings/gaskets for a complete top-end refresh. Head gaskets & head bolts sold separately.
FAQ
Does this kit include injector O-rings?
Yes, injector O-rings are included.
Can I use A, B, or C-grade head gaskets with this set?
Yes—this head set works with A/B/C grade Duramax head gaskets.
Are head gaskets and head bolts included?
No. Add the correct grade head gaskets and new head bolts or studs during reassembly.
What materials are used?
Molded-rubber intake gaskets and MLS exhaust manifold gaskets for OE-level sealing.
