Product Description
Seal your LB7 top end the right way. The INDUSTRIAL INJECTION HS54580 head gasket set (upper head set) delivers OE-style sealing for 2001–2004 6.6L Duramax LB7 service. It includes the critical upper-engine gaskets and seals needed when pulling cylinder heads.
Fitment
- 2001–2004 Chevy/GMC 2500HD/3500HD — 6.6L Duramax LB7
What’s Included
- Complete upper head set (intake/exhaust manifold, valve cover, injector & miscellaneous upper-engine seals as supplied by HS54580)
Important Notes
- Head gaskets are not included in this set (order left/right MLS head gaskets separately).
- Head bolts/studs are not included (order new TTY bolts or upgrade to studs).
- Select head gasket grade (A/B/C) based on measured piston protrusion and deck specs.
Recommended Parts (CPP internal links)
- MAHLE 54585 LEFT HEAD GASKET — Grade C (1.05 mm)
- MAHLE 54582 RIGHT HEAD GASKET — Grade C (1.05 mm)
- ARP 230-4201 HEAD STUD KIT — 01–16 Duramax
- MAHLE GS33504 HEAD BOLT SET — 01–10 Duramax (one head)
- Shop All DURAMAX GASKETS & SEALS
FAQ
Does this kit include the head gaskets?No. HS54580 is the head set (upper set). Order left and right MLS head gaskets separately by grade.
How do I choose the correct head gasket grade?Measure piston protrusion and follow OE service data. Grade C (≈1.05 mm) is common, but always verify your build.
Should I reuse stock head bolts?No. LB7 uses torque-to-yield bolts; replace with new bolts or upgrade to ARP studs for clamping strength.
What else should I replace while I’m in there?Inspect injector seals/return washers, up-pipe and manifold gaskets, and coolant pipe O-rings; refresh as needed.
