Best Lbz Head Gasket Kit

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This guide is limited to the 2006–2007 6.6L Duramax LBZ, normally VIN D. Confirm the engine code before ordering: a late 2006 LLY carry-over may be listed by some specialists, but LMM fitment is not proof that a gasket or installation kit is correct for every LBZ. A head job needs a matched left-and-right gasket pair in the required grade or thickness plus the seals actually disturbed. Head studs by themselves are not gasket kits. Complete repair kits are listed first; the labelled component and overhaul alternatives are for a machine shop or builder who has already established grade, bore and scope.

Pick 01 of 09

Kennedy Diesel LBZ Head Gasket Kit, SKU 747

Exact-match complete repair kit for 2006–2007 LBZ, including two Grade C head gaskets, manifold and up-pipe gaskets, injector coppers and O-rings, intake, EGR, cooling seals and AC Delco sealant.

• 2006–2007 LBZ fit
• pair of Grade C head gaskets
• top-end seal assortment

Pros

• $615 observed price
• Contents are specifically listed

Cons

• Head studs and bolts are separate additions
• Valve-cover gaskets are excluded unless damaged

Price: $615

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Pick 02 of 09

Merchant Automotive LBZ Head Gasket Kit, MAT-10113

Exact-match 2006–2007 LBZ kit with OEM Grade C right and left head gaskets, upper valve-cover gaskets and required seals and gaskets.

• 2006–2007 LBZ fit
• right and left Grade C gaskets
• upper valve-cover gaskets

Pros

• $513.91 observed price
• Pair is explicitly included

Cons

• Fasteners are not stated in this listing
• Confirm every ancillary seal for the planned scope

Price: $513.91

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Pick 03 of 09

Merchant Automotive LBZ Head Gasket Kit with Exhaust Manifold Gaskets, 10107

Exact-match LBZ kit adding 36 OEM-replacement head bolts and exhaust-manifold gaskets to a Grade C left-and-right gasket and seal package.

• 2006–2007 LBZ fit
• 36 replacement head bolts
• exhaust manifold gaskets

Pros

• $757.10 observed price
• Includes both head gaskets and bolts

Cons

• Reusable lower steel valve-cover gaskets are excluded
• Not an ARP-stud kit

Price: $757.10

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Pick 04 of 09

Diesel Part Deals Duramax Complete Head Gasket Kit, LBZ configuration

A configurable complete repair package: select LBZ 2006–2007 and the left-and-right Grade C gasket, fastener and optional glow-plug choices needed for the build.

• LBZ 2006–2007 selection
• upper engine gasket set
• Grade C pair and fastener options

Pros

• $650 observed starting price
• Separates gasket and fastener choices

Cons

• Select LBZ rather than assuming cross-generation fit
• Options change the final contents and price

Price: $650 and up

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Pick 05 of 09

Merchant Automotive LBZ Engine Gasket Kit, lbzegk

An LBZ-specific 2006–2007 engine-gasket kit with optional ARP fastener selection, suited to a broader repair scope than a bare head-gasket pair.

• 2006–2007 LBZ fit
• engine gasket kit
• ARP option

Pros

• $899.63–$2,423.95 observed range
• Two-year warranty stated

Cons

• Configuration determines final contents
• Not a single fixed-price head-gasket pair

Price: $899.63–$2,423.95

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Pick 06 of 09

DmaxStore Head Gasket Replacement Package, DMAX-LBZ/LMM-HG

A labelled LBZ/LMM repair package for replacing both head gaskets; it includes Genuine GM Head Gasket Install Kit 98434773, so confirm the selected application and fastener option.

• LBZ/LMM labelled package
• both head gaskets
• GM install kit 98434773

Pros

• .43 observed price
• Includes GM install kit 98434773 and C-series left/right gaskets

Cons

• Also serves LMM, so confirm LBZ configuration
• Do not treat a shared listing as universal fit

Price: $649.43

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Pick 07 of 09

Victor Reinz Grade C LBZ Head-Gasket Pair, 61-36460-20 and 61-36465-20

Component alternative, not a complete kit: matched right and left 1.05-mm Grade C gaskets for 2006–2007 LBZ; Victor Reinz also specifies a 106-mm-bore version separately.

• right 61-36460-20
• left 61-36465-20
• 1.05-mm Grade C thickness

Pros

• Observed left/right prices total .46
• Exact left/right part numbers

Cons

• No ancillary seals or bolts
• Do not substitute the 106-mm-bore version without engine-build confirmation

Price: about $140 per pair (MAHLE sells the same Grade C gasket at $68.90 each)

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Pick 08 of 09

MAHLE Grade C LBZ Head-Gasket Pair, 55026 and 55027

Component alternative, not a complete kit: MAHLE’s 1.05-mm Grade C right and left gaskets for the LBZ listing; the 106-mm-bore pair is separately numbered 54598 and 54597.

• right 55026
• left 55027
• 1.05-mm Grade C thickness

Pros

• .95 observed pair price
• Separate 106-mm option prevents a bore assumption

Cons

• Requires a separate seal package
• Pair is not a fastener kit

Price: $138–$150 per pair ($68.90 each)

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Pick 09 of 09

MAHLE HS54580A Upper Gasket Set

Clearly labelled component alternative for the 2006–2007 LBZ: an upper gasket set that excludes head gaskets, so it must be paired with the correctly selected left and right head gaskets.

• 2006–2007 LBZ listing
• upper gasket set
• excludes head gaskets

Pros

• .99 observed price
• Avoids silently assuming gasket grade

Cons

• Not a complete head-gasket kit
• Head-gasket pair and fasteners are separate

Price: $235–$320

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Buying tips

• Identify VIN, build date, piston protrusion and any machine-shop bore work before choosing thickness, grade or a 106-mm-bore gasket.
• Buy a left-and-right matched pair; do not count duplicate retailer listings as different gaskets.
• A professional torque procedure, clean deck surfaces and the correct fasteners matter as much as the gasket. Studs alone are not a head-gasket kit.

As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.