ZONFANT Gen III LS Engine Head Gasket Set for 4.8L-6.0L — MLS Head Gaskets & Full Seal Kit

ZONFANT GEN 3 III LS Engine Head Gasket Set is a complete replacement gasket kit engineered to fit GM 4.8L, 5.3L, 5.7L and 6.0L Gen III/LS engines for a reliable, direct-fit rebuild.

This comprehensive gasket set contains the essential seals and multilayer steel head gaskets needed when servicing or rebuilding LS-series engines. Supplied parts match common OE part numbers and cover valley, head, oil pan, timing cover, valve cover, rear cover and other seals so you can return the engine to proper sealing without sourcing multiple components separately.

What exactly comes in this LS engine gasket kit?

The kit ships with a curated set of gaskets and seals for a Gen III LS rebuild. It includes two MLS head gaskets for LS9/LS-series applications plus valley, oil pan, timing and rear seals along with smaller grommets and adapter gaskets.

• 1× Gen III valley cover gasket (OE 12558178)
• 2× LS head gaskets (OE 12617944, 12622033 for MLS variations)
• 1× oil pan gasket (OE 12612350) and 1× front cover gasket (OE 12633904)
• Rear main seal, damper seal, valve cover gaskets, water pump gaskets, knock sensor grommets and oil filter adapter gasket

Which vehicles and engines are compatible with this gasket set?

Designed to suit many GM trucks and SUVs with Gen III LS architectures, the kit covers a broad model and engine range. Check individual OE numbers and your vehicle’s engine code before ordering to ensure fitment.

• Chevy: Silverado (1500/2500/2500HD/3500/3500HD), Express 3500, Suburban 2500
• GMC: Sierra 1500/2500/2500HD across listed model years
• Fits LS variants including LS1, LS2, LS3, LS6, LQ4, LQ9 and many 4.8L–6.0L iron-block applications

How does this kit compare to OEM parts and what should I expect during installation?

ZONFANT gaskets are produced to meet or exceed OEM tolerances, using multilayer steel where required and durable rubber seals elsewhere. Expect a direct-fit installation for covered components, but note the kit excludes intake manifold gaskets and other non-listed items.

• OE-equivalent materials and dimensions for direct replacement
• Includes MLS head gaskets for proper sealing under combustion pressures
• Installation requires standard engine teardown and torque sequences — follow OEM specs

What precautions and checks should I perform before ordering or installing?

Confirm vehicle year, engine displacement and existing OE numbers before purchase. Inspect block and head surfaces for warpage or damage; gaskets seal best to clean, flat surfaces. Weather and workshop conditions can affect sealing compound and installation success.

• Verify compatibility with listed OE part numbers prior to purchase
• Replace only the parts included; intake manifold gaskets are not in this kit
• Use a calibrated torque wrench and follow manufacturer torque specs and sequences

Who is this for: This ZONFANT GEN 3 LS gasket kit is intended for mechanics, DIY engine rebuilders and fleet technicians working on GM LS-series V8 engines who want a single, OE-referenced gasket set for a valve cover-to-rear-seal rebuild. It’s ideal when performing a head job, timing cover service, oil pan removal, or a full engine refresh where original part numbers match and intake gaskets are handled separately. If you need a complete intake manifold sealing solution, add the specific intake gaskets to your parts list before starting the job.