ZONFANT Cylinder Multi-Layer Head Gasket for LS1/LS6 V8 4.8L-5.7L — MLS, OEM Fit

ZONFANT Cylinder Multi Layer Head Gasket is a direct-fit, multilayer replacement gasket engineered for GM LS-series V8 engines (4.8L, 5.3L, 5.7L) used across many Chevy, GMC, Cadillac, Pontiac, Buick and Hummer models.

This head gasket kit includes two high-strength, multi-layer steel gaskets built to match original manufacturer dimensions and sealing features for LS1/LS6 family engines. It replaces part #26192PT and cross-references other OEM numbers so you can restore cylinder sealing, compression integrity, and coolant/oil separation after head work, rebuilds, or repairs. Before ordering, verify fitment against year, make, and engine displacement listed below.

Which vehicles and engines will this gasket fit?

This gasket is designed for GM LS-series V8 engines found in many late-1990s through 2019 vehicles. It supports 4.8L, 5.3L and 5.7L LS1/LS6-family engines used across Chevrolet, GMC, Cadillac, Buick, Pontiac and Hummer lineups.

• Chevrolet: Avalanche, Camaro, Colorado, Corvette, Express, Impala, Monte Carlo, Silverado, Suburban, Tahoe, Trailblazer (various years listed).
• GMC: Canyon, Envoy, Savana, Sierra, Yukon (various years listed).
• Cadillac/Buick/Pontiac/Hummer: CTS, Escalade, Allure, LaCrosse, Rainier, Firebird, Grand Prix, GTO, H3/H3T models.
• Replaces OEM references including #26192PT and common cross numbers—confirm against your vehicle VIN and service manual.

What materials and construction does the gasket use?

The gasket is a multi-layer steel (MLS) design with durable coatings engineered to handle thermal cycling and maintain consistent clamp load under repeated use. The MLS construction offers concentric sealing rings for combustion and layered cores for structural stability.

• Multi-layer steel plates for strength and flatness retention.
• Coated sealing surfaces to resist corrosion and improve conformity.
• Designed to match OEM bore spacing and fire-ring dimensions.

How should I install this gasket and what should I check during fitment?

Install MLS head gaskets on clean, flat surfaces with manufacturer torque sequences and specs. Inspect cylinder heads and block decks for warpage, clean all sealing surfaces, replace head bolts if required by your service manual, and follow proper torque steps to ensure a leak-free seal.

• Use specified torque sequence and incremental torquing values from the vehicle manufacturer.
• Measure head and block flatness; resurface if out of specification.
• Replace stretch bolts/fasteners when required and use new gaskets for reassembly.

What performance or durability can I expect compared with OEM gaskets?

This ZONFANT MLS gasket aims to meet original fit, form and function for everyday driving and moderate performance use. It is manufactured to tolerate heat, pressure, and common contaminants encountered in engine operation when correctly installed and maintained.

• Corrosion-resistant coatings for extended service life.
• Heat- and wear-resistant construction to handle thermal cycles.
• Designed to preserve combustion sealing and prevent coolant/oil cross-contamination.

Who is this for: Mechanics, restoration specialists, and DIY enthusiasts working on GM LS-series V8 engines who need an OEM-compatible, durable replacement head gasket. Ideal when performing cylinder head removal, engine overhauls, or repairing a failed head gasket in compatible Chevy, GMC, Cadillac, Buick, Pontiac or Hummer vehicles. Verify compatibility with your vehicle year, engine displacement and part numbers before purchase.