ZONFANT Cylinder Multi-Layer Steel Head Gasket for LS1/LS6 V8 4.8L-5.7L — MLS, 2-Pack, OEM Fit

ZONFANT Cylinder Multi Layer Head Gasket is a direct-fit MLS replacement engineered for LS1/LS6 V8 4.8L, 5.3L and 5.7L engines to restore reliable cylinder sealing.

This multi-layer steel (MLS) head gasket from ZONFANT is made to match OEM form and function for many GM V8 applications. Designed to resist heat, corrosion and blow-by, it replaces factory part numbers such as #26192PT and other equivalent references. Each package contains two head gaskets and is intended for engine rebuilds, head resurfacing jobs or whenever a dependable head seal is needed to return compression and coolant integrity.

Which GM models and years will this gasket fit?

This gasket fits a wide range of GM platforms that use LS1/LS6 family blocks. Compatible vehicle coverage includes Cadillac, Chevrolet, GMC, Pontiac, Buick and Hummer models spanning late 1990s through mid-2010s—verify your engine code and block type before ordering.

• Cadillac: 2004–2007 CTS; 2004–2014 Escalade/Esv/EXT
• Chevrolet: Camaro (1998–2002), Corvette (2002–2004), Silverado/Sierra/Tahoe/Suburban variants (1999–2019) and more
• GMC: Canyon, Envoy, Savana, Sierra, Yukon families (2000–2019 coverage)
• Also fits Pontiac Firebird/Grand Prix/GTO, Buick LaCrosse/Allure/Rainier, Hummer H3/H3T

How does this MLS design help engine performance and longevity?

Multi-layer steel construction offers a consistent, spring-like sealing surface that tolerates thermal cycling and head distortion better than single-layer gaskets. That improves sealing for combustion chambers and coolant passages, reducing the risk of compression leaks or coolant mixing when installed correctly.

• Resists heat and repeated expansion/contraction
• Improves sealing on resurfaced or slightly warped heads
• Reduces likelihood of blow-by and compression loss
• Corrosion-resistant layers help maintain long-term integrity

What should I check before installation to ensure fit and function?

Confirm your engine family (LS1/LS6), bore size and factory part cross-references before installing. Head gaskets must match the block/head deck condition; heads should be cleaned and checked for flatness, and proper torque sequence and values must be used during assembly.

• Verify part compatibility with your VIN, engine code or OEM part numbers (#26192PT, #12589226, 12498544)
• Inspect and machine head deck if warpage exceeds specs
• Use correct head bolts/studs and torque in manufacturer sequence
• Replace coolant and oil as needed after reassembly

What comes in the box and what support does ZONFANT provide?

The package includes two identical head gaskets to service both cylinder heads on V8 engines. ZONFANT supplies customer support for fitment questions and will assist with product concerns if any issues arise after purchase.

• Includes: 2 x cylinder multi-layer head gaskets
• Replacement and cross-reference numbers provided for confirmation
• Customer support available for fitment or product questions
• Follow vehicle manufacturer assembly procedures for best results

Who is this for: The ZONFANT Cylinder Multi Layer Head Gasket is intended for professional mechanics, home engine builders and restoration specialists who are repairing or rebuilding GM LS-series V8 engines. Choose this gasket if you need an MLS replacement to meet OEM-style sealing performance on 4.8L, 5.3L or 5.7L V8s across Chevy, GMC, Cadillac, Pontiac, Buick and Hummer platforms. Always confirm compatibility with your vehicle’s engine code, part cross-references and service manual before beginning the job.