MANATEE MLS Cylinder Head Gasket Set for GM LS V8 4.8L/5.3L/5.7L – 2 PCS, Multi-Layer Steel Seal

MANATEE MLS Cylinder Multi-Layer Head Gasket 2PCS 12589226 is a direct-fit multi-layer steel head gasket engineered for GM LS-series V8 4.8L, 5.3L and 5.7L engines to restore a reliable head-to-block seal.

This replacement head gasket kit is designed to meet OEM form and function for a wide range of Chevrolet, GMC, Buick, Pontiac, Cadillac, Saab and Hummer models from the early 2000s through mid-2010s. Manufactured with multi-layer steel construction and precision-cut sealing beads, the set aims to deliver consistent compression sealing, improved durability over single-layer materials, and compatibility with factory torque sequences and surfaces.

Which engines and part numbers does this gasket replace?

This kit covers GM LS-family V8 engines, including 4.8L, 5.3L and 5.7L variants. It is cross-referenced to several OEM numbers so you can match it to your original gasket.

• Direct cross-references: 12589226, 12498544, 12565390, 12573949, 98544.
• Fits vehicle applications across Chevrolet, GMC, Buick, Pontiac, Cadillac, Saab, and Hummer model years listed by OEM fitment.
• Intended for LS1/LS6 style heads used in many 2002–2017 GM V8s.

How does the multi-layer steel (MLS) design benefit sealing and engine life?

MLS gaskets use alternating layers of steel with coated sealing beads to maintain a uniform clamp load and resist blowouts where combustion pressure is highest. This construction handles the thermal cycles and cylinder pressures typical of high-output V8s better than older single-layer designs.

• Multiple steel layers reduce deformation under heat and torque.
• Coated sealing beads concentrate sealing where cylinder pressure is greatest.
• Improved resistance to coolant and oil leakage at head interfaces.

What should I check before installation to ensure correct fitment?

Confirming engine family, model year, and original part number is the quickest way to avoid mistakes. Also inspect the cylinder head and block mating surfaces for flatness and cleanliness—MLS gaskets require proper surface prep and correct bolt torque to seal effectively.

• Verify OEM or replacement part numbers against your vehicle's service manual.
• Resurface or dress head/block faces if warped or damaged before installing.
• Use recommended torque sequence and specifications from the manufacturer.

Are there durability or warranty considerations I should know?

This kit is manufactured to match OEM geometry and materials for reliable service when installed correctly. The product typically comes with seller-backed support; inspect the gasket set upon receipt and follow recommended installation practices to maximize life span.

• Produced to OEM-style standards for form, fit, and function.
• Seller provides after-sales support and technical assistance if needed.
• Longevity is tied to installation quality, head/block condition, and proper torqueing.

Who is this for: Technicians, experienced DIYers, and fleet maintenance teams replacing head gaskets on GM LS-series V8 engines who need a multi-layer steel (MLS) solution that matches OEM specifications. Choose this kit if you require direct-fit part number cross-references, improved sealing over older gasket technologies, and a replacement intended for the 4.8L, 5.3L and 5.7L LS-family engines commonly found in Chevrolet, GMC, Buick, Pontiac, Cadillac, Saab and Hummer vehicles.