MWBJ LS3 MLS Head Gaskets Pair for 6.0L/6.2L LS Engines — 100mm Bore, 0.051 in Compressed

MWBJ Racing for BTR LS3 Multi-Layer MLS head gaskets (pair) are direct-fit, three-layer steel replacement gaskets engineered for 6.0L and 6.2L GM LS-series engines.

These MLS (multi-layer steel) head gaskets are made to match OEM form and durability for LS3, LQ4, LQ9, L96, L76, LY6, L92, and L99 platforms with a 100 mm bore and a compressed thickness of 0.051 inches. They serve as a cost-effective upgrade or replacement for factory three-layer gaskets, compatible with a wide range of GM, Chevrolet, GMC, Cadillac, Hummer, Pontiac, and Saab models. Before ordering, verify your engine code and OEM part number; the product references include 12571224, 12610046, 12697918, 12622033 and related cross-references.

Will these gaskets fit my 6.0L or 6.2L LS engine?

They are designed for LS-series engines with a 100 mm bore and are compatible with many 6.0L/6.2L variants, but fitment depends on exact engine code and year. Always cross-check the OEM part numbers or consult your VIN/engine label to confirm compatibility.

• Compatible engine codes: LS3, LQ4, LQ9, L96, L76, LY6, L92, L99
• Reference part numbers: 12571224, 12610046, 12697918, 12622033
• Bore size: 100 mm; compressed thickness: 0.051"
• Suggested vehicles: Corvette, Silverado, Suburban, Escalade, Yukon, Hummer H2, Saab 9-7X, Pontiac GTO

How do these MLS gaskets compare to the factory units?

These gaskets replicate the OEM three-layer steel construction and thickness, offering similar sealing performance and longevity. They’re intended as a direct replacement or economical upgrade without altering compression height or bore seal characteristics.

• 3-layer MLS construction for uniform sealing
• Matches OEM compressed thickness (0.051") for correct deck height
• Engineered for stock or mildly modified heads and blocks
• Manufactured to OEM-style tolerances for bolt patterns and ports

What installation and service tips should I follow?

Proper installation is crucial for long-term sealing: ensure flat, clean mating surfaces, follow the specified torque sequence, and replace head bolts if required by the vehicle manufacturer. Use the OEM torque specs and a calibrated torque wrench to avoid distortion.

• Inspect block and head deck for warpage or damage before fitting
• Clean gasket surfaces thoroughly; remove old sealant or debris
• Use the OEM torque sequence and re-torque/angle if specified
• Replace head bolts/studs when recommended by the service manual

Are these gaskets suitable for performance or boosted applications?

They are a robust OEM-style MLS design that handles stock and many mild performance builds, but extreme boost or high-power racing engines may require thicker or specialized gaskets. For high cylinder pressures, consult an engine builder to select the appropriate gasket material and thickness.

• Good for stock and moderately tuned engines
• Not intended as a dedicated extreme-racing gasket without expert evaluation
• Consider higher-spec MLS or copper gaskets for heavy forced induction

Who is this for: These MWBJ Racing for BTR LS3 MLS head gaskets are aimed at owners and mechanics replacing worn or leaking head gaskets on GM 6.0L/6.2L LS-series engines, enthusiasts performing cylinder head service, and DIYers seeking an OEM-equivalent, cost-effective MLS option. They suit restorations, routine engine rebuilds, and mild performance upgrades where stock geometry and OEM compatibility are required. If you’re unsure about fitment, provide your engine code or OEM part number to confirm before purchase.