4.150 MLX Head Gasket .052 GM LS 6.0L/6.2L

The 4.150 MLX Head Gasket .052 for GM LS 6.0L/6.2L engines is purpose-built for builders and enthusiasts tackling high-performance LS platform builds. Whether you're assembling a stroker motor, refreshing a tired engine block, or pushing boost on a supercharged or turbocharged application, this gasket delivers the sealing integrity required for modern power levels. Head gasket selection is critical—undersizing or oversizing directly affects combustion chamber volume, compression ratio, and peak pressure containment, making this specification-grade component non-negotiable for reliable performance.

The .052 inch thickness and 4.150 inch bore size are precisely engineered to maintain optimal compression geometry while ensuring a perfect seal between the cylinder head and block. MLX-series gaskets from Cometic feature advanced composite materials and spring steel wire reinforcement rings that resist blowby, coolant leakage, and combustion gas escape across extended RPM ranges and elevated boost pressures. The gasket's design accommodates the tight tolerances and aggressive clamping loads typical of modern LS engine builds, from naturally aspirated 6000+ RPM street engines to heavily forced-induction applications. Thickness matters: too thin and compression climbs unpredictably; too thick and clamping load on fasteners decreases, inviting failure.

This gasket suits 6.0L and 6.2L LS platforms—including LS2, LS3, LSA, and LS9 variants—and is ideal for engine builders, performance shops, and dedicated enthusiasts executing complete rebuilds or performance upgrades. Proper installation requires clean deck surfaces, correct head bolt torque sequencing, and verification of block/head flatness; precision here ensures the gasket seals for thousands of miles without re-torquing. Pair this with quality fasteners and a torque wrench to achieve reliable performance in street, strip, or road-course applications.