4.165 MLS Head Gasket .060 - SBC

The Cometic 4.165 MLS Head Gasket .060 - SBC is a precision multi-layer steel cylinder head gasket engineered for small block Chevy engines requiring critical sealing performance. This gasket is purpose-built for engine builders, mechanics, and enthusiasts who demand reliability during high-performance builds, restorations, or stock repairs where OEM-equivalent or superior sealing integrity is non-negotiable. Whether you're freshening a 350, 383, or other small block variant, a quality head gasket is the foundation of block integrity and prevents costly coolant or oil leakage that can compromise engine longevity.

Manufactured by Cometic Gaskets, a leader in OEM and performance gasket technology, this multi-layer steel (MLS) design delivers superior sealing across the 4.165-inch bore diameter with a compressed thickness of 0.060 inch. MLS construction uses layered stainless steel faces bonded to elastomer cores, which conform to head and block deck surfaces while resisting blow-by, combustion pressure, and thermal cycling. The 0.060-inch thickness is critical for achieving proper clamping load distribution and maintaining the correct combustion chamber volume—altering compression ratio if undersized or oversized gaskets are substituted. Cometic's manufacturing tolerances ensure consistent performance across repeated heat cycles, making this gasket suitable for both naturally aspirated and lightly boosted applications.

This gasket is ideal for anyone rebuilding a small block Chevy, from classic car restorers to street rod builders and weekend warriors tackling a head gasket replacement. Installation requires proper head bolt torque sequencing and cleanliness of the block deck and cylinder head mating surfaces to achieve the gasket's rated sealing performance. Each gasket sold individually; verify your engine's specific bore diameter and compression ratio requirements before purchase to ensure correct fit and combustion chamber integrity. Proper installation with quality fasteners and adherence to manufacturer torque specifications will maximize gasket life and prevent future leaks.