4.600 MLS Head Gasket .045 - Ford A460

The Cometic Gaskets 4.600 MLS Head Gasket .045 – Ford A460 is a precision cylinder head gasket engineered for big block Ford engines requiring a 4.600-inch bore and 0.045-inch compression thickness. This multi-layer steel gasket is the critical seal between the engine block and cylinder head, designed to contain combustion pressure, coolant passages, and oil galleries while maintaining absolute sealing integrity under extreme heat and pressure. Builders, engine shops, and enthusiasts restoring or modifying big block Ford powerplants rely on this gasket to ensure leak-free performance and long-term reliability.

Constructed from multi-layer steel (MLS), the 4.600 MLS Head Gasket features superior conformability and reusability compared to traditional composite gaskets, adapting to microscopic surface variations on both the block and head deck. The 0.045-inch compression thickness is a factory-specification dimension that affects combustion chamber volume and compression ratio—critical variables in engine tuning and performance calibration. MLS technology provides enhanced durability for high-compression and forced-induction applications, resisting blow-by and thermal fatigue common in modified or race engines. This gasket is manufactured to exacting OEM tolerances and sized specifically for the A460 cylinder head casting, ensuring proper fitment and clamp load distribution across all ports and passages.

This gasket is essential for anyone rebuilding, resurfacing, or upgrading big block Ford heads—including 427, 454, 460, and 427W applications where A460 heads are installed. Compatible with both OEM and performance cylinder heads featuring the A460 designation, it suits street engines, crate motors, and serious competition builds. Proper installation requires careful head deck preparation, appropriate torque sequence using a quality thread-locking compound, and OEM torque specifications for your specific engine application. The compact 1.13 lbs weight and professional-grade construction make this gasket a trusted choice for engine builders who demand dependable sealing in demanding powerplant environments.