4.200 MLS Head Gasket .051 - SBF

The Cometic Gaskets 4.200 MLS Head Gasket .051 – SBF is a multi-layered stainless steel cylinder head gasket engineered for Small Block Ford applications requiring precision compression sealing. The 4.200-inch bore diameter and 0.051-inch compression thickness are calibrated to meet OEM and performance rebuild specifications, making this gasket the go-to choice for both stock restoration and high-output engine builds seeking dependable sealing integrity across a wide RPM range.

Cometic's Multi-Layer Steel (MLS) design provides superior gasket durability and leak resistance compared to traditional composite head gaskets. The stainless steel composition resists corrosion and thermal fatigue, critical attributes for engines exposed to extended heat cycles or variable operating conditions. The 0.051-inch thickness is specifically matched to Small Block Ford cylinder head and block deck surfaces, ensuring proper combustion chamber volume and compression ratio stability. MLS gaskets are engineered to prevent blow-by and coolant leakage at the head-to-block interface, even under elevated boost or high-compression scenarios where conventional gaskets may fail.

This gasket suits restoration professionals, performance engine builders, and SBF enthusiasts rebuilding carbureted or fuel-injected mills from the 260ci to 406ci displacement range. Whether assembling a period-correct street engine, a weekend track car, or a high-output marine application, the precise bore diameter and compression thickness ensure proper cylinder sealing without interference fitment issues. The stainless steel construction provides longevity in salt-air environments and under prolonged thermal stress, reducing the likelihood of gasket failure between rebuilds.

Cometic Gaskets is recognized within the automotive performance industry for manufacturing precision-engineered gasket solutions that meet or exceed OEM specifications. The MLS head gasket standard has become the baseline for serious engine builders seeking leak-free, long-service-life sealing solutions across multiple application categories and power levels.