4.155 MLS Head Gasket .040 - SBF SVO

The 4.155 MLS Head Gasket .040 - SBF SVO from Cometic Gaskets is a precision-engineered component designed for Small Block Ford (SBF) and SVO-platform engine builders who demand reliability in high-performance applications. This multi-layer steel (MLS) gasket serves as the critical seal between your cylinder head and engine block, preventing combustion gas and coolant leakage while maintaining compression integrity under extreme conditions. Whether you're rebuilding a stock engine or pushing power limits on a modified platform, a quality head gasket is non-negotiable for longevity and performance.

Cometic's MLS technology utilizes multiple layers of specially treated steel to create a superior seal compared to conventional composite gaskets, especially under boost or high cylinder pressures. The .040-inch thickness is calibrated for SBF/SVO head and block combinations, ensuring proper compression ratio maintenance and optimal sealing performance. MLS gaskets excel in resisting blow-out and degradation from fuel additives, coolant chemistry, and thermal cycling—making them the standard choice for any engine destined for dyno work, forced induction, or extended high-RPM operation. The 4.155-inch bore diameter matches the precise specifications required for SBF platform compatibility.

Mechanics and engine builders trust Cometic gaskets for street engines, race applications, and everything in between. This gasket is essential when replacing heads, rebuilding after a failure, or assembling a long-block from the ground up on SBF or SVO engines. During installation, proper head bolt torque sequencing and correct block/head surface finish (typically 32 Ra or better) ensure optimal gasket seating and longevity. Use with quality head studs or bolts, and follow OEM or builder specifications for your specific SBF variant to avoid reseating issues and ensure the gasket performs as designed.