4.375 MLS Head Gasket .098 - BBC

The Cometic Gaskets 4.375 MLS Head Gasket .098 is a multi-layer steel cylinder head gasket engineered specifically for Big Block Chevy engines. This precision gasket delivers reliable sealing across the combustion chamber with a bore diameter of 4.375 inches and a compression thickness of 0.098 inches, making it the correct replacement for BBC applications requiring exact OEM or performance specifications.

The multi-layer steel construction provides superior strength and conformability compared to single-layer designs, accommodating minor surface irregularities while maintaining consistent sealing pressure across varying cylinder pressures. The 0.098-inch thickness is critical to compression ratio preservation—too thick and you lose efficiency; too thin and you risk leakage. Cometic's MLS (multi-layer steel) technology ensures that thermal cycling and peak combustion pressures won't compromise the seal over extended use, whether in street engines or performance builds.

This gasket is designed for BBC engine builders and rebuilders who need factory-equivalent sealing without compromise. Whether you're restoring an original Big Block Chevy, rebuilding after a performance upgrade, or replacing a failed gasket in a running engine, this Cometic part meets the dimensional and material demands of Big Block applications. The 4.375-inch bore coverage ensures compatibility with standard BBC cylinder head and block configurations.

Cometic Gaskets has earned recognition in the automotive performance community for precision gasket manufacturing and material selection. Choosing the correct compression thickness prevents future coolant leaks, combustion bypass, and head gasket failures that compromise engine reliability and efficiency.