4.580 MLS Head Gasket .040 - BBC Marine

The Cometic Gaskets 4.580 MLS Head Gasket .040 — BBC Marine is a multi-layer steel cylinder head gasket specifically designed for Big Block Chevy marine engines. This gasket is essential for sealing the combustion chamber in high-performance marine powerplants, ensuring durability and compression integrity in challenging saltwater environments.

With a compression thickness of 0.040 inches, this gasket effectively manages deck height while its 4.580-inch bore accommodates large-displacement BBC marine blocks. The multi-layer steel construction provides superior sealing performance, resisting blow-through and maintaining a consistent seal under varying combustion conditions, which is critical for marine engine operation.

This gasket is ideal for boaters rebuilding BBC marine engines, whether for casual fishing trips or competitive offshore racing. Proper gasket selection is crucial to prevent catastrophic failures and ensure engine reliability in demanding marine environments.