Sierra 118-0418 Exhaust Manifold Mounting Gasket for Marine Engines

The Sierra 118-0418 exhaust manifold mounting gasket provides a reliable seal between the exhaust manifold and cylinder head on marine engines. Designed specifically for GM V-8 engines including 454, 482, 496, 502, and 540 cubic inch displacement models, this gasket is engineered to meet or exceed OEM specifications for dependable performance in the demanding marine environment.

Key Features:

• Designed for MCM/MIE GM V-8 engines (7.4L and 8.2L)
• Meets or exceeds original equipment standards
• Precision-engineered to match exhaust port configurations
• Built to withstand high temperatures and pressures in marine exhaust systems
• Compatible with Sierra manifolds 18-1957-1, 18-1982, 18-1929, 18-1933, and 18-1898

OEM Cross-References: Replaces Barr CHVA470000, MC47-27-46820, Crusader 96653, GLM 33760, Mallory 9-61400, Mercruiser 27-46820, OMC 909613, GM 3852472, Osco CW-GH, and Volvo Penta 3852472. This gasket is also included in Sierra mounting kit 18-8532.

Regular inspection and replacement of exhaust manifold gaskets is essential to prevent leaks and avoid potential engine damage. Sierra Marine gaskets are manufactured to provide boaters and marine mechanics with direct-fit solutions and added value through superior quality construction.