Sierra 18-2912-1 Marine Exhaust Manifold Gasket for MerCruiser MCM 140 & GM 3.0L 4-Cylinder Engines

The Sierra 18-2912-1 is a marine exhaust manifold gasket engineered as a direct replacement for MerCruiser MCM 140 and GM 3.0L (181 cu. in.) 4-cylinder inboard and sterndrive engines. This combination intake and exhaust manifold gasket is designed to deliver a precise, leak-free seal and is manufactured to meet or exceed OEM specifications.

Key Features:

• Direct OEM replacement gasket — sold individually
• Engineered to meet or exceed original manufacturer specifications
• Designed for GM 3.0L 181 cu. in. 4-cylinder marine engines
• Compatible with MerCruiser and OMC applications
• UPC: 808282365844

OEM Cross-Reference Numbers:

• Mercury / MerCruiser: 27-53354
• OMC: 908079
• Mallory: 9-61417

Sierra marine engine components are trusted by boaters and marine mechanics alike. Replacing the exhaust manifold gasket during every manifold service is critical to preventing exhaust leaks and protecting the engine from water intrusion and corrosion damage.