Sierra 18-2912-1 Exhaust Manifold Gasket for MerCruiser OMC 3.0L Marine Engines

The Sierra 18-2912-1 is a premium exhaust manifold gasket designed for marine inboard and sterndrive applications. This critical sealing component creates a leak-proof connection between the exhaust manifold and cylinder head on MerCruiser and OMC marine engines with GM 181 CID (3.0L) 4-cylinder powerplants.

Key Features:

• Precision-engineered to match OEM specifications for proper exhaust port alignment
• Manufactured from high-quality gasket material designed to withstand extreme exhaust temperatures and pressures
• Direct replacement for OEM part numbers Mercury 27-53354, OMC 908079, and Mallory 9-61417
• Compatible with MerCruiser 140 HP engines (1968-1982) and OMC stern drives with 3.0L GM blocks
• Each gasket sold individually for precise replacement needs

Sierra Marine gaskets are engineered to meet or exceed original equipment manufacturer standards, providing reliable performance and durability in demanding marine environments. This exhaust manifold gasket helps prevent exhaust leaks, maintains proper engine backpressure, and protects against corrosive exhaust gases entering the engine compartment.