Sierra 18-1843 Dry Joint Exhaust Manifold MerCruiser V8

The Sierra 18-1843 is a cast iron dry joint exhaust manifold designed as a direct OE replacement for MerCruiser V8 marine engines. This manifold fits 5.0L, 5.7L, and 6.2L engines (305, 350, and 377 CID) from model year 2002 and newer equipped with dry joint exhaust systems.

Key Features:

• Cast iron construction with center rise design for durability in harsh marine environments
• 100% leak tested to ensure quality and reliability
• Includes manifold-to-head gasket, mounting bolts, and plugs for complete installation
• Primed and painted for added corrosion protection
• Computerized CNC machining ensures proper gasket mating surfaces and precision tolerance control
• Ready to install out-of-the-box with all necessary hardware

This manifold directly replaces MerCruiser part numbers 865735A02, 865049T01, 864308T01, and 8M0185794. Designed to work with Sierra riser 18-1845 and riser gaskets 18-0720 (closed), 18-0721 (open), or 18-0722 (restricted). Manifold gasket 18-2949 is also recommended (riser gasket not included). Manufactured to meet or exceed OEM specifications and backed by Sierra's comprehensive warranty for the useful life of the product.