Sierra 18-1848 Exhaust Manifold for 4.3L V6 Marine Engines

The Sierra 18-1848 is a heavy-duty cast iron exhaust manifold designed for 4.3L V6 marine engines in OMC and Volvo Penta stern drive applications. This high-quality replacement manifold is engineered to meet or exceed OEM specifications and is fully compatible with 1990 and newer OMC and 1993 and newer Volvo Penta 4.3GS, 4.3GL, and 4.3GI engines.

Key Features:

• Cast iron construction for durability in harsh marine environments
• Painted, packaged, and leak-tested for quality assurance
• Universal design fits either side of the engine (left or right)
• Accepts all factory original accessories and fittings
• Riser mating bolt dimensions: 3-7/8" x 2-19/32" bolt center-to-center
• Backed by Sierra's industry-leading customer satisfaction warranty

Important Notes: Gaskets are not included with this manifold. Use Sierra 18-2909 gasket for the cylinder head mating surface and Sierra 18-0943 for the riser mating surface. Each purchase includes one manifold.

OEM Cross-References: Replaces Volvo Penta 3857656, 3857678, OMC 3852338-7, GLM 51480, and HGE 7656.