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

The Sierra 118-1848 is a cast iron cooling system manifold designed for 4.3L V6 Volvo Penta and OMC stern drive engines. This marine exhaust manifold fits many 1990 and newer OMC and 1993 and newer Volvo Penta 4.3L V6 marine gas engines, including 4.3GS, 4.3GL, and 4.3GI models.

Key Features:

• Constructed from durable cast iron with powder-coated black finish for corrosion resistance
• Universal design fits either side of the engine and accepts all factory original accessories and fittings
• Professionally painted, packaged, and leak-tested for quality assurance
• Manufactured to meet or exceed OEM specifications

Replaces OEM Part Numbers:

• Volvo Penta: 3857656, OMC Stern Drive: 3852338
• Volvo: 8847499
• GLM: 51480

Exhaust manifolds are critical components that will not last forever—ignoring a corroded manifold could lead to serious engine problems. This Sierra replacement manifold provides reliable, trouble-free service to keep your marine engine running at peak performance.