Sierra 18-1957-2 MerCruiser 340 454 V8 Big Block Marine Exhaust Manifold 89011


Only 1 left in stock

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Product Details

New exhaust manifold for MerCruiser 330, 340, and 454 Magnum Big Block V8 marine gas engines (GM/Chevrolet). This manifold is a center rise style, will fit either side of the engine, and accepts all original mounting brackets. Comes with gaskets and all necessary plugs. Each purchase is for one manifold.

This part is new and high-quality cast iron construction. To determine if this is the correct replacement for you, look on your current part for casting numbers and match them to the cross reference below:

Cross ReferencePart Number
MerCruiser807078A6, 89011A8, 89011
Osco Motors9011
Barr MarineMC-1-89011
Sierra Marine18-1957-1, 18-1957-2
Aqua Power5506
GLM Products51240
Marine Power0991-100

About Sierra
Sierra provides premium-quality aftermarket replacements for over 6,000 marine parts, tools, and components. Sierra products are engineered to meet or exceed OEM standards, and stand up in harsh marine environments. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of the product against any defects in workmanship and materials.

Additional information

Product Specifications
Part Number18-1957-2
Item Weight54.9 lbs
Manufacturer Part Number18-1957-2
Country of ManufactureTaiwan
Shipping Weight55 lbs
Shipping Dimensions21" x 10" x 7"
WarrantyLimited Lifetime
TypeExhaust Manifold