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Sierra 18-1903 Marine Exhaust Manifold Replacement for OMC 912442

Manufacturer

Picture for manufacturer Sierra

Part Number

18-1903
18 reviews
Sale Price

$331.04

1 left at this price

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-1903 is a direct-fit replacement exhaust manifold designed to meet or exceed OEM specifications for select OMC marine engines. Sierra manifolds are precision-manufactured to ensure proper fit and long-lasting performance in demanding marine environments.

Each manifold is painted for corrosion resistance, individually packaged, and leak tested before leaving the factory — giving you confidence in quality right out of the box. This part directly replaces OEM part number 912442.

Key Features:

  • Factory painted finish for enhanced corrosion and rust resistance
  • Leak tested prior to packaging for quality assurance
  • Manufactured to OEM specifications for reliable fit and function
  • Direct replacement for OMC OEM part number 912442
  • Designed for use in saltwater and freshwater marine applications

Sierra International is a trusted name in aftermarket marine parts, offering a comprehensive line of engine components backed by rigorous quality control standards.

Tires are exactly what I ordered and delivery was on time via FedEx.

All around good experience. Easy ordering, quick delivery, and great price for quality product.

Order arrived on time in good shape.

Great

Ordering was about as easy as it can get.

Easy and quick

So far I have only ordered the parts. Online shopping was okay, but some items cost less and others cost more than listed. Overall this was okay because overall pricing was excellent.

great selections, great value, easy site to navigate

good price

no tax free shipping thumbs up in my book

good

Shopping was fast and easy, however tracking my package was a nightmare. Went to their site and put in last name, order number, and zip code and there internet system could not match me up with anything. Called customer service and they could not provid

all good so far

Order was correct and came quicker than I expected, I will definitely use Autoplicity again.

Very friendly customer service! They also shipped my radiator out very quickly. I will definetly be ordering from autoplicity again!

very easy to use check out and good prices

quick and reasonably priced

Autoplicity had what I wanted at the lowest price I could find and shipped it fast. The online ordering form was a little awkward to use as was calling customer service. I called customer service and the guy answered "yea".

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