Sierra 18-1843 MerCruiser V8 Dry Joint Exhaust Manifold

Sierra 18-1843 MerCruiser V8 Dry Joint Exhaust Manifold Replaces 8M0185794

All Sierra manifolds are manufactured as a direct OE replacement and are fully interchangeable with the OEM products they are designed to replace.

Features:

• Dry Joint Style
• Includes all the necessary gaskets and hardware for easy installation.
• Primed and painted for added durability and protection.
• Components are ready to install out-of-the-box.
• Backed by Sierra's comprehensive warranty.

Fits:

• MerCruiser (2002 & Newer)
• 5.0L MPI Alpha/Bravo 0M300000 - Up
• 5.0L CARB Alpha/Bravo 0M600000 - Up
• 5.7L CARB Alpha/Bravo 0M600000 - Up
• 350 MAG MPI Alpha/Bravo 0L010019 - Up
• 350 MAG MPI Horizon Alpha/Bravo 0M300000 - Up

Interchangeable With:

• MerCruiser
• 864308T01
• 865049T01
• 865735A02
• 8M0185794

• HGE
• 5735
• GLM
• 51237
• Barr
  • MC 1 865735

Includes:

• Exhaust Manifold Gasket 18-2949
• Drain Elbow Assembly 18-4224

Use With:

• Exhaust Elbow: 18-1845
• Riser Gasket (Closed): 18-0720
• Riser Gasket (Open): 18-0721
• Riser Gasket (Constricted): 18-0722

Frequently Asked Questions

What is the Sierra 18-1843 MerCruiser V8 Dry Joint Exhaust Manifold used for?

The Sierra 18-1843 is a direct OE replacement dry joint exhaust manifold for select MerCruiser V8 engines from 2002 and newer. It is specified for certain 5.0L and 5.7L applications, including 350 MAG MPI and 350 MAG MPI Horizon engines, within the listed serial-number ranges.

Which MerCruiser engines does the Sierra 18-1843 exhaust manifold fit?

The Sierra 18-1843 fits listed MerCruiser 5.0L MPI Alpha/Bravo, 5.0L CARB Alpha/Bravo, 5.7L CARB Alpha/Bravo, 350 MAG MPI Alpha/Bravo, and 350 MAG MPI Horizon Alpha/Bravo applications from 2002 and newer. Verify your engine model and serial number before purchasing.

What is included with the Sierra 18-1843 MerCruiser exhaust manifold?

The Sierra 18-1843 includes the 18-2949 exhaust manifold gasket and 18-4224 drain elbow assembly. The manifold also includes the necessary gaskets and hardware for installation, and its components are ready to install out of the box.

What features does the Sierra 18-1843 dry joint exhaust manifold have?

The Sierra 18-1843 uses a dry joint design and is primed and painted for added durability and protection. Sierra manufactures it as a direct OE replacement and states that it is fully interchangeable with the OEM products it is designed to replace.

What parts are listed as interchangeable with the Sierra 18-1843 exhaust manifold?

The Sierra 18-1843 is listed as interchangeable with MerCruiser 864308T01, 865049T01, 865735A02, and 8M0185794. Other listed interchangeable numbers include HGE 5735, GLM 51237, and Barr MC 1 865735.

What components are listed for use with the Sierra 18-1843?

The listed components for use with the Sierra 18-1843 include exhaust elbow 18-1845, closed riser gasket 18-0720, open riser gasket 18-0721, and constricted riser gasket 18-0722. Verify the applicable component before installation.

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