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Add to CartThis Sierra aftermarket exhaust elbow is for use with Mer Cruiser V6/V8 GM engines with dry joint exhaust manifolds. This exhaust manifold is for 2004 and newer V6/V8 GM 305, 350,m & 377 engines 0W310000 & Up as well as 2002 and newer GM 350 & 377 engines 0M317000 & Up.
Application Info:
Interchangeable With:
Use With:
What is the Sierra 18-1845 MerCruiser V6/V8 GM Dry-Joint Exhaust Elbow used for?
The Sierra 18-1845 is an aftermarket exhaust elbow designed for MerCruiser V6/V8 GM engines with dry-joint exhaust manifolds. It is specified for the listed 4.3L, 5.0L, and 350 MAG MPI applications and is intended for use with compatible dry-joint exhaust manifold systems.
What MerCruiser engines does the Sierra 18-1845 exhaust elbow fit?
The Sierra 18-1845 fits the listed MerCruiser V6 and V8 applications, including 4.3L MPI, 4.3L CARB, 5.0L MPI, 5.0L CARB, 350 MAG MPI, and 350 MAG MPI Horizon engines. The description specifies different serial-number ranges for these applications, so verify your engine model and serial number before purchasing.
What are the serial-number requirements for the Sierra 18-1845?
Application depends on the specific MerCruiser engine. Listed ranges include 4.3L MPI Alpha/Bravo from 0M30000 and up, 4.3L CARB from 0M615000 and up, 5.0L MPI from 0M300000 and up, 5.0L CARB from 0M600000 and up, 350 MAG MPI from 0L010019 and up, and 350 MAG MPI Horizon from 0M300000 through 1A299999.
Which exhaust elbow is the Sierra 18-1845 interchangeable with?
The Sierra 18-1845 is listed as interchangeable with MerCruiser 864591T02, HGE 4591, GLM 51147, and Barr MC20864591. Verify your engine and exhaust system application before selecting an interchangeable exhaust elbow.
Which manifolds and riser gaskets can be used with the Sierra 18-1845?
The Sierra 18-1845 is listed for use with Sierra 18-1842 and 18-1843 manifolds. The listed compatible riser gaskets are Sierra 18-0720 for closed applications, 18-0721 for open applications, and 18-0722 for restricted applications.
What should I verify before purchasing the Sierra 18-1845 exhaust elbow?
Verify that your engine is a listed MerCruiser V6 or V8 GM application with a compatible dry-joint exhaust manifold. Check the specific engine model and serial-number range against the application information, and confirm the manifold and riser gasket requirements before purchasing.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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