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Your cart is empty.Sierra's 18-4367 Exhaust Manifold Gasket Set is designed for use with GM 153 and 181 (2.5L & 3.0L) CID engines: 120 HP and 140 HP (s/n 6229718 & Up). The set contains: (1) Sierra 18-2832-1 Manifold End Cap Gasket, (1) Sierra 18-0928-1 Manifold End Cap Gasket, (1) Sierra 18-1204-1 Exhaust Manifold Mounting Gasket, (1) Sierra 18-2833 Exhaust Elbow Gasket, (1) Sierra 18-2831 Thermostat Cover Gasket, and (1) Sierra 18-0994 Carburetor Mounting Gasket. It is interchangeable with Barr MC47-27-99777A1, GLM 39320, Mallory 9-61406, and Mercruiser Stern Drive 27-99777A1. Each Sierra product meets or exceeds the original equipment part it replaces. Fit specific, check part numbers to ensure proper fit.
Kevin Pier
September 4, 2025
Worked as it should
Brandon
August 21, 2025
they tell you not to use any other sealants with these gaskets because they have "grafton". Whatever that is. My head and manifold are all warped up and the paper gaskets were leaking like crazy. I know not the best idea for a boat, but money is tight this year. I remover the old manifold cleaned, painted and sanded the best i could. i put a SMALL bead of copper silicon around all of the surfaces and paired up the gasket to the head and bolted up. If you read the instructions on the silicon it tells you to only tighten the screws "finger tight" for one hour while the stuff sets up then crank them to spec... not a problem.First I ran it in the drive way for about ten minutes with no leaks. went out on the river, looking good brought it to full RPM for awhile, all good. I might be counting my chickens before they hatch but a few good runs and it looks great. I have a 1989 sea ray with a 1990 3.0 Merc in it.
Jerry GALLOWAY
August 7, 2025
Work great
dennis
August 6, 2025
Ty
george
July 28, 2025
Gasket material is brittle. Not what I expected but it fit good and seems to be working
Frydaddy
May 27, 2025
Work as they should.
Osnaldo Saez
May 20, 2025
Buen resultado muy satisfecho
Joshua Laraway
April 26, 2025
all was like oem
Gerard
April 22, 2025
Just as advertised fit perfect and durable
Dan Anderson
March 13, 2025
Awesome. Worked great
Tom saunders
February 10, 2025
Great
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