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What is the Sierra 18-1908K Manifold Riser Spacer Kit used for?
The Sierra 18-1908K Manifold Riser Spacer Kit is a 3-inch riser kit for MCM V-6 carbureted and TBI engines with two-piece exhaust manifolds. It is packaged as a set with mounting hardware and is specified for engines with serial numbers 0M614999 and below.
Which MerCruiser engines does the Sierra 18-1908K fit?
The Sierra 18-1908K fits MCM V-6 carbureted and TBI engines equipped with two-piece exhaust manifolds and serial numbers 0M614999 and below. Verify your engine type and serial number before purchasing to confirm the kit matches the listed application.
What is included in the Sierra 18-1908K Manifold Riser Spacer Kit?
The kit includes one 18-1908 Manifold Riser Spacer, pipe plugs 18-4258 and 18-4263, and exhaust elbow gaskets 18-2849-1, 18-0897, and 18-0672. The kit is packaged as a set and includes mounting hardware.
What manifolds and mounting kits can be used with the Sierra 18-1908K?
The Sierra 18-1908K is specified for use with manifold 18-1952-1, exhaust elbow mounting kits 18-8554 and 18-8555, and manifolds 18-1953-2 and 18-1957-1. Verify the applicable manifold and mounting kit numbers before using this riser spacer kit.
What parts does the Sierra 18-1908K replace?
The Sierra 18-1908K replaces GLM 50310 and is listed as interchangeable with MerCruiser Stern Drive part numbers 93320A6, 93320A2, 93320A3, 807476A6, 93320A5, and 93320A13. Comparing your existing part number with these numbers can help verify compatibility.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Sierra 18-1908 MerCruiser V6/V8 3" Manifold Riser Spacer Size: 3" For: MerCruiser GM V6 229 and 262cu.in. (Models: 185 and 205) GM Small Block V8 305-350cu.in. (Models: 200, 228, 230, 260 and...
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Sierra 18-1927 Riser Sierra high-quality 4" Riser. For use on Crusader Inboard Engines, fits GM Big Block V8 454 cu. in. Models Ch350 & 454XL For use on Crusader Inboard Engines, fits GM Small...
