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Description
Sierra 18-1977-1 Mercruiser Thermostat Housing
Sierra high-quality engine parts are designed to meet OEM specifications.
- Fits MCM/MIE GM V-6 & V-8 (305 & 350 cid) engines & Hi-Perf 454, 502 & 540 cid engines.
Interchangeable with:
- Barr
- MC2947441
- GLM
- 13220
- Mallory
- 9-42503
- 9-42506
- Mercruiser Stern Drive
- 47441A1
- 47441
- Osco
- MC55-TSB
California Residents: 
WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov
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