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Marine Water Necks

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Sierra Marine Thermostat Housings 18-1989

Marine Water Necks, Thermostat Housing, 90-degree, Multi-port, Stainless Steel, Polished, with Spacers, Gasket, Pipe Plugs, Mallory, Mercruiser, Kit

Part Number: RRA-18-1989

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Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today