
Sierra 18-4457 Mercruiser Exhaust Protector Valve - Replaces 12644A1 The Sierra 18-4457 Exhaust protector valve is a compounded rubber flapper valve that prevents water from entering the exhaust...
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Add to CartSierra 18-4458 Universal 5" Exhaust Protector Valve
Sierra high-quality engine parts are designed to meet OEM specifications. Fits both 5" & 6" Exhaust and includes stainless steel clamp.
Replaces:
California Residents:
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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