BBB A+ Accredited Business
Description
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 system. This valve is made with weather-resistant EPDM with U/V stabilizer. Includes a stainless steel clamp.
Size: 4"
Interchangeable with:
- GLM
- 89250
- Mallory
- 9-44001
- Mercruiser Stern Drive
- 12644Q01
- 12644A1
California Residents: 
WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.