Exhaust Flapper Protector Valve for Mercury Boat (4") (Sierra 18-4457, 12644A1, 12644Q01)

Includes: - Exhaust Flapper Protector Valve

Fits Models: - Mercury Boats

Model Years: - Check fitment before purchase

Submodels: - Applies to listed models

Engine Options: - Compatible with standard engine options

Description: The Exhaust Flapper Protector Valve is designed specifically for Mercury boats, ensuring optimal performance and protection for your exhaust system. This component helps prevent water from entering the exhaust system, which can cause damage and reduce efficiency.

Features: - Durable construction for long-lasting use - Simple installation with compatible Mercury models - Built to fit 4" exhaust systems - Direct replacement for Sierra part numbers 18-4457, 12644A1, and 12644Q01 - Helps maintain engine performance by preventing backflow

Part Number: 18-4457, 12644A1, 12644Q01