Exhaust Flapper Valve & Clamp Kit – Fits 5" & 6" OD Exhaust Pipes (Replaces Sierra 18-4458, GLM 89260, Mallory 9-44002) family-yamaha-f150jc removing any old gaskets and

removing any old gaskets and cleaning the mating surfaces thoroughly

confirm the OEM part number 19210-ZW9-A31 matches your original impeller

reduced noise and vibration Package Contents

This kit matches Sierra 18-3429

as well as aftermarket equivalents from Sierra Marine (18-3031)

Exhaust Flapper Valve & Clamp Kit – Fits 5" & 6" OD Exhaust Pipes (Replaces Sierra 18-4458, GLM 89260, Mallory 9-44002) family-yamaha-f150jc removing any old gaskets andExhaust Flapper Valve & Clamp Kit Fits 5" & 6" OD Exhaust Pipes This marine exhaust flapper valve kit is designed to prevent water from rushing in through exhaust thru hulls when your boat is stopping, moving at slow speeds, or backing up. It is a crucial component for protecting your engine from water ingestion and potential damage. This kit is suitable for a wide range of inboard and stern drive applications with 5 inch or 6 inch outside diameter