Exhaust Flappers & Shutters
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Exhaust Flapper With Clamp - 5 & 6 in. | Sierra 18-4458SIERRA-18-4458Qty In Stock: 14Brand: SierraExhaust protector valve mounts on the outside of 5 in. & 6 in. exhaust tip to prevent backflow of water into the exhaust. Learn More
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Exhaust Flapper With Clamp - 3 in. | Sierra 18-4456SIERRA-18-4456Qty In Stock: 40Brand: SierraExhaust protector valve mounts on the outside of 3 in. exhaust tip to prevent backflow of water into the exhaust. Learn More
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Mercruiser Exhaust Water Shutter | Sierra 18-2732SIERRA-18-2732Qty In Stock: 1Brand: Sierra
Mercruiser exhaust water shutter. Sold individually - two required per engine.
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Mercruiser Exhaust Water Shutter | Sierra 18-2727SIERRA-18-2727Qty In Stock: 12Brand: SierraExhaust Water Shutter Learn More
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Mercruiser Exhaust Water Shutter | Sierra 18-2733SIERRA-18-2733Qty In Stock: 14Brand: Sierra
Mercruiser exhaust water shutter. Sold individually - two required per engine.
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Exhaust Flapper With Clamp - 4 in. | Sierra 18-4457SIERRA-18-4457Qty In Stock: 21Brand: SierraExhaust protector valve mounts on the outside of 4 in. exhaust tip to prevent backflow of water into the exhaust. Learn More