Automotive Parts and Accessories: Mercruiser Exhaust Flapper (Water Shutter) / GLM Part Number: 89170; Sierra Part Number: 18-2732; Mercury Part Number: 807166A3 - GLM

Sports: Water Shutter Replaces Mercruiser 807166A1 Pair (Set of 2) - StayCoolPumps

Automotive Parts and Accessories: Mercruiser 3" Exhaust flapper / GLM Part Number: 89160; Sierra Part Number: 18-2733; Mercury Part Number: 99370A2 - GLM

Sports: Water Shutter Replaces Mercruiser 807166A1 - StayCoolPumps

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