Feature: 1. Professional design provides superior performance. Made of marine grade stainless steel and rubber, which is corrosion resistant and has a long service life. 2. The OE number is 807166A1, fit for Mercruiser, can accurately locate and meet your needs. 3. Can replace the original damaged parts well, and gives better exhaust flapper performance for your outboard motor. 4. Fit for Mercruiser stern that drive V6 and V8 engines, has wide application, to better meet your needs. 5. They prevent water from entering the engine through the exhaust and prevent your engine wear out or break overtime. Specification: Item Type: Water Shutters Flapper Material: Marine Grade Stainless Steel + Rubber OE: 807166A1 Package List: 1 x Pair Water Shutters Flapper Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks! 3. These are not suitable for the V6 engine that comes with the integrated manifold (which use 807166, please note that there is only one digit difference on the part number and cannot be interchanged with those in this list).