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, suitable for Mercruiser, can accurately locate and meet your needs. 3. Can replace the original damaged parts well and provide better performance for the exhaust flap of your outboard motor. 4. Suitable for Mercruiser sterndrives running V6 and V8 engines, has a wide application to better meet your needs. 5. They prevent water from entering the engine through the exhaust pipe and prevent the engine from wearing out or breaking down over time. Specification: Product Type: Water Shutter Flap. Material: Marine Grade Stainless Steel + Rubber OE: 807166A1 Packing List: 1 x Pair of Water Shutter Flaps Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure about the item, please contact us before buying to avoid unnecessary returns, thanks! 3. These are not suitable for the V6 engine that comes with integrated manifold (which uses 807166A2, please note that it is only one digit in the difference in part number and cannot be interchanged with those in this listing).