Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si New Replacement exhaust flappers for Mercruiser part number 807166A2. Used on many Mercruiser drive V6 engines. The replacement part is made from high quality material and -tested by the manufacturer. Please check carefully the part numbers and compare pictures provided to insure proper fitment. Used on Mercruiser drive V6 engines with one piece exhaust manifolds, or that had the 1 piece manifolds these are wider and have a flat tip. If you have ever overheated these tend to damaged. Sometimes you will find pieces of in the exhaust when you remove for servicing. They help keep water from entering the engine through the exhaust. Size: .15.7 x 7.7 x 0.4 cm / 6.18 x 3.03 x 0.16 inch MPN: 807166A2 Compatible With: fit for Mercruiser V6 Colour:black Material:ABS Package Contents: 1 * Exhaust Flapper Water Shutter Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.