3-1/2" to 4" I.D. External Salisbury Flapper 

3-1/2" to 4" I.D. External Salisbury Flapper

These are excellent American-made flaps that will not curl like cheap import copies. These are a must for boats with a very close distance between exhaust ports and the water line Clamp is included. This flap has a 4" ID and must be cut down for 3-1/2" applications. Replaces GLM 89250, Mallory 9-44001, Mercruiser 12644A1,12644Q01 and Sierra 18-4457. Sold each.