Raises the height of the engines exhaust system to prevent water from entering the engine through the exhaust system. 2 inch (51 mm) riser height, hot dipped and top coated. Fits the following models: 2012 & newer MerCruiser Marine 8.2L Emissions Control engines with single catalyst exhaust manifolds (serial number 2A041665 and up) 2012 & newer MerCruiser Inboard 8.2L Emissions Control engines with single catalyst exhaust manifolds (serial number 2A041665 and up)