Mercury Mercruiser - 3" Riser Kit - Standard Cooling - Fits 2004-2016 MCM V-6 & V-8, Non-EC Engines - 864929A3Raises the height of the GM V 6 & V 8 small block (non Electronic Control) engines with dry joint exhaust system to prevent water from entering the engine through the exhaust system. Maximum height of 6 inches (152 mm). 3 inches (76 mm) for STANDARD COOLING and dry joint exhaust manifolds. Fits the following models: 2004 2016 MerCruiser Marine V 6 & V 8 (305, 350 & 377 cubic inch displacement) non Electronic Control engines (serial number 0W310000 and