Mercruiser 3 in. Dry Joint Riser Extension Kit | Barr Marine MC-20-864929A3 Fuel Filter Kits These parts are essential because

These parts are essential because they deliver the electrical spark to each cylinder

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Mercruiser 3 in. Dry Joint Riser Extension Kit | Barr Marine MC-20-864929A3 Fuel Filter Kits These parts are essential becauseMounts between the manifold & elbow of Mercruiser marine engines with dry joint center rise exhaust manifolds to reduce the possiblity of water backflow into the engine through the exhaust. Mercruiser 3 in. Dry Joint Riser Extension Kit Barr Marine MC 20 864929A3 Barr Mercruiser 3 in. riser extension kit Helps to reduce the potential of water backing up into the engine through the exhaust piping Sold as a pair Includes mounting hardware and gaskets