Some engine models will require a closed cooling kit, a belt kit, and a seawater pump kit. Other models will not require all these kits. A note indicates that there might be a different kit that is required to make the kits fit the engine on which the closed colling is being installed. Front mounted kit 8M0051178. Full closed system, which also protects the dry joint exhaust manifolds from corrosion. Fits 2011-2016 MerCruiser Marine 4.3L Multi-Port Fuel Injection Emissions Control engines.