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 8M0123588 Full closed system which also protects the dry joint exhaust manifolds from corrosion. Fits the following models: 2016 & newer MerCruiser Marine 6.2L Bravo (serial number 2A530776) TowSport 6.2L (serial number 2A530774 & up) Note: If installing on 6.2L TowSport V-drive models with the exhaust elbow outlets pointing to the front of the engine, this kit can only be used on Digital Throttle & Shift models only.