F250. F350. F450. F550. A kit containing a Engine Coolant Thermostat and additional parts for installation. A Pipe that balances Coolant between cylinder banks. Engine Coolant Bypass Pipe. Engine Coolant Housing where a Thermostat is used but not included. Engine Cooling. Includes: Thermostat, Gaskets And Coolant Temp Sensor. Bypass. Housing. Water BY Passenger. Crossover. Water manifold. Water Neck.