2.5 LITER TURBO. A seal that prevents oil from leaking out, or contaminants from enteRing the Engine Coolant Inlet Housing. Bypass Pipe. Heater Inlet Pipe. O-Ring. Oil Cooler Pipe. Pipe To Thermostat Housing. Thermostat Housing Gasket. Inlet Flange O -. Thermostat Housing Gasket. Connector o -. Water Inlet tube o -. Water Neck Gasket. Included with: Connector Pipe, Water Inlet tube, Water Pipe.