4.0 LITER. Inlet hose o-ring. A round Ring used to seal between the Heater Hose and it's mounting surface. A round Ring used to seal between the Radiator Hose and it's mounting surface. All Required. Engine Coolant Pipe Seal. O-Ring. Part cannot be reused/reinstalled. Connector seal. Elbow seal. Engine Coolant Pipe Seal. HVAC Heater O -. Inlet tube o -. Outlet o -. Radiator Coolant O -. Return tube o -. Water Pipe o -. Included with: Connector Hose Part cannot be reused/reinstalled, Elbow, Inlet Hose, Inlet Hose Part cannot be reused/reinstalled, Outlet Hose, Rear Hose, Return Hose Part cannot be reused/reinstalled, Water Hose, Water Hose Part cannot be reused/reinstalled.