Elantra GT. Engine Coolant Outlet Gasket. Engine Coolant Outlet O-Ring. HVAC Heater Control Valve Gasket. HVAC Heater Control Valve O-Ring. seal. Engine Coolant O -. Housing. HVAC Heater O -. Ler o -. Temperature o -. Water o -. Included with: Control assembly, Control assy, Control Valve, Controller, Outlet assembly, Outlet assy, Temp Control, Water Outlet.