For Toyota CROWN GRS180 GRS182 GRS183 GRS184 12/2003-2008 2.5L 3.0L. The core of the radiator is welded in vacuum brazing furnace, no epoxy.The Radiator are 100% welded by TIG.Stronger & Higher Capacity for Coolant than OEM units,Made of High Quality Full AA5052 Aluminum Construction.aluminum radiator is designed to provide maximum cooling efficiency to prevent premature engine failure.