A method of making a light weight housing for a fluid conduit, which is received within the light weight housing, comprising: forming a first metallic foam core into a first pre-form, wherein the first pre-form has a first recessed pocket; forming a second metallic foam core into a second pre-form, wherein the second pre-form has a second recessed pocket, the first pre-form being configured to mate with the second pre-form, wherein the first and second metallic foam cores (48; 50) are formed into the first and second pre-forms by a machining process selected from the group comprising: milling; grinding; electrical discharge machining; water-jet machining; and laser machining, wherein the pre-forms are slightly smaller than the final dimensions of the light weight housing; characterised by: inserting the fluid conduit into the first metallic foam core after it has been formed into the first pre-form, wherein the internal component is received within the first recessed pocket and the second recessed pocket; placing the second pre-form adjacent to the first pre-form in order to secure the fluid conduit between the first pre-form and the second pre-form; and applying an external metallic shell to an exterior surface of the first pre-form and the second pre-form after placing the first pre-form adjacent to the second pre-form, wherein the external metallic shell is deposited on the exterior surface of the first pre-form and the second pre-form via an application process selected from the group comprising: flame spray application process; plasma spray application process; cold-spray application process; electron beam physical vapor deposition (EB/PVD); chemical vapor deposition; and electroplating application process, and wherein the external metallic shell is deposited upon the entire exterior surface of the pre-forms. forming a first metallic foam core into a first pre-form, wherein the first pre-form has a first recessed pocket; forming a second metallic foam core into a second pre-form, wherein the second pre-form has a second recessed pocket, the first pre-form being configured to mate with the second pre-form, wherein the first and second metallic foam cores (48; 50) are formed into the first and second pre-forms by a machining process selected from the group comprising: milling; grinding; electrical discharge machining; water-jet machining; and laser machining, wherein the pre-forms are slightly smaller than the final dimensions of the light weight housing; characterised by: inserting the fluid conduit into the first metallic foam core after it has been formed into the first pre-form, wherein the internal component is received within the first recessed pocket and the second recessed pocket; placing the second pre-form adjacent to the first pre-form in order to secure the fluid conduit between the first pre-form and the second pre-form; and applying an external metallic shell to an exterior surface of the first pre-form and the second pre-form after placing the first pre-form adjacent to the second pre-form, wherein the external metallic shell is deposited on the exterior surface of the first pre-form and the second pre-form via an application process selected from the group comprising: flame spray application process; plasma spray application process; cold-spray application process; electron beam physical vapor deposition (EB/PVD); chemical vapor deposition; and electroplating application process, and wherein the external metallic shell is deposited upon the entire exterior surface of the pre-forms. inserting the fluid conduit into the first metallic foam core after it has been formed into the first pre-form, wherein the internal component is received within the first recessed pocket and the second recessed pocket; placing the second pre-form adjacent to the first pre-form in order to secure the fluid conduit between the first pre-form and the second pre-form; and applying an external metallic shell to an exterior surface of the first pre-form and the second pre-form after placing the first pre-form adjacent to the second pre-form, wherein the external metallic shell is deposited on the exterior surface of the first pre-form and the second pre-form via an application process selected from the group comprising: flame spray application process; plasma spray application process; cold-spray application process; electron beam physical vapor deposition (EB/PVD); chemical vapor deposition; and electroplating application process, and wherein the external metallic shell is deposited upon the entire exterior surface of the pre-forms.