A kit for installing an aftertreatment system package, the kit comprising: a first aftertreatment component (112, 202) having a first cross-sectional shape, a second aftertreatment component (114, 204) having a second cross-sectional shape, and a third aftertreatment component (110, 206) having a third cross-sectional shape; a first bracket comprising a first mounting interface, the first bracket defining a first set of aftertreatment engagement features (1002, 1004, 1006) comprising at least a portion of each of the first cross-sectional shape, the second cross-sectional shape, and the third cross-sectional shape; a second bracket comprising a second mounting interface, the second bracket defining a second set of aftertreatment engagement features (1102, 1104, 1106) comprising at least a portion of each of the first cross-sectional shape, the second cross-sectional shape, and the third cross-sectional shape; and wherein the first bracket and second bracket are structured such that, when the first mounting interface is mounted on a first mounting surface and the second mounting interface is mounted on a second mounting surface, the cross-sectional shapes of the first bracket align with the cross-sectional shapes of the second bracket; characterized in that the first bracket defines a first cross-sectional shape sized so as to allow passage of the first aftertreatment component (112, 202) therethrough, a second cross-sectional shape sized so as to allow passage of the second aftertreatment component (114, 204) therethrough and a third cross-sectional shape sized so as to allow passage of the third aftertreatment component (110, 206) therethrough such that the first bracket encircles each of the first aftertreatment component (112, 202), the second aftertreatment component (114, 204) and the third aftertreatment component (110, 206); and wherein the second bracket defines a first cross-sectional shape, sized so as to allow passage of the first aftertreatment component (112, 202) therethrough, a second cross-sectional shape, sized so as to allow passage of the second aftertreatment component (114, 204) therethrough and a third cross-sectional shape, sized so as to allow passage of the third aftertreatment component (110, 206) therethrough such that the second bracket encircles each of the first aftertreatment component (112, 202), the second aftertreatment component (114, 204) and the third aftertreatment component (110, 206). a first aftertreatment component (112, 202) having a first cross-sectional shape, a second aftertreatment component (114, 204) having a second cross-sectional shape, and a third aftertreatment component (110, 206) having a third cross-sectional shape; a first bracket comprising a first mounting interface, the first bracket defining a first set of aftertreatment engagement features (1002, 1004, 1006) comprising at least a portion of each of the first cross-sectional shape, the second cross-sectional shape, and the third cross-sectional shape; a second bracket comprising a second mounting interface, the second bracket defining a second set of aftertreatment engagement features (1102, 1104, 1106) comprising at least a portion of each of the first cross-sectional shape, the second cross-sectional shape, and the third cross-sectional shape; and wherein the first bracket and second bracket are structured such that, when the first mounting interface is mounted on a first mounting surface and the second mounting interface is mounted on a second mounting surface, the cross-sectional shapes of the first bracket align with the cross-sectional shapes of the second bracket; characterized in that the first bracket defines a first cross-sectional shape sized so as to allow passage of the first aftertreatment component (112, 202) therethrough, a second cross-sectional shape sized so as to allow passage of the second aftertreatment component (114, 204) therethrough and a third cross-sectional shape sized so as to allow passage of the third aftertreatment component (110, 206) therethrough such that the first bracket encircles each of the first aftertreatment component (112, 202), the second aftertreatment component (114, 204) and the third aftertreatment component (110, 206); and wherein the second bracket defines a first cross-sectional shape, sized so as to allow passage of the first aftertreatment component (112, 202) therethrough, a second cross-sectional shape, sized so as to allow passage of the second aftertreatment component (114, 204) therethrough and a third cross-sectional shape, sized so as to allow passage of the third aftertreatment component (110, 206) therethrough such that the second bracket encircles each of the first aftertreatment component (112, 202), the second aftertreatment component (114, 204) and the third aftertreatment component (110, 206).