Methods of forming hollow extruded vehicle frame component for subassembly attachment

A frame component of a vehicle, such as a header beam that couples between the A-pillars of a vehicle frame, includes an extruded hollow member having top and bottom exterior walls and side walls that together enclose an elongated internal volume of the hollow member. A pair of interior walls extends along the internal volume separating outer load sections adjacent to the side walls from a central attachment section. The outer load sections are void of apertures for supporting continuous load paths. A formation on the bottom exterior wall protrudes into the internal volume in the central attachment section. The formation includes an inset surface angled, located, and otherwise configured for attaching a subassembly to the frame component.