A hub for a fluid-flow control system of a vehicle can include an interface surface configured to be positioned adjacent to a corresponding interface surface of the fluid-flow control system. The interface surface can have at least two openings positioned to align with at least two corresponding openings in the corresponding interface surface of the fluid-flow control system and through which mounting components are receivable for coupling the hub to the fluid-flow control system. The hub can also include a raised surface protruding from the interface surface and having a diameter that is smaller than another diameter of the interface surface. The raised surface can have a profile with at least two keys configured to be received in corresponding keyholes of the corresponding interface surface of the fluid-flow control system.