FIG. 1 is a perspective View of the door header showing a new ornamental design thereof;
FIG. 2 is a front elevation of the door header shown in FIG. 1;
FIG. 3 is a rear elevation of the door header shown in FIG. 1;
FIG. 4 is a left side of the door header shown in FIG. 1;
FIG. 5 is a right side elevation of the door header shown in FIG. 1;
FIG. 6 is a top plain view of the door header shown in FIG. 1; and,
FIG. 7 is a bottom plain view of the door header shown in FIG. 1.
The broken lines are for illustrative purposes only and form no part of the claimed design.