The ornamental design for a frontbumper for a four-wheeled vehicle, as shown and described.
FIG. 1 is a front right perspective view of a front bumper for a four-wheeled vehicle, with the surrounding structure of the four-wheeled vehicle shown by broken lines;
FIG. 2 is a right side view of the front bumper for a four-wheeled vehicle with the surrounding structure of the four-wheeled vehicle shown by broken lines;
FIG. 3 is a left side view of the front bumper for a four-wheeled vehicle with the surrounding structure of the four-wheeled vehicle shown by broken lines;
FIG. 4 is a front view of the front bumper for a four-wheeled vehicle with the surrounding structure of the four-wheeled vehicle shown by broken lines;
FIG. 5 is a top plan view of the front bumper for a four-wheeled vehicle with the surrounding structure of the four-wheeled vehicle shown by broken lines; and,
FIG. 6 is a bottom plan view of the front bumper for a four-wheeled vehicle with the surrounding structure of the four-wheeled vehicle shown by broken lines.
The broken lines shown are for illustration purposes only and form no part of the claimed design.