A honeycomb extrusion apparatus comprising: a die body including an array of pins that are spaced apart to define an extrusion face with a honeycomb network of discharge slots extending along an extrusion axis of the die body, the die body further including an outer peripheral surface facing away from the extrusion axis and circumscribing the extrusion face, and an outer feed surface circumscribing the outer peripheral surface; a mask including an inner peripheral surface at least partially circumscribing the outer peripheral surface of the die body, wherein a peripheral gap is defined between the inner peripheral surface and the outer peripheral surface; a circumferential feed area in fluid communication with the peripheral gap and partially defined by the outer feed surface of the die body; a first vane including a first face portion, wherein a first axial width of the circumferential feed area is defined between the first face portion and the outer feed surface of the die body, wherein the first vane is adjustably mounted with respect to the mask to selectively adjust the first axial width; and characterized by a second vane including a second face portion spaced radially inward with respect to the first face portion in a radial direction extending perpendicular to the extrusion axis and toward the extrusion axis, wherein a second axial width of the circumferential feed area is defined between the second face portion and the outer feed surface of the die body with the second axial width being different from the first axial width, and wherein the second vane is adjustably mounted with respect to the mask to selectively adjust the second axial width. a die body including an array of pins that are spaced apart to define an extrusion face with a honeycomb network of discharge slots extending along an extrusion axis of the die body, the die body further including an outer peripheral surface facing away from the extrusion axis and circumscribing the extrusion face, and an outer feed surface circumscribing the outer peripheral surface; a mask including an inner peripheral surface at least partially circumscribing the outer peripheral surface of the die body, wherein a peripheral gap is defined between the inner peripheral surface and the outer peripheral surface; a circumferential feed area in fluid communication with the peripheral gap and partially defined by the outer feed surface of the die body; a first vane including a first face portion, wherein a first axial width of the circumferential feed area is defined between the first face portion and the outer feed surface of the die body, wherein the first vane is adjustably mounted with respect to the mask to selectively adjust the first axial width; and a second vane including a second face portion spaced radially inward with respect to the first face portion in a radial direction extending perpendicular to the extrusion axis and toward the extrusion axis, wherein a second axial width of the circumferential feed area is defined between the second face portion and the outer feed surface of the die body with the second axial width being different from the first axial width, and wherein the second vane is adjustably mounted with respect to the mask to selectively adjust the second axial width.