disclosed apparatus and method to extrude a honeycomb , providing correction in bowing of the extruded honeycomb structure , employs a deflector device having a base plate including an opening aligned in a direction parallel to the extrusion axis through which the plastic material is conveyed to the die . the deflector device includes a bow plate movably mounted to the downstream or upstream side of the base plate . the bow plate includes a constant area aperture . the deflector device positioned upstream of extrusion die imparts a degree of bow reduction by the position of the constant area aperture over the opening imparting a pressure drop gradient on the flow stream entering the die .