The invention is related to a header (1) for a combine harvester, the header having a first cutter bar (6) for cutting crops at a first height so that the cut portions are gathered towards the central area of the header by an auger or draper mechanism, and wherein the header comprises a second cutter bar (10) configured to cut the remaining stalks of the crops at a second height lower than the first height. The header further comprises a means for displacing the second cutter bar with respect to the header body without separating it from the header body, the header body being defined as the group of components consisting of the header back wall (5), side walls (4) and floor portion (7). The displacement means is furthermore configured to store the second cutter bar in an inactive position. The header is operable with the first cutter bar as a single cutter bar, when the second cutter bar is in the stored position.
