A tilting crop stalk chopper on a header for harvesting crops. The chopper is moveably coupled to the header such that the chopper moves between first and second positions to vary the angle at which crops are cut. The movement of the chopper into first and second positions is independent of the position of the row units of the header relative the ground. In one embodiment, a gear box coupled to the chopper is moveable to the chopper between the first and second positions.
