Abstract: The extension includes a support member including a mounting end mountable to a corn header adjacent to a rear end thereof for pivotable movement about a generally upwardly to downwardly extending pivotal axis between at least one forwardly extending position spaced above the end hood, and a second or stored position at angle to the forwardly extending position or positions. The support member has a free end extending upwardly and outwardly from the mounting end to a terminal end portion, and supports a sheet along substantially the length thereof to serve as a barrier to the passage of corn between the support member and the end hood and to deflect ears that strike it into an adjacent crop gathering channel. When it is not desired or required to use the extension it can be quickly and easily pivoted to the stored position, out of the way.