The present invention provides a device for reinforcing the rear end of a vehicle having a ladder-type frame. The device includes a first bar that is adapted to be secured between the left side rail and right suspension attachment of the vehicle frame and a second bar adapted to be secured between the right side rail and left suspension attachment such that the first and second bars are mounted to the frame in a crosswise fashion with respect to each other between the side rails. The device is mounted adjacent the rear of the vehicle frame whereby torsional stiffness and rigidity can be added to the rear of the frame and lateral deflection of the suspension attachments that occurs during aggressive driving is sharply minimized.