Not sure what you mean by big dip?
The tailgate piece is attached to the bedrug and secured to the gate by velcro, and there's some extra material there to tuck down into the gap between the bed and gate. My pic makes it look a little deeper of a gap than it really is, but the extra material is needed for flex when you open/close the gate.
One thing, you do have to remove or loosen the upper tailgate panel to install a cap (supplied) over the top edge of it to give the velcro enough of a lip to attach to. The panel itself has no lip at all and therefore not enough surface area for the velcro. Instructions are included, it was easy.