The rear bumper irons need modifying as well.
I've got a split rear bumper and early bay bumper irons, the split bumper sat at a steep angle, leant on the VS exhaust and was too far away from the corners for my liking (you could've lost a small child in the gap between bumper and rear corner).
So I cut the ends off the bumper irons and re-fitted them so that the split bumper sat level, rather than with the ends pointing towards the road.