I've had an itch to put this on the car and snap a few pics.
You can get a pretty good idea how this fits in the wake in this picture from the back.
On the right side you can see just a few pixels of the bumper and tail lights poking out, so I matched the tangent coming off the car fairly well... Except that the corners (top and bottom) are going to poke out of the wake a little. Fortunately they will be rounded.