Yes very flush. I like it on there alot. There was a little bit of a fittment issue due to the different rear deck on the vert but it got worked out. Not perfect but Im not pointing out the flaw.
As for mounting there are 2 bolt/screw holes in this area on each side, (when I took it off my old 2+2) rest is that 2 sided sticky crap. Fairly easy. Bottom of wing that touches the deck is actually hollow so there is nothing to attach to the stock mounting holes.