Yes it is adjustable, it has 3 positions at the back and 3 at the front for diffrent angles of attack.
It is actually a super car wing off a Commodore and yes it's not just for show i actually want down force from it.
I also have an rear diffuser for under neath the rear end, the front also has a splitter that is pretty large to try and keep the front down, it will also have canards for front guards.