I assume it's rubbing on the outside?
That +32 on the wheels is going to make fitting a large tire tough. With a +45 on 18x9.5 PF01s I ran 295/30/18 Hoosier R6s on my STI.
Also I ran our custom Ohlins Track Package
with 600# rear springs, whereas you have 400# springs in your off the shelf setup.
How much rear camber are you running?