Just a quick note...
I also needed to adjust in a tad more negative camber with the two piece lower control arms in the rear to get the handling "spot on" with the PSS9s (at lowered ride height). Makes a BIG difference.
Highly recommend the aluminum crossbar that links the two rear suspension halves together at the bottom rear (bolts on below the aluminum "diamond" under the transmission. I got this from a local PCA guy that makes them. I was skeptical but it does make a difference (depending on how aggressive you drive).
