I'm going to replace stock arms to tighten the back of my car; I will also install the BMR cradle lockout kit.
Here is a question: why would I want to spend extra on adjustable arms? The car never sees a track, stock hight. Current camber appears to be close to zero (eyeballing it); rear tires wear exceptionally even (which is good, given the silly price of those PS4S 315's ).
I installed them because I slightly lowered the rear and didn't want any boot tears just to be on the safe side. I did not lower the front though just to keep the geometry I just want to level out the car