Originally Posted by Sh0velMan

I have front upper arms, I have stock arms in the rear. I run more camber than you would want to run on the street, most likely. Makes the tires wear weird.

The coilovers have almost nothing to do with alignment though. The need for aftermarket arms and whatnot is based purely on how low you want to go. The Stance units are capable of basically stock ride height (at least on my car, yours will be substantially heavier, so your mileage may vary), making the stock adjustments satisfactory (for now). I definitely sit a bit lower than stock, but I'm not slammed by any stretch.

So, in summary: It'll depend on how low you want to go as to whether or not you need aftermarket arms.