Rear LCA Question
 

I lowered my car around 2 inches on BC Extreme Low Coilovers. Can I keep the stock rear LCA in and get an alignment for just the toe? Or do i have to buy after market LCA?

It depends on if you're happy with the camber you have from lowering the car. If it's horribly uneven, or if you want more or less than you have, you'll need LCAs in order to adjust it.

Ok thank you and without the rear lca the toe can stil be adjusted right?

Yes, toe is adjusted separately with its own arm.

If you're on BC Extreme Lows and you decide you need LCAs, you may want to look into Stance, PBM, or similar that incorporates a lowered geometry. That will allow you to maintain the height you want while giving you a little more travel in your suspension.