Well... you'll definitely have to replace your blinker fluid. Once you get above stock height, the viscosity breaks down. You'll have to use BF-01. Its not too expensive. You'll also need heavy duty tire beads if you want that "wheel stickin' out" look. If you don't want vibes with that much lift, you'll need the piston return spring. Also, you'll need their cross drilled break lines since stock lines are too short for that much lift.
You can get all these goodies here...
http://kalecoauto.com/index.php?main_page=index&cPath=3
Thats pretty much most of the mods you need. Also, you could fit 31s if you trim your fenders real good.