Yes, the rear kit does in fact use the stock calipers. It has a caliper fitment bracket to fit the larger rotors and saves some $$$. I REALLY like the Baer kit and will probably go with it. I've seen the GT500 takeoffs but they are usually selling for upwards of $1000+ so the Baer's don't seem that unreasonable. I've never seen a GT500 takeoff for anywhere near $500. That would be one hell of a deal.
I was looking at the granatelli dimpled/slotted rotors along with some goodridge lines and Hawk pads before getting distracted by the Baer kit:
http://www.granatellimotorsports.com...lay.php?gid=19