I bought this kit off of a board member a couple years back. The kit looks badass paired with the matching front kit and when you step on the brakes it wants to put you through the windshield.
I got super lucky and picked it up off of the guy for $550 brand new, unused. Deal (Steal) of the year!
Yes, the mounting bracket has two sets of holes. The inner set is for use with the stock sized GT (SRA) rotors and the outer set is for use the the larger rotors that come with the kit.