Put some new rear brake pads on 07 GT500 today-had to run to Harbor Freight Tools and grab a caliper tool set for $40. Kit has several different adaptors and a chart that tells you all the calipers it works on(many foreign and domestic cars). I used the #6 adapter plate (it fits the slots on the face of the pistons). Makes it a snap to reseat these pistons in the caliper bore. I noted both left and right side rear calipers turn clockwise to reseat-there are two "screws" in the kit-the one marked "Right" works on both sides of the car (ie, clockwise turns them back in). Other one is marked "Left" and I didn't use that one for this car. Probably has left handed threads for ones that reseat by turning counter clockwise. Forget that little $6 eight sided cube sold as a "rear caliper tool". May work for some cars but not this one.