So I installed a Powerstop kit (rotors, pads, calipers....front and back) on my 2010 GT. Assembly of the front caliper pins/pads/spring was not obvious to me, so I looked high and low for an install sheet on their site but nada. Then I ran in to a conflict with the wheel clearance (my mistake) so I emailed their "tech support" looking for the caliper dimensions.....like every other brake manufacturer publishes...... and got a very terse reply that they don't have the dimensions. WTF? It seems like a nice kit, but if you decide to go this route, be advised you will be on your own.