It seems to me that you are going way overboard when likely all you need is a pad upgrade.
I find it hard to believe that you are getting brake temps well over 1200*F on the street, and if so, certainly not safely.
BBK's are more about heat management than all out stopping power, you are also limited by tire/pavement traction on exactly how much of that extra brake torque translates to reduce stopping distance.
Sure AP kits are the absolute most bad-ass kits you can get, but unless you are on track a lot, and with some super sticky tires, they are for naught.
As for rear calipers, even for track use, the OEM rears are so underutilized I wouldn't bother.
I find it hard to believe that you are getting brake temps well over 1200*F on the street, and if so, certainly not safely.
BBK's are more about heat management than all out stopping power, you are also limited by tire/pavement traction on exactly how much of that extra brake torque translates to reduce stopping distance.
Sure AP kits are the absolute most bad-ass kits you can get, but unless you are on track a lot, and with some super sticky tires, they are for naught.
As for rear calipers, even for track use, the OEM rears are so underutilized I wouldn't bother.