Very confusing....if I'm not mistaken, our stock rotors (RS,GS) ar only 10" in diameter. Brembo brakes are more like 13" or so. Satan will tell you anything to try to make a buck. Maybe you are confusing the wheel size with the rotor size?? Also, I'm pretty sure you will never find larger calipers on the rear than on the front. Simple physics. I think the dude at Satan was born yesterday. Go with the Brembo rotor/caliper upgrade if you have $2500 lying around. That's one of my dreams. Good luck!