Figured it out. The FRPP rear discs are 11" with are the size of the SVT rotors. The rear ST rotors are 10".
FR '11 FF Moderators pick
Oct '11 ROTM
FR '12 Carlisle Nifty Fifty Award/Best in Boost/Best 08-11/Finest Five Pick
FR '13 Carlisle 1st Place Award 08-11 Focus