Oh, sorry, yea there seems to be some confusion on those ducts. They are reported in many places as rear brake cooling, but SRT has posted it as a diff cooling ducting, I asked Ralph and he said it's to cool the diff, that the rear brakes don't see temps needing cooling. Ref: "A performance car’s differential works hard and gets pretty hot – almost hotter than any other part – so we designed an air path for cooling. The ducts also modernise and lengthen the canopy of the vehicle." But then we have a new question, what about diff cooling on the vert, hmmm. Although Ralph did say the design wasn't final, it was in-process.