yeah I vote something is wrong with the install... I run similar tyres with the DS2500's and some RDA rotors on my GTSt, and I can do about 7-10 flying laps before I seem to get any brake issues (soft pedal) and my rotors certainly don't look like the pic posted... oh I still have the dust shields on too but I think Roy has just convinced me to ditch them... UAS do alloy brake air diversion ducts for GTR/GTSt's BTW, look just like the pic Giant posted