I have alot of track experiences with Porsches at the track. I ran PCA club racing from 2006-2011 first in a 930 and then in a 993 Cup at. obviously Porsches are much lighter but brembos and pagids usually did the trick in any model for track use. My dad did a few events at the glen in his b8 S4 running stock rear calipers with 8 piston brembos up front and experienced brake fade after 4 or so laps of hard driving And by the end of the event his brake pads were burned pretty badly. I think he was running "Carbontech" pads or something like that. I'm hoping the brake cooling mod along with being a bit lighter with pagids will do the trick. I decided on Pagid yellows.