[ChevyThunder]

I run 15" rotors on the front of my 2,100 lb GT1 car with Brembo Endurance calipers. I can tell you that at Road America were you have three fast sections of track that you see over 150mph before heavy braking that the rotor size with proper cooling make a huge difference.. I was killing cars with 13" rotors and ABS . The only other thing I do is cryo my rotors . I use pagid orange race pads... for the street though , this would certainly be overkill... I also have a racing buddy who ran two piece Wilwood calipers and he switched calipers because he was having braking problems he believes to be due to flex in the caliper ... that being said I am going to run the Wilwood's on my Camaro because I beleive they will be plenty fine for the street and some hot laps at the road course. I won't be doing 30 min sprint races with the car