FWIW, I had my car at Firebird West track last year for 3 solid days. When I was not in it someone else was. A bunch of us brought my GT, a Noble, Viper, ZO6, Roush stang, F40, F50, an Enzo and Porsche Carrara. We ran them pretty hard, more than one had no rotors at end of day 2 but I never had...