Thanks for the info man. That's the same setup I am going to run on my GT350 but I'm having a helluva time finding rubber anywhere. Was going to check on Goodyear SC3's next so this was good to hear.I just got my first track day on the Goodyear SC3 on my 2011 GT and I really like them. I have 305/30/19 square but at least on my 19x11 rims they are closer to a 315 in reality. Old tires were RE71. Subjectively they feel very similar to the RE71 to me, which is a good thing. I seem to be a couple seconds quicker on the GY on our local track, went from consistent 1.53s to consistent 1.51s. But tons of variables of course including especially the driver so don't read too much into that. If they hold up okay, I think these are a great do everything HPDE type tire.