Ran an autocross and top speed event yesterday. The Falken 615+ tires did pretty good. The event is run what you brung. I usually run 10-12 seconds behind the fastest cars. I cut that down to 4.5 seconds. So two weeks of wrenching and a couple of years gathering parts paid off. We had alot of rain in the morning so we did some wet runs until things dried out. Only got in four runs and two top speed runs.