Track advice

good luck and let us know how you do
I've been able to run 12.87 at 111 in my 02 Z28 M6 with a lid/filter/Flowmaster catback on regular Goodyear RSAs. The weather was in the low 60s that day so that helped. But to get the most out of your car you need to power shift and it helps having an aftermarket shifter. Power shifting is worth 1-2 tenths and 1-2 mph.
Good luck.

