my ZL1 felt like I was driving on ice with the factory goodyears at the autocross. I am going to try my drag radials next time because they have to be better.
'15 Z/28 #325 black a/c & stereo. 2:10.9 VIR Full 1:44.74 Summit Point Shenandoah Circuit
'12 ZL1 10.52@131 1.55 60' 2:13 VIR Full (sold)