Originally Posted by Hotrodz

All I am saying is on the street I found my track setup to be sufficient at 600 whp. The only thing different is 10XP up front. They squeal and dust but they work. I am changing my front rotors to Stoptech 2 piece because the Z1s are worn and I was getting significant shudder at my last track event. With all that people are experiencing with Z1 rotors at the track I decided I would do something different rather than rebuild my front rotors.