Quote Originally Posted by Crumpacker View Post
I've cracked some rotors in my day, but this one takes the cake:



Maybe it's just me, but are those images upside down? If not, you're calipers are installed wrong...the bleeder valve should be on TOP.

I've cracked rotors that badly before.....it's not so unusual. Given that you're using 4-piston calipers, and likely larger pads, you'll be putting more heat into the rotors.

Recheck your brake duct system. It may be time to move to a set of 2-piece rotors. The stock Cobra units are relatively thin compared to the heavier duty 2-piece units. I don't know if I'd jump right into a set of StopTech's, but definitely consider better rotors.