It seems the rotors are soft material and combined with pads either stock for HP+ they are failing. See the pictures in this thread. Remove the spaces from the link.

The older 350z never had rotor issues like this. Doh.

http://www.the 370 z.com/intake-exhaust/4328-full-stillen-bolt-setup-videos.html

First the Oil Cooler, now this.

 

I have a prediction...

 

here for the LULZ.
none the less i dont know if its the recording or what but it doesnt sound loud.

 

that sucks i was about to buy a 370z . but those thing can be fix

 

Down the road, aftermarket rotors will likely be available in the future like the 350Z time-wise.

I already have contacted a couple of brake manufacturing inquirying about two-piece/one-piece rotor replacements! It's a easy fix! I'll let eveyone know of there availability.

 

I've seen a few bad OE rotor results on various forums...
FWIW, Racing Brake has 2pc fronts on a signup pre-order on 'Driver