Quote Originally Posted by The Yousef
nope...as far as i know and drill/slotted rotor cannot be machined...and regular OE blank rotor can be.
thats not true. I have drilled and slotted stillen rotors on my G35 and they have been turned before.

Find out what the minimum thickness is for your car. You should be able to find this out by calling a shop that works on your make and model. If you have a micrometer, you can check the thickness of the rotors. If they are warped too bad, turning them will not cure the problem.