My last GT had cryo treated rotors and I noticed no difference in stopping power. That being said, I didn't race the car, but I was promised longer lasting pads and reduced rotor wear. I can say that wear was probably reduced considering after a year and a half on the car they showed very little wear. That car was sold and my latest GT sports 13" Wilwoods w/o cryo and I am completely impressed with these brakes. If you are trying to gain stopping power I wouldn't bother with cryo for it's to expensive for street use. If your looking for racing durability it might be worth it depending on how much your rotors cost. IMO Money is better spent on premium pads or bigger brakes.
