Minimum thickness 25 mm (0.98 in.), max runout 0.10 mm (0.004 in), max
thickness variation .015 mm (.0006 in.)
You can turn them once. If you're going with the Carbotech, you need to turn them & do the whole bedding process. Meaning if you switch to Carbotech then you must stick with Carbotech. Can't change back and forth between brands.
Also before you drive the car hard make sure you get it up to temperature.
I have the Carbotech XP10's on my V8. Great pads even for street use. Also from my research it's very easy on the rotor. Even the brake dust is very easy to clean. The only complaint is the noise. And they don't last as long as stock pads.