Ceramic rotors have been an option for the 996 Line since about 2001 IIRC. They are incredible, but so is the price. You could adapt them to a boxster, it would be the same as adding Big Red's, only the cost is different...more if you can imagine that, lol. You also must be extremely careful around them when changing tires, one slip of the tire, and the rotor will shatter.
Here are some ceramic rotors on a 997S that I supercharged recently.
Got Brakes?
