The most interesting part of my conversation with Brembo was that they said most people dont even know they are buying Modified Brembos. My case was easy. They dont make cross drilled AND slotted. But there are people who buy Brembo blanks and modify then sell them as original Brembos. Or they just sell knockoffs in Brembo boxes. I bought my old GS front and rear Brembo rotors from ARD and they probably arent even Brembos even though they came in a Brembo box.