Replacement rotors for track use

[Larry Herman]

You did not say what you are doing with your Porsche, so based upon your current brake pad choice, I assume that you are doing some DEs.  The only problem with the OEM drilled rotors is that they are more susceptible to cracking.  That is the life-limiting factor for track use.  Properly made slotted rotors (ones with milled, radiused slots that do not go all the way to the edge) will last longer because they do not crack as easily.  Neither offer a braking advantage over plain rotors.