Drilled and Slotted

[LaunchHard]

I know this is an old thread but i figured id update. I just ordered a set of the Callahan drilled and slotted rotors and i plan on road coursing them next weekend at MAP's proving grounds. I did some research and did not find a single person that personally had issues with them, everyone "knew someone or heard about" them failing. I like to learn the hard way, so i will keep everyone posted with first hand results. If they do fail, i have every intention of getting them warrantied and wont road course them the next time as they do come with a 1 year warranty.