Powerstop makes them... or at least they did. These are slotted and drilled. I've had them on my X for the past 75 - 80K with no problems. I am also using Akebono Pro ACT ceramic pads. I honestly can't make any reliable claims about whether they are better or not, other than they aren't warped like my factory rotors were, and maybe they seem to shed water better. I also can't rememember where I got them for the life of me! I know I've posted it before, so do a search under member #1229 (me!!!) and maybe something will turn up. I'd do it, but I don't have the time or patience right now!