My OEM disks cracked around the holes after two track days and since then I've been using Brembo HC. I'm very happy with the braking performance but less happy about their tendency to warp. (Now when I say warp I do not mean literally warping the disc. I mean juddering under hard breaking for what might be a variety of reasons. Swapping the discs cures it. I am extremely careful with the bedding in procedure and cooling down lap. Even If I come off for a red flag I keep the car moving slowly for a few minutes.) I don't want to go back to OEM drilled but there's an OEM plain that appears to be for ph1 225 non-cup models. Any reason they won't work? Any other options?