Not sure about that one mate, however, a word of friendly advice. I bought some drilled discs from the guy on ebay. Mine are Delphi/Lockheed. Now, i dont think Delphi/Lockheed make drilled discs in this price range because they have AP racing for that. Im guessing that they were drilled and slotted post factory. I dont see its a problem if its done right, and it seems to have been done right. Heres the FRIENDLY ADVICE though. I have had mine for 3 months and i have warped the front two. Take care to break them in properly and patiently.