Well I have the earlier style on my FGT and have had them a little over 6 months, Im ready to put the factory ones on as they took better punishment then these. Emailed DBA about it, no response. I have issues forever with DBA discs, like I said I have punished the factory rotores with Ferodos in and they never once showed signs of giving up. I will say the DBAs with the Ferodos bit hard but the things just didnt have the life. I have to get them machined now. Wont be doing them again.