Watch it with DBA, had a little issue when buying slotted rotors off them! had the rotors delivered that they assured me were there replacement of R33 GTST S1, so i took them home and installed them -- simple install, took it for a drive, and nearly destroyed them! they had given me rotors that were too thick and the offset was incorrect! They also didn't want to take them back because of the damage!!! ended up having to get them machined to fit, losing the slots, only good thing is better ventilation, waste of $500 or so dollars..
just my little winge, partly my fault for trusting their info and not double checking! oh well ... rant complete