I lost my brakes at the Runoffs and thought it was a master cylinder, not. Found a leaking caliper but that wasn't it either. The outer piston on both front calipers are rubbing the hats on the disks. It's not the caliper housing, I've already relieved that area. MGB calipers, Spitfire disks. I had to change to EBC-UPR 198 disk because I couldn't find any Brembos. Never had the problem with Brembos, but have been using the EBCs for a while without apparent issues. I had changed the calipers before Runoffs and installed new pads. Didn't have the problem initially, seems to have started as the pads wore. I just noticed there are 2 Spit disks #20815 for Mk 1 &2 and #20715 for Mk 3, IV and 1500. I think those may be original numbers. Can't find any differences in EBC disks available. Noticed EBC makes another disk #RK-198, anyone used them? Anyone else having this problem?