BMW performance brakes w/Ferodo 2500 pads and Motul fluid. At the last session I was trying to hold off a race prepped e30 for like five laps and finally locked my brakes up under threshold braking and something broke. Pulled off the track and heard severe grinding noise from both front and right rear wheels. I had to have the car towed back home, but I haven't had a chance to look at it yet today so who knows what I messed up.
Maybe it's just the push I need to get the BBK, but that's like 4k. Ouch!