So far just stock pads. Brakes did a great job at CMP and at VIR. They got a little squishy at VIR so am going to change the fluid to motul 600 as soon as I get some more info about bleed valves. All in all very satisfied with brake performance. The pads took a hit for sure though. Only about 1/4 inch of pad left after 3 HPDE days.