Did you break them in correctly? I installed ceramic on my mother in laws can an it said to do 20 stops from 30 mph easy breaking with 30 sec rest in between , not fast or emergency stops..
2004 F150 4x4 Lariat Supercrew, 5.4l, Black/Arizona Beige (daily driver)
2002 Mustang GT Convertible, triple black, mach 1000 system (Summer Car)
2001 Ranger Edge 4x4 xcab (sold to cousin)
4.10 Gear/RPM thread