Grand prix racewear you want z4 pads,i've had virtually everything !,but the brembo z4's,are the best,trust me,thay ain't cheap,but they do work,the best,on initial bite,and feel,i've had ferodo,performance friction etc,stick with these,they won't wear your discs,and they don't last bad either !,what are you doing with thhe bike,trackdays ?