not for street use, but if you try to road course with your stockers, they will fade with the quickness. Did you make sure to bed them in properly?
Thomas they suck balls trust me. HPS pads are suppose to be street pads also so I dout they would be the greatiest for track use either.
I've become a PBR twin piston brake caliper changing expert because of these pads, and yes they were broken in correctly twice, as I resurfaced them once. They also have probably 1/8 inch of two different types of anti-squeal on them.
Motorcraft pads > Hawk HPS pads.