I daily drive on XP10/XP8's, but I am also on the tail of the dragon almost every saturday at a minimum. One thing I will say about them besides the typical crazy dust, is that the XP10's HATE cold weather (20-30's) for noise. They have incredible bite from air temperature and it only gets better as they get hotter. I have yet to have any issues out of them on the dragon or the few autocross events i've done. Im running Z1's two piece rotor in the front, and the OEM rotors in the rear.
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