If you want to know why that happened, the Black series are only rated for Street use, if you look at the co-efficiency (μ=0.48~0.32) and temp rating (500℃) you can easily tell it won't even last you a few laps of all out track or spirited driving (depending of course how good a driver you are too cause the better you are obviously use less brakes but you can't defy physics). If you want TRD pads that are good for both street and spirited driving then look at the TRD Red series which has higher temp rating BUT the co-efficiency is higher so it'll wear out both itself and your rotors quicker ;) yeah never touched the track, failed in the back streets lolll... i dont want red cause the fact u said wear's out rotors quicker... whats a pad that isnt really dusty, good on the rotors... and high temp...?