Home Forums Cars 자가정비 DIY와 툴 지름신과의 상관관계 자가정비 DIY와 툴 지름신과의 상관관계 Home Forums Forums Cars 자가정비 DIY와 툴 지름신과의 상관관계 EditDelete bk 104.***.175.62 2016-12-0201:08:17 you misunderstood one part. performance brakes always dissipates heat better. thats why they are thicker, bigger in diameter and mostly vented or slotted. so i think in your case the housing of the rotors were corroded inside.