whats the point in dimples in the disks . holes ok
... The face grooves will slice the brake pad material allowing the pad to bite harder into the disk, therefore causing an increase in disk temperatures
holes ive been told can cause them to crack unless 8mm drill poked through
the holes very often "i had black diamond on my old s2 "
looked FOOKING PAIN to clean clogged up Eventually

more looks than more braking power