okay. fine. i learned my lesson from stillen. i even complained to steve millen, that bloody brit. he didn't care, all he said return the products and talk to someone else.
well, for x-drilled rotors, there might be a chance for cracking, under EXTREME heat and driving conditions. i don't race!
for cooling, i have spoken to (mainly porsche people, cause my brother-in-law is a porsche freak!) and said x-drilled is more for agressive driving, and slotted is for street driving. both will disipate a certain amount of excess hear. metalic, ceremic coated, and carbon-metalic pads act better under higher temps then our semi-metlc stock pads. the holes/slots are to clean the pad, plus release the trapped gases between the pad and the rotor.
well, there is something to it, but we will never find out in our sentra's...soon!