hmmm interesting about the slotted rotors, I've never been able to tell the difference between using slotted and non-slotted rotors, thats only on the street though.....I'm gonna go do me some research now
*edit...my mistake * If you ask around you will find most of the guys that do alot of track work use RDA rotors because they don't crack as much as the DBA ones, I wouldn't really say they are that bad although I speak only from experience using them on my commodore, The crossdrilled DBA ones I have on the skyline developed hairline cracks around all the holes after only a few thousand k's of street use....