Well said AirKnight, I agree completely.
Furthermore, the cross drilled rotors may actually have greater stopping power because of the additional surface of the edge of the holes (think of a cheese grater). This is the reason that pads will wear faster on them. Also, poorly designed systems will be more fragile than a non-drilled rotor in terms of cracking, and the rotor itself will wear out faster due to less surface area. Heat dispursion will be better in extreme cases -ie in racing, or if you live in the mountains, etc where brake fade is an issue. For the most part though, the minimal benifits of drilled rotors won't be worth the cost and additional wear and tear/durability *on a street car*. If you're that concerned with cooling, brake ducting/ ventilation would be a better investment. -just my $0.02
