Slots are there to remove brake debris and gases from the pads hitting the rotor. A quality slotted rotor should be better than a OEM rotor. For a street car hitting 3 laps of a circuit... Doubt 90% of us would notice the difference of a rotor compared to pad compound, fluids etc.

A quality rotor should also have heat markings on them, but no one ever looks at them either.

__________________
[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]