Originally Posted by Gary_C

Based on the quality and durability of the Brembo discs you can pretty much go either way. (I know, this doesn't answer your question at all...keep reading)

We generally recommend slotted discs for anyone who will be tracking their car. The slots on the disc will refresh the pad surface for better initial bite, and will also allow the disc to maintain more consistent operating temperatures which increase disc life during consistent lapping.

A drilled disc will be about an additional 1/2 pound lighter, and will offer a slight advantage towards cooling. This is a major benefit on the street, but can increase the intensity of the heat cycles during tracking.

You really need to decide where you want the most benefit.

With a drilled disc at the track you will want to limit your pad options and not run anything with to great of a coefficient of friction. With a slotted disc on the street you will wear through pads a bit sooner (maybe 10% less life, nothing too horrible) and create more brake dust for your wheels.

If your goal one day is to be able to run "R" compound tires, and consistently focus on reducing your lap times and be competitive with other cars in your run group then you'll want to choose slotted discs. If you will be doing HPDE's to become more comfortable with your cars capabilities, have fun, and drive to and from the track with the same vehicle setup, drilled rotors and a mid grade pad will be the perfect option. I can work with you on pad compounds to suit the brake kit you decide to go with, and match your intended driving style and use.