Depends on which calipers you're running. If it's the basic ones, scrap them and replace with either Akebono or R34 bits. Akebonos are about $2k though.
Also take a look at what rotors and pads you're running. The right mix will help but if the size isn't right, you'll still get heaps of brake fade. I am the master of brake fade!
RDA slotted and dimpled combined with QFM or EBC pads should give you a good go.