I have used Hawk (60, 70), Ferodo, EBC and Mintex pads I have found the Mintex pads work best. I have also filed the edges down on new pads on the leading edges to reduce the chunking. You also may want to get some brake paint to verify the brake temperatures are appropriate for your pads. If you get serious into tracking, you should get some ducting in place to get more air to the rotors. Mitch