I've been using the Porterfield Carbon Kevlar R4S pads for road racing and street. Very nice pad, rotor friendly and low dust.
R-4 Carbon Kevlar
Ten years old and still an outstanding race pad, the original R-4 Carbon Kevlar has proven to be versatile and a superior performing product. We have added two new compounds to compliment the R-4.
R-4 S: Street High-performance & Limited Competition
The high performance street pad of choice. Very high friction level even at cold temperatures.
R-4 E: Endurance Racing Pads with Longer Life
This endurance pad, with special formulation for long races, runs cool and wears longer than our regular R-4. Great for extended time events.
http://www.porterfield-brakes.com/
Roscoe