Wilwood supplies enough different pad compounds that you have your choice of what kind of life expectancy you want.

When I did the back brake install, I tried to find out what compound I had to do a best match for the fronts and even Wilwood couldn't tell me for sure without actually seeing them. They, at least at that time, didn't manufacture their own pads but subbed them out to several different companies. My backs are Hawk, but the color is wrong for that number.