[BMRLVR]

Bruce, for someone that claims to do lots of tracking you don't know much about what causes poor braking performance........ wait for it......... WEIGHT.

There is nothing wrong with the brakes on the M3, actually for a road car or a short track with low speeds they are quite adequate, 14.2" rotors front, 13.8" rotors rear, relatively large pads and good brake torque numbers right out of the box. The car is just to damn heavy, and this is true for many cars today. All of the safety features, and options have added up over the years and weight of cars is creeping up.

The 2011 Audi S4 uses 12.6" front rotors and 11.6" rear rotors and sliding calipers........ How well do you think they will take 30 laps carrying 4000 + LBS????