I recently spent a couple of days at the PDC in Spartanburg for the Driver's Program and we beat the crap out of 335i's and M235i's over those two days (as did the participants before and after us). Think aggressive road course runs, slaloms, skid pad, high-speed (70 mph+) panic braking, etc. over and over again. The 335i's had the factory M Performance brake kits installed and not one of the cars showed any fade or issues with the brakes that I noticed.
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