MINI135I, i have not tracked my m3 yet. Its my daily driver, so i cant answer your question. The main reason for that is, it is fully loaded(about 3700 pounds), too havy for a dedicated track car imo.
On the other hand, i am very impressed with my 135i.
It has m3 conversion kit, kw3 coilovers with swift springs(400/800), camber plates(-3 on both front sides), upgraded brakes, APEX wheels with BFG r1(245/265). The weight is reduced by 200 pounds, stock engine for now.
I am waiting for COBB AP tune and with catless downpipe this car will be a little track monster
