Hi all, just re-did my brakes on my 540i6 sport on Saturday...
stock Zimmerman Drilled rotors, Porterfield R4-S pads and SS/teflon brakelines.
To early to tell but, it seems like they make a nice,noticeable difference,the pedal is harder and the car stops w/ more urgencey.
So far, i am real happy

Michael C.
95 540i6 M-Sport
88 ///M5....STILL FOR SALE