I used a set of those on our '03 325i and after 3000 miles, the dealer just had to replace all the rotors and pads. Apparently, the R4S's had chewed through the rotors. (I put these on at 1000 miles, and the car is only daily driven by my wife). According to the Porterfield dealer, there was a bad batch of these... however, they couldn't do anything for me since the dealer had been nice enough to through away the old pads before I knew to get them back from them. Oh well, $200 down the drain. Won't be buying from Porterfield again... :roll:
Randy