My control arm bushings have gotten really bad now that I have driven 1000 miles on it and noticing lots of old spider webs on my brakes and under my car im thinking this car was sitting for a good while, anyways I went to the dealership to get a list of part #'s for tie rods and control arm bushings, I noticed I find that the zhp CAB prt # is 31 12 6 757 623 but at the dealer was given 31 12 6 783 376 I asked him why its different and he said the part number I provided was superseded to this number. Any one know the actual part numbers for the performance package? I'm thinking bmw just got rid of the zhp part and just use the downgraded regular stuff now.