I have a 528i with the M package. I always wanted an M bumper on the car. I was told that the putting the M bumper on my car required a lot of work becuase there were different bracket mountings. It was made to sound like a huge project. /a month ago someone hit my car while it was parked and ripped off the front bumper. Really, it was a coincidence. I went to several body shops and a BMW dealer body shop and they quoted me,$1000 over what the insurance was giving me to replace the original bumper. That was if they wanted to do the job at all. I was told "it is a lot of labor to attach the M bumper". I finally found a body shop that said the job was not that difficult and the adidtional cost would be minimal. They quoted a price of $200 over the insurance company reimbursement. I stilll don't understand why the other shops made such a big deal over it. The body shoop I went to was in Bellmore, NY, Henig Auto Body. John was great to work with.