In Reply to: I have the same problem. posted by MPike on November 21, 2000 at 09:10:30:
I have DTM pipes and no cat. My bumper gets dirty quick. It's not as obvious since my paint is diamon schwarts. I've seen white M3s that can't even get to the end of the street, after a car wash, without having black soot appear above the muffler tips. Is the mixture too rich, or is this normal?