OK...I read the break-in section already and I'm not going to get into all of that....but.....I have a question.....Is it normal to have some carbon build up on the exhaust tip during the 1st 500 miles?
It looks like from your profile that you have an Si.
This topic has come up a few times and quite a few Si owners have replied that they have a similar issue. At ~15K and 2 years of ownership (Dec 2005) I still have carbon on the lower portion of my exhaust tip. Not horrendous, but enough that it annoys after a few weeks.