Don't get a Dinan chip, they are very conservative, and overpriced. I don't have a number, but he may be a member here, try Mark D'Sylva, he's a well-known chip tuner
in Toronto, about doing the chip.
I went with him, years ago, and he let me test two different ones before I picked the one I liked. Great price, only downside....octane 94 all the time now.
1998 323is Track toy