Originally Posted by Dark_Knight_335
Forget making it quicker (by much anyway.)
Google Active Autowerk, get their flash tune. That's about as good as it gets.
Otherwise go the lighting and cosmetics road.
Trust me, I know
+1 same here...that's why I just made the move to a 335i. The xi compared to my previous BM's was sluggish and didn't drive like an ultimate driving machine. Your best bet is cosmetics, but I must say it is fun to smoke an M when it's snowing out