In case you hadn't noticed, this community is SPAM FREE. Wonder why? Because it's actively maintained. If you're planning on posting anything non-automobile related, don't waste your time. We have 24 hour coverage.
What are you going to do with this 330i? Drive to work/school? Go cruising on Saturday nights? Go to church on Sunday mornings? How many people are you going to take with you? How far will you be driving and in what kind of weather? Maybe it will be better if you just park the car and walk to school or work. How LOUD is too LOUD? Did you try MIDAS or SEARS for a cheap exhaust?