Check out bimmerforums.com it is the most active bmw forum, and they have TONS of parts for sale every day.

FWIW, I will be boosted within the next 2 months, and will have a Jim conforti chip and carbonio carbon fiber intake for sale.

Is the car a 96+?

Check out raceland headers. They are only $125 and have been proven repeatedly. If you are OBD2 it will throw a check engine light though.

GL