I have a 323Ci and was looking into an Exhaust system for it, to give it a little more growl (an omph!, dont you love this termanology). I See that Bavarian is selling a Tri-flo Exhaust System for the 323i and also a REMUS MUFFLER TWIN 76mm round tips .. with one would give more power and is easy to install? and I have not seen any air intake kits. I got a K&N comming in for a Ford Van that is supposed to fit in the 323Ci. for now..
I would am going to wait till next spring I think unless I get some Cash in the next few months.