hey bmw brothers..im quite a newbie here..so i need ur vast experiences with bimmers..im getting a 2007 523i (the facelifted one) soon so i thought of 'enhancing' with some goodies..and the thing is im trying to match up with my bro's 2004 525 which is currently upgraded intakes and exhaust systems (using Hamann's)..i also noted dat the BMW hav increased the output for the 07 models,so does dis increase the chances too?hope u guys can help me by recommending some minor modifications such as exhaust,intakes or ecu upgrade so as to match up with my bro's ride...Thanks and Cheers!! 
