Hi everyone, my car's a 2003 spec v with CAI, headers, balance shaft chain cut, motor mounts inserts and yes I have loctited the butterfly screws. I purchased an ELM327 wifi interface and I logged disappointing results. My maximum airflow with the CAI was 105 g/s at around 6000 rpm. My hypothesis is that the maf I use (stock Altima one) was designed to work with a 2.5 inch diameter tube and that the air flow measured is smaller because of the 3 inch diameter of the assembly. In fact, if I use a thumb rule with the surface of the tubes I get that the 3 inch pipe covers 1.44 times more surface than the 2.5 inch one. So, if I multiply the 105 g/s by 1.44, I obtain 151.2 g/s, which sounds better. I think that the ECU takes the smaller value and applies that factor to send the correct amount of gasoline. That's only what I think! I'd like to have your opinion on those readings I get and my way of thinking. I based that on my friend's 168 hp 2.4 liter Mitsubishi lancer gts that scored a nice 142 g/s! Thanks a lot everybody!