if im not mistaken the stock box was a semi sealed intake and the turbo recirculates boost back in front of the filter. when you put a CAI onto it the air dumps but is able to escape from the cai before it has time to be re used? have you looked at getting a tune? there is a guy on here selling his UNICHIP set up it is 100 times better then any crap tork can put out. also look into HPSI and ROADRACE they have tuner boxes for the 1.4 right now. and HPSI is putting out a full custom tune handheld soon.
do not be fooled by tork's BS handheld. if SYKEDECUTUNER.com tuners dumped him there is a reason. without data logging and real Tuner Support its just a can tune. anyone who claims to be a true tuner without data logging is bull.