i've had CAI (down in front of the guard) as well as something similar to the pic posted by No457 Snowy, the box is back in. after running the 1st two for about 3yrs i got sick of the induction noise, louder DV, i thought it felt more responsive, but who knows, it could just be the noise that makes you think that. anyway, i got used to both and after installing the airbox back in, i was like . wtf! low down torque was much better, the car moved of the line with less effort