Thread: Air Flow

My 2003 GT makes quite a bit of air flow noise from the stock air box....but not all of the time. Sounds like a vac is on right behind the DS headlight where the air box is. Runs good and no CEL on. Getting 22-23.5 mpg. All tune up parts done.
Is this normal on these cars? I don't remember my other previous Pontiac's (Grand Am's) sounding this way.

Thanks FFDP. That seems to be the case here. Just making sure all is well. I've been considering trying a CAI. I imagine it would be just as loud, just a different tone.