Originally Posted by MoeCity

Okay guys, sorry to bring up an old post but I've been searching for an answer for the CAI whistle problem (after installing my Callaway Honker) and I can't find a suitable solution posted. (The stock box is not a suitable solution to begin with I'm surprised the car could even breath through that thing after seeing the whole thing)

My attempt at the whistle fix (for the Callaway CAI) was to get some HVAC tar ducting tape and jam thin strips of it into the areas where the CAI housing is riveted to the shroud. There were tiny areas where air could have been getting sucked through which caused the whistle... I believed.

Went for a test drive. Whistle still there, even a little worse maybe.

Opened the hood back up, unbolted the "honker" part of the intake (the part that unscrews and detaches from the Mass Air Flow Sensor) and lined a nice strip of the tar tape all the way around where the CAI housing and the "honker" mate up. This should have shut out any remaining areas for air to get sucked through. Securely replaced the honker, and shut the hood feeling about 95% confident I had plugged up any area where air could be whistling through.

Went for another test drive. Whistle still there. Not as bad as first test drive, about the same as before.

Okay, at this point I understand I didn't botch the CAI install, especially since other folks have the same problem after installing a CAI.

Most likely, now that the car is getting much more air flow, the increased flow reacts differently through the intake path: through the CAI, through the Throttle Body, and through the Intake Manifold. That difference = Whistle.

And it makes sense that when another change in flow is created, like when headers are added, the whistle goes away. More change = Whistle goes away

Okay, so I'll explain to the wife that to make the whistle go away I need headers . I'll let you know how that goes.

Thanks for reading -

Originally Posted by Mike Villareale

I have someting whining too, & I assumed it to be a belt. I have a C6 w/ a Vararam, but I still would think that's it is a belt. I even went to my dealer & the said the belt's particular material & harmonic balance may be causing it. Stating they've replaced balances on new C6s due to the noise. Problem was sitting in the service bay & reving the motor would not produce the noise, only under hard acceleration on the road. More confounding is it seems to be more pronounced before the car is warmed up. Anyone with similar experience please chime in