Ya know what, it could be the throttle body flanges. My neighbors was doing a chirp noise a few months ago and I traced it down to loose allen bolts on the throttle body flanges. That might be the TB boots you are talking about.
The flange is the 'adapter' that bolts to the head that the throttle body mounts to.
The chirp is air sucking in between the flange and head. Might be the problem you are having.