Thanks for the suggestions guys. Maybe I should revisit those components. I sort of brushed off belts and pulleys after both my indy mechanics threw that notion out the window first. I never second guessed them because the causalities that contribute to the squeal don’t seem belt related. For instance what does me letting my foot off the gas have to do with a high pitch squeal/whistle coming from the engine only when it’s hot… My mind has always been on the intake system because what’s the one thing that closes when you no longer accelerate (take your foot off the gas), air and fuel to the engine, right? Besides so much of the intake is plastic it made sense for something to start whistling only once the engine warmed up and expanded something.

I’ll post a video of the sound in just a sec. maybe one of you guys will recognize it, coz I sure haven’t been able to.