I am almost certain that it is your TB. I put the stock TB back on just to see if the sound went away and it did. So when i put the 70mm TB back on the wistle came back again, but when the charger went on it didnt happen any more.
str8stangracer, stock TB is def not 70, i think its 60 but its def not 70 because i have a 70mm that is def bigger than my stock, and plus why would companies make TB's smaller than stock?
what i meant was the stock plenum for the GT40 manifold is 70mm. the stock size of the tb is way under 70mm. my stock tb looked like a pee hole compared to my new bbk. ne wayz the noise sounds like its coming from inside the freakin manifold. doesnt sound like the tb is doing it but i will try ur suggestions thnx