I have a 1999 GS-T

About 2 weeks ago I installed a Greddy Profec B spec II in my car, and ever cince then, I have been hearing this loud whistling noise, really high pitched, it starts at about 10psi, and it only happens when im giving it about 60/85% gas, sometimes it sounds when I give it 100% gas, it sounds like its coming from the intake side of the engine, but somtimes it sounds like its coming from the turbo Im not sure if its a blown turbo or a vacumm leak, does anyone know what it could be? thanks for the help