1998 honda passport whistling noise during acceleration on 1998 Honda Passport

the noise seems to be coming from drivers side

Asked by for the 1998 Honda Passport
So hard to guess without being able to hear the noise first hand. Could it be a loose fan belt, or a vacuum leak, from the engine intake manifold?
ive been told its prob an exhaust leak, intake manifolds were replaced noise still there, is a high pitched whistle and only during acceleration level speed or idling it doesnt do it. seems to be no miss in the engine