Yeah, mine whistles when I lightly press the accelarator. It also whistles when the tranny downshifts and lands in the 2500RPM range. It's normal...I like it. I also think it's cool when I turn my car on inside a covered garage. My exhaust is deep and resonates throughout the garage and you can just hear the intake sucking in air.

I'll be back, I'm going for a drive....