440 aspen

I recently got an edelbrock pro flow air filter and was wondering if anybody that is running one ever hears whistling? Shortly after I put it on I started to hear a whistle coming from my engine. It does this at low rpm when I have my foot on he gas. I know Its not a vacuum leak or my power stearing and this is the only thing I can think of

RacerHog

More than likely a it is a throttle plate whistle.... Goes away when you open the throttle...