I recently removed my dragon throttle body/plenum due to idle issues, installed new accufab, and changed filter on RAI to amsoil, now getting whistle/vacuum leak noise when first starting up and when you let off gas you can hear whistle, i have heard accufab or most aftermarket throttle bodies do this but my dragon didnt do this unless my old RAI filter was so dirty when i put on the dragon that it was not sucking in as much air as the new one is.. does this sound ok?