just got my 04 SVT, the last owner installed an AEM cold air intake. When i shift there is a short whistle, (sounds something like a bov), i dont really mind. When the engine is revving from 3k-4k at medium to full throtle there is an annoying whine, (sounds like an old train on an old track). i asked a friend who was a tech @ a ford dealership, couldn't give me an answer, but did recomend taking the AEM intake out and putting the stock SVT one. any ideas???