I added the Ford Racing intake manifold and throttle body pack to my '06 GT about six months ago, and ever since the engine makes a whooshing, whistling sound while cruising. It's just loud enough to only hear it when driving under an overpass. Has anybody else encountered this?
Yes, it's the TB, I added GT-500 unit to mine and it makes the same noise, mine is actually more noticeable. It's increase flow of air making more competition killing HP. No worries.