@BobCross ... I bet you can answer this one straight out ...
http://mechanics.stackexchange.com/questions/12520/subaru-forester-xt-has-a-hissing-sound-under-acceleration-and-lacks-power
http://mechanics.stackexchange.com/questions/12520/subaru-forester-xt-has-a-hissing-sound-under-acceleration-and-lacks-power