I have an '07 completely stock Wrx Limited. SOME of the time while accelerating with a casual driving style there is an engine tick that is sooooo annoying. Much more noticable if driving next to objects or in tunnels. To narrow it down it really sounds turbo related because if I watch my boost gauge, only when there is minimal boost (throttle needed though) is there this mysterious noise. Under full throttle the noise seems to speed up enough to not sound out of the ordinary. At first I was thinking exhaust leak but I can't seem to reproduce the noise rev'ing in Neutral. (not enough boost in Neutral) Appreciate any suggestions!