Wastegate flutter? I dont know anything about the 2011 wrxs, but my 07 rex used to flutter alittle bit just before the turbo began to built boost. It could be mistaken for a rattle as i guess thats basically what it is. Does it sound similar to this http://m.youtube.com/watch?v=5VGlKWL0AJw(i had my
Phone cable tied behind the pedals recording)


Here is my thread on it.
http://www.perth-wrx.com/vb/mechanic...e-flutter.html

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