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Old 11-03-2008, 05:08 PM   #75
Turn in Concepts
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Join Date: Aug 2005
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Originally Posted by SVXelerator View Post
What you've found is the IRIS valve that Subaru designed into the intake to provide a dual plane design based on engine vacuum. Given what you're setting out to do, you might just want to remove it and tune.
I would agree. Since most of the time it'll be at high RPM with that motor just ditch it.

when do you go in for the new suspension joint?
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