I would avoid this mod for now. Not because its hyperflow ( I have owned one on MY07 Lib) but because it will net you virtually nothing aside from cool intake sounds.

Your car would be pushing 10 years old now, so how many kms have you got on the clock if you dont mind me asking?

Oh and I moved this thread from intro to mechanical section.
You might want to start another thread in introduction section with a bit about you and the B4, and a couple of pictures of it.

Welcome aboard.

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Funny looking German Subaru