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2.0 exhaust valve

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Nismo
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2.0 exhaust valve

Post by Nismo » Fri Apr 04, 2014 10:20 am

Noticed when I was washing her for the first time that the back box has a valve on one of the outlets. Does anyone know at what points this operates?

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