I just received a new compressor from "suspension masters". In preparing to install it I notice that the "brown line" port on the cylinder head has not been drilled thru nor tapped. Have any of you run into this issue? Is it just a manufacturing flaw or was it done intentionally, perhaps do to unit be used in different applications (Porsche, Audi,Touareg) and requiring unique tap sizing. If so, does anyone know the correct hole and tap size for the 2005 Touareg?
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