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Split plane intake manifold is for normally aspirated tuning to enhance flow above 3400 RPM. It won't restrict flow with a turbo. What restricts flow in any system are abrupt changes in flow area, even small to large area changes. Air has mass so when the area of flow becomes larger, the air...

The CDR ports are no longer used, you can convert to a dual intake for charge air from the compressor after splitting into two..then you only need a cover for the intake. With a sealed spacer, you can keep the stock air filter, much like the ATS turbo manifold.