well, only 500 made, never offered in the us, imported, you better have deep pockets.
it was a VW Motorsport developed manifold that mimics the same style "shift rod" inside the manifold that was used on the MK4 plastic manifolds. in a sense a "flap" that changes the geometry of the air passage.
they come for sale every now and then. expect to pay approx 2k for a complete one.
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