Thanx Chip, kind of you to post. Chip bought the prototype one from me which is now on B9KOS's car.

The plenum being sold comes with a bracket welded on the underside to join up with the top of the engine mount in a similar way to the original inlet manifold.

As Chip has pointed out, you don't want the weight of the plenum, fuel rail, loom and injectors etc ripping the head bolts out!

Simon