Maxima variable intake manifold

[BlueZ31]

In my quest for more street power in my '87 z31 i found something that sparked my interest on the subject of intakes for the vg30e.

 

Apparently (according to wikipedia) the 1989 maxima recieved a variable length intake manifold that bumped it from 174lbft to 184lbft, at first i figured that this was a reference to the vg30de, but that wasnt available till '92, has anyone seen or tried using one of these 1 year only production manifolds?

 

And is it electronically controlled? im assuming it has to be, using some sort of valve to open/close different sets of runners based on rpm's, and im curious if this could be adapted to a 300zx, ive already got torquey street cams and the possiblility of an additional 10lbft of torque or more is always welcome.