VR6 engines have been using a variable intake for a long time. Pretty nifty idea. That picture you posted, Jake, is from engine code BDJ, which is a 2.0 SDI engine, 77 hp. Found in 04 Caddys, and 04-05 Golf.
Euro only, of course. Part number is: 038 129 711 CB, and the "throttle body" is a separate piece, 038 128 063 C.
You should see the hoses and tubes that come from the air cleaner!! What a mess!!!
Brendan
84 Scirocco 8v
00 Camaro L36 M49