Got my 372 X-Torq in today, and had to tear it down to see what the heck was going on in there. Haven't run it yet, and Barney34 is coming over to have a look, so we'll put it together and run it later today.
You really have to take the thing apart to see how they are grabbing the clean air with a single throat carb. Essentially, the throttle plate, choke plate, and a third permanent plate between them, keep the clean air on top, and the fuel/air mix on the bottom. So, in that way, they are sharing the single throat of the carb, which is slightly larger than on the original.
Brad, and all of you porting guys will quickly notice that the intake port is smaller, as are the transfers, which are now one channel on each side instead of the traditional two per side.
I took some pics, which as was the case with the 560XP, I'll have to shoot them over to MFunaro and maybe he can get them up later. Somebody comes over here and shows me how to post pics might go home with a free saw. (Not this one though LOL)