Supposedly the Granatelli MAF has better/additional sensor that improves the amount of information transmitted to the ECU (splitting hairs of time I guess), this is supposed to improve performance. It does not have a screen, but it sounds like it does a bit more than simply removing the screen from the stock unit. Who knows? They show some before/after numbers on one website I visited. However the example was not an Isuzu 3.5 so it's difficult to say if there would be marked improvement on a VX.

-- John