I have not been able to find a clear picture on the car so here is one of the components. Pipes are in their respective locations.
I also have a modified outlet from the SC (pointing towards the front of the car) and a modified inlet manifold pipe (also pointing towards the front of the car).
Width is 350mm and Height is 325mm and Depth 50mm.
Speaking from my AE92 it should be reasonably responsive. I have a LARGE alloy fmic (600x300x70) and it has a bit of lag in it, about 1/2s. But i also have a lot of pipework.
This is a LOT shorter, and should be pretty decent.