It appears to be a very advanced and expensive two injector horizontal throttle body that still depends on the original intake manifold to deliver both fuel and air. The B20 D-jets and K-jets were at least muti-point, and used an intake manifold of tuned length. The TWM stuff doens't even do that.
All the pretty billet machined stuff doesn't make horsepower, and hanging it on the original intake manifold and depending on it for fuel distribution and homogenization isn't impressive.
Webers or K-jet. That's all you need to get max out of the B20.
I have often thought of taking a B30E intake, water heating it, and welding a flange to accept a small Holley four barrel. That would be neat, and probably work OK once it was warm. Make for a good sounding B30 anyways, and cheaply.