I have no idea, but I tried it quite a few times and the bowl got finished real quick every time and the high was fairly intense, but short lived. Didn't care for it. I used the adapter with vapexhale dry mouth piece too and that was great. Alas I broke the adapter and haven't got round to get another. I like the stem well enough. Less resistance would be nice though, but what I really enjoy about the solo is how little maintennace it needs and how easy it is to fill and empty.Why would the high be any different? It just takes away some of the draw resistance. It takes really long to finish a bowl even with the added glass.
edit: i've had volcano, haze v3 and vapexhale prior to solo2.