yep, the Del sol VTEC uses a civic radiator (actually a dual core, but same size inlets) and it has the b-series inlets on the block, so they get smaller as they go from block to radiator. I used the GSR hoses (which are not really the right hoses) and they leaked a little bit, but they were ok for a tempery thing. Finally when I got my GSR radiator in there, they worked fine.
With the SI, it uses a full size radiator (basicly the integra style) and on the full size raditors, the inlets are bigger.