[niterydr]

So the "stock appearing" 3/s crowd would be the TD04 based turbo's, or would we need to run stock housings, or TD04 housings? Can I run a slightly larger WRX compressor housing on my setup or do I have to hog out a 9b housing (stock turbo) to fit?

My opinion is that intercooling should be open. SMIC, FMIC, Water to Air. Most manufacturers have experimented with one, if not all 3, forms, and that is as bolt-on today as exhaust is. Unopened motors, stock displacement motors is where the line should be drawn for "stock appearing"

I've always liked "stock location, stock displacement" classes, keeps it open to creativity and puts definitive limits on what can and cannot be done.