I have the same concerns about the compressor housing. You may be able to get a clamp on there, but your filter will probably fall off on every hard launch. The Turbonetics website is terrible and I don't see any compressor maps for this turbo. Perhaps you could E-mail them with the specs and ask for a compressor map or anything they will give you. After pawing through the ATP Turbo website, they have a similarly sized Garrett turbo rated for "350 HP". A T3/T4 is the go-to turbo for bolt-on 4 cylinder kits. Maybe not ideal, but it is a good place to start.

Corbin
'97 GSX dressed like a '95 ESi