[dad911]

All of the spec boxsters I have seen have done custom cages. I'm surprised the cage above doesn't have the diagonal in the main hoop down to the floor. I'd also want a knee bar behind the dash.

I'm not sure you would save that much. A weld-in Safety devices cage (for a 911) was close to $2000 last time I checked, and I don't think the tubing is pre-notched, so there is still alot of fabricating and fitting.