what race series is this "cage" supposed to pass tech for? this would not pass for any door-to-door race series I know of. maybe it's OK for drag, I don';t know the specs.
perhaps the pics aren't clear, but this looks like a ROLL BAR to me. there is a big difference between the two terms.
a CAGE has A-pillar bars, bars up over the doors, and bars in the door openings, longitudinal and transverse bars between the base of the main hoop and A-pillar bars. a cage ties into the front suspension as well as the rear. a cage needs X-bracing between the bars that support the main hoop and go back to rear strut tops.
this roll bar install has what appears to be harness bars in 2 places, no x-bracing. from what the pics show, you could expect decent protection in a straight rollover (long as you dont land on front edge of windshield, which is where Suby roofs like to buckle), zero added protection from obliqe or frontal incidents, esp in side hits. wondering if the bars are bolt-ins or welded to chassis with proper reinforcement plates.
not criticizing, just pointing out facts and asking questions.