Ive been told this cage was only used for the race look. Im not sure if it can been used in legal drags.
I dont know much about them as when I got the car the cage wasnt full installed, The pipe is 4cm and with rubber a good 2inches. Ive been told this the normal size.
I know the main hoop seats behind the drivers head, its seats behind the roof light, so a fair bit away from you head when seated.
I also know your back seat may need some moding to make it fit in with the cage.
I was also told if this was going to be used with drag racing that it would need to pass some test.
The cage fits to the roof but does not push the roof in and the is hardly any gap between roof and cage, fits snug.
Sorry im not the best with this if you need more info plz ask ill do my best to answer.
sorry if i didnt answer ur questions to well