whats the difference between a roll cage and a roll bar? if my car run 11.99 and below what point roll cage/bar?

 

i believe a roll bar is just one bar that goes along behind the seats. its 4 points i think. a cage comes to the dash and along side the driver. its all over the place

 

it becomes a roll cage when you add a top hoop that goes from the main hoop to the windshield and across the windshield and back to the main hoop along with the bars that run from that top hoop down along the front door pillar to the floor. you can run down to 10.00 with a roll bar and an unmodified floor and firewall.