Have not found an answer one way or other on this. I would like to make a small pass thru on roll cage,using a welded in tube maybe 3/8 to 5/8 max size/ Anyone know where its legal or flat out no no. Other option would be thru shoulder hoop passing from the cockpit to rear/Pretty sure that is legal and would require a doubler around opening if to large. I know there is size and can find if going that route.