First of all it's only a roll bar(not a cage)..... The braces on the main hoop to the cross bar make absolutely no sense at all but there are no kicker bars required by the rules on a roll bar, so that is jus extra material going for a ride..... The side bar height can vary depending on the size of the driver, the rule says the side bar must cross between the drivers shoulder and elbow(only a driverside side bar is required)..... There is no real designation where the front of the side bar must be although I would have made go further forward the they did(atleast in front of the door opening)..... Also the cross bar on the cage must not be more then 4" below the sidebars which it is.....

A roll bar in a car with a stock floor pan and firewall can go 10.0 in the 1/4 or a maximum of 135 mph, which ever comes first according to the rules.....

In my opinion this roll bar would pass at any track.... You need to always remember that enforcement of rules like these are at the descretion and interpitation of the track..... For example: According to the NHRA rules a car(except verts) can go 11.50 with no roll bar, but Bradenton commonly requests people to get a roll bar in there car starting at 11.90(specially regulars) and that is there right.....

Rules get much more specific when you go to a full cage and have many different requirements according to each specific certification for ET levels.....