You need to clarify a little. A roll bar is the main hoop (over your head) and two rear extending down tubes that mount to the frame rails. It give you protection from the roof caving in should you have an episode that rolls or inverts the car. What you pictured is a 6 pt bar. And it's useless as anything more than a roll bar, and adding weight. In a side impact, the hitting vehicle will ride up over that bar, and it sure wont keep you from flying out should the door open. Also, I cant see if it has the seat back/brace bar that runs (and supports) the two sides of the main hoop running behind the seat. That's the bar the belts get hooked to. The specs for most sacnctioning bodies is the main hoop must extend 2" higher than the top of you helmet, and the door bars must intersect the line between your shoulder and elbow in the driving position. It's been a few years, but I think that's how they write it. In any case, if you need to get in and out easy, use the swing out door bar kits. But truthfully, a well made custom roll bar will give a little benefit, and allow use of the back seat by smaller people. a custom cage menas more protection, but more cost and less usage of the rear of the car. Really you should ask yourself if you need the protection. If you want ballast, stick weight in the trunk.
