If you have spent any amount of time working on street machines, you are well aware that “bolt-on” parts do not always bolt right on. Still, it’s often a lot easier to modify those parts than to fabricate your own. The same holds true for such items as rollcages. Nobody pretends that a prefab cage is going to drop right into place without having to trim a single tube. That’s mainly because the economies of scale dictate that manufacturers make a single design fit as many cars as possible. Unfortunately, a cage that fits many cars probably fits no car perfectly.
