It's just that when you get an after market bar, you'll have to chop the reinforcement bar for it to fit tightly and look good. The part I circled would be thinner than what the reinforcement bar really is so you would cut the reo bar so that you won't see it. Hope that made sense.
I'm not too sure about the 34's, but in my 32, there were no problems with the reinforcement bar so I can't really say about adjusting pipes, etc.
Edit: Forgot to attach pic.