Hello 600cc!

I just got my FZ6R a few weeks ago. I have done quite a few modifications to it and am fairly pleased with it besides for the exhaust. I don't have 1.2K to drop on an exhaust, so I have been looking into replacing the stock headers with R6 Headers and an R6 slip on.
My question to you guys is:
Would 2004 R6 Headers fit my 2013 FZ6R?
What year slip on, and what slip on would be optimal with a 150-300 budget for that not the slip on?
I'd appreciate it folks!