exaust question

[Mogg]

I have a very clean 91 1100 Kat, almost museum quality bike so I am not looking to cut it up just improve a few things. Stock pipes sound bad although I do not want loud. Will Bandit 1200 full system bolt on motor? I know I may have to tweek the midpipe but looking to go to a single system to modernize the look and sound. And at what point do I have to rejet? I have read factory pro is the way to go and the carbs need a cleaning anyway.
Thanks in advance

[StevieB]

I just test-fit a bandit header. Fits to exhaust ports fine, but early oil pan interferes.

I have a full D&D setup that WILL fit- it came off an 88 Kat1100. YOu could use a different can if you want it quieter than D&D can. PM me.