I have an 11 Limited that I'm going to replace the stock head pipe with another one that I have removed the CAT out of. My question is can I reuse the original exhaust gaskets on the heads? Also is there a gasket in the cross over pipe that runs under the frame and can it be reused? The bike has less than 200 miles on it but I know some gaskets are a one use deal.
ONE use gaskets! Pennies to replace once opened up - $'s worth (or your time) of headaches if they leak after the fact! IMHO - DO IT RIGHT THE 1ST TIME!
Can you? yes. Will it leak? probably not. Do you want to take the chance? I wouldn't. They're cheap and mise well do it while your there. Manual says to replace them.
I don't recall a gasket in the "crossover" as you say. The general consensus is to rip the old gaskets out with a hook and, be careful not to get any extra debris down into the engine when ripping on them.
For a couple or three dollars your new gaskets will be a safe bet.