Well if you are going to do it yourself with the MEK for the 600 it is a pain in the arse, I totaly destroyed the muffler getting it seperated from the tail pipe, installed the straight section, and found it to be way to loud for my ears and drone was horrible, installed a magnaflow with the straight pipe and still to loud but dont want to pony up for a factory muffler again... . if you are happy with it the way it is my advise is to keep it stock... quiet and functional... .
my . 02 worth...