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· Super Moderator
1986 FZ 600
90 Posts
You shouldn't have to re-jet fora slip on. It isn't going to flow more, it is just going to muffle less. If you were to go full headers then you might look at re-jetting. Are you running the stock air filter?

As for recommendations, I am a sport bike guy so Yoshimura and Akropovic are quality. I would stay away from any M4 megaphone style mufflers, they are very loud. Vance & Hines may have something for you.
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