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Discussion Starter · #1 · (Edited)
Which is better 2 into 1 or 2 into 2?

I'm looking for better/louder sound and increase in performance and have no idea what to go with. I will be making no other mods such as air filter, Power Commander, or anything. Just want to get louder pipes that increase performance without doing anything else to the bike.

Thanks for the help!
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