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I have a similsr question. I have a 2007 Fatboy, PC111, V&H Big Radius, and the mapI found was for the SE A.C, would it make that much of a difference if I went with the K&N AC instaed of the S.E?
I seriously doubt there's enough difference between the two to make any difference. I was using the Rush slip-on mufflers in lieu of the SE versions and my bike ran just fine.