When I bought this new I had slip-ons, stage 1, and PClll. Had it dynoed instead of a canned map. Last year I went with the Bub7 true dual (no crossover), and I found a map for my set-up, so I downloaded it and all has been well. Today I went with a screaming eagle heavy breather set-up. It looks to me like it should let a lot more air in then I was letting in before, but the only option on a map I could find with Bub7 true duals listed a screaming eagle filter only. no choices between stage 1 or heavy breather. Maybe I am worrying over nothing, but it seems something should change to me. Anyone else been here?..Also, i noticed that when i rev the bike up (only ran it for a minute, so never really warmed up) after I changed the filter set-up I see a slight amount of black smoke as the rev get's up there. I never noticed this with my old set-up....maybe nothing, but just one more thing that is leading me to believe I need a map change. Any advice/insight would be truly appreciated! Thanks in advance.