I can't exactly answer your question, but I just had the stage 1 and SEII slipons installed on my 35th before it was delivered. I asked my dealership about the air cleaner, and they strongly advised against it due to the lean condition. He said the 06 bikes don't need the high flow air cleaner with stage 1 and slip ons. I guess the guy I talked to had just been to a seminar about the 06 bikes and mods or something like that. I may also research some more and call around for a second opinion. I am still debating whether to do a better air cleaner, since I can't leave anything alone! lol Anyway, I thought i would share what little info that I have with ya!
Tara
Tara