I tried doing a search here on "air box" and couldn't get anything. This isn't the first time I couldn't pull up anything relevant through a search. Don't know what the problem is. Anyway.....I know much has been said on the air box modification however, when I was having my first service done I asked the mechanic whether he had seen many bikes come through that had the air box mod done. He told me that some who had done the modification didn't like the results and purchased new air boxes. Is there anything to this? Exactly what is the flap doing that we are cutting out? Are there any unwanted side affects to this mod? If so, are the performance gains worth it? I have my air box out, plugging PAIR inlets while awaiting my new exhaust, and can easily see what to do to modify the air box but am just wondering whether or not I may regret the modification. Anyone have a thought on this?