It could be for the air filter bolts. They can come loose and block the throttle bodies in the open position. this is bad. I think that's what you're talking about. They have a new style filter that keeps the bolts from coming loose.
Yes i was thinking of that to since it goes on the same air box, or whatever you want to call it. Are there full systems for the 06,07 models thgh? I recall seeing K&N but not for the 2006. And it was just the filter to, is it like cars, that come witht the OEM box, and if you want more HP. You have to go with air intake..>?
I need to take a look under my gas tank.