About your Mac CAI, it could be one of two things that I could think of right off hand. First off, it may simply be the air traveling into the filter from the fender. It makes a sort of sucking ("woosh") sound when given throttle. Second, make sure all of your conections are tight and the heat deflector shield that is next to your fender is not vibrating against the fender itself. Those are the only two items I could think of based on your description.