up for grabs here is an airbox cover with the mod done to it. Got from someone on this forum 5+ years ago. the cutout is so neat it hardly looks like a modification at all
Then I gave it to my good buddy S.D Willie who mounted a stebel air compressor inside the airbox (haha... yeah he did...
This is a video comparison of a 2005 Yamaha FZ6 stock horn, and a STEBEL Nautilus Airhorn. The STEBEL is mounted in the same location Boneman had his (Boneman's FZ6 Site - STEBEL Nautilus Horn), in the left dash/fairing.
YouTube - 2005 Yamaha FZ6 stock horn vs. STEBEL Nautilus Airhorn