I have contacted them. They do not have any instructions on how to go about cutting up the stock airbox. Thats more or less what I was looking for...some step by step

07 TBA, 32" Turnouts, DIY Freak, hard saddlebags, 18" screen, dresser bars, highway pegs, floorboards, fog lights, amber run/turn lights front, red run/turn/stop lights back, blue speedo/tach lights, LED console lights