The Wizaired is not held down with bungy cords. It bolts to the fenderwell. The lid does use two bungy type cords that are hard to see, when installed, to hold the lid in place and one to hold the PCM in the tray. The one for the PCM isn't really needed IMO. The duct does suck and always has even through revisions. I like using the stock fduct with stock IAT location, but it's a little harder to install unless you do a little modding to the box.