strap

https://www.brocksperformance.com/Radial-Mount-Front-End-Lowering-Kit+I930411+C41.aspx

My F150's air cleaner slides in and has a clamp that hinges on the top and curves over the cover and you then snap it down. I was looking at doing something similar to the stock airbox. No matter how carefully I put it on and hold it down to tighten the clamps, it will not stay tightly seated...