IT IS A BIG DEAL....Contact Fibrobec and they wiill tell you what to do.... there is what is called an installation pkg, which is nothing more than some boards that go under the spacekap and at the front that keeps the unit aligned and at the proper height off the truck bed, depending on what vehicle you have. Fiberbec is in Quibec 1 800 363 0655Don’t have airbags. It isn’t the truck that rocks side to side but rather the spacekap itself inside the bed. I don’t think it matters so much for the trucks handling. But sure squeaks a lot back there and it definitely has been rubbing the paint away in some small spots from the back of the cab. It’s probably not a big deal at all at this point it just bothers me. I’ve thought about bolting it down.