Ongoing argument of bead locks and other mods. Where do I look for the information for my state? Do any/all mods have to be DOT approved? Or just the ones that say "for off road use only" being a no no. If so, is my home made bumper (stouter than any on the market) illegal because it is not DOT approved? Getting a little more in depth.... Cars from the factory must have certain parts DOT approved. If DOT includes mods done by the owner, what could we be missing? For instance, the stereo. I know it is highly unlikely DOT regulates them, but it is just an example. We tweak so much in our rigs. What could we be missing that isn't so obvious?