So what's the deal...... I am starting to see them more and more (on show trucks at SEMA, etc) so it's just a matter of time before absolutely EVERYONE installs them. /forums/images/graemlins/rolleyes.gif To my understanding, this came from the desert racing folks. My best guess is that it allows for a more gentle "bottoming out" of the suspension than a standard rubber bumper? It still seems like once it's bottomed (hydraulic or mechanical) it's still going to slam the driver pretty hard??? Anyone want to take a crack at answering this one? /forums/images/graemlins/thinking.gif .