Here's a pic showing the difference between OEM and SL. You can see how much longer the UCA mount is as well and the tie rod mount.




And what I have found is the racks are hit and miss. Some seem to give up quite easily while others are more robust. It also greatly depends on how the Jeep is driven. If you spend time off road, particularly more difficult trails where you max out the travel and take hard hits, then it probably won't live as long. But if you really ever wheel it or stick to easier trail the rack will probably last longer. I am sure weight also has a big role to play!