When I spoke with a tech at Bilstein earlier this week, he said they tested their 5100s with stock components including UCAs and there were no issues. He mentioned that they probably stuck with 1.8” as the highest because much higher could create problems with stock components (some of their 5100s for certain trucks go up to 2.5-2.75”) Trying to think through it logically, as long as the 5100 shock stops the downward travel I don’t think a ball joint could pop out of the stock UCA... but if the UCA contacting the bump stop is what’s stops the downward travel and the shock and weight of the tires/wheel is trying to push the wheel down further, I could see how the ball joint would be popped out (more like pulled out). Does that sound like sound reasoning? Sent from my iPhone using Tapatalk