8" of travel with 400lb springs. They are the ones that WFO Concepts spec out for their SAS kits. I drove Trevor's truck (owner of WFO) and they were amazing, so I figured why try and figure it out when I knew how these worked. So far, they are great and I am very pleased with them.Question about your coilovers up front. What spring rate and length did you use? A wild guess would be 14" springs with 500lbs/in?