I have about 2 inch lift on and I want to replace factory shocks with Ranchos, I've heard they run long so I would need like a 1-2 inch lift shock. I'm very confused on what the number on the shock mean. I know that the shock you want is the RS5000X but there are other number after that and I have no idea which ones to get or where to get them. Any help is appreciated fellas.