BLUHAMR: just a little clarification when ordering sliders, when they ask you if you have a lift, they only care if you have a body lift, not suspension lift. if you order a set of sliders for a 2" body lift, and you only have a suspension lift, the will not fit... You stated you only have a 2" suspension lift so DON'T order sliders for a 2" Body lift.
Valentin36, from looking at your build and randomly seeing your xterra, you do not have a body lift, unless it is not listed on your page and I missed your jacked up xterra. A body lift consists of putting 2" blocks under all 10 or so body mounts and lifts ONLY the body 2" above the frame and suspension. A suspension lift, whether it be spacers, replacement springs/coilovers and/or shackles will lift the entire truck but leaves the distance between the body and frame the same as stock.
Since the sliders attach to the frame, but are there to protect the body, the welder needs to know if you have changed the distance from the frame to the body, hence the question if you have a body lift or not. It is true, if you do in fact have a body lift, you can install non body lift sliders, you will just have 2" of extra space between the sliders and the body, but the reverse is not true, sliders built for a body lift will not fit a vehicle without a body lift.
I'm glad you decided to not order your sliders for a body lift because I wouldn't want you to be disappointed when they didn't fit.