I just realized that you mentioned getting the 12 inch travel shocks and wasnt paying attention when I posted. My shocks are the 10 inch travel with 255/70 valving. The 12 inch travel 5150's would be a better application for someone running a 4 inch lift with an extra spacer like phunkeydude had. I took the measurement of the oem shocks provided by adamag25 and the 10 inch travel shocks are perfect extended and collapsed length for the added two inch lift. This might be something you want to consider. I think the 12 inch travel shocks would be over kill. Here is a picture of the XK flexing with the sway bars disconnected. The shocks are almost fully extended and the coil is still snug in place. If the extended length was any longer the coils would fall out.