Using leaf springs from another jeep/vehicle and adding them to your existing leaf pack - bastard pack.
Sorta like an add a leaf .
And seeing your somewhat of a new member, i will tell you something. A handy google search box is at the top of most every jeepforum webpage. Its a google just for Jeeps. Most if not all of your questions can be answered using it. If you are stuck, please post back and someone will be glad to help