Question: jeep xj must do mods?
Answer:  Lift kit (Suspension) minimum 3 in.
 AT or Mud/Terrain tires (31in. ... 
 Dana 44 rear axle with 4.56 gears.
 Front and Rear lockers.
 Sway Bar quick disconnect.
 Tow hooks, lift points, and recovery gear (winch)
 Aftermarket skid plates (Min.