Here's why:
* Geometry Changes: A two-inch lift significantly alters the suspension geometry. While springs and shocks are the main components, other parts like control arms, track bars, and possibly even the axle itself will be affected. This can lead to poor handling, premature wear on components, and even dangerous driving conditions.
* Limited Travel: Longer springs mean more suspension travel, which is usually insufficiently addressed by just swapping springs and shocks. This lack of proper travel can lead to binding and stress on other suspension components.
* Shock Length: Stock shocks may be too short for a two-inch lift, causing them to bottom out easily and potentially damage themselves or other parts. Longer shocks are absolutely necessary for a lift of that size, and choosing the incorrect length is a common problem.
* Alignment: After installing just springs and shocks, the alignment will be significantly off, leading to uneven tire wear and potentially dangerous handling. Proper alignment is critical after any suspension modification.
* Stability: Without addressing the altered geometry, the vehicle's stability, especially at higher speeds or off-road, can be compromised.
In short, while you *can* install the springs and shocks, it's far from a complete lift kit. A complete kit accounts for the necessary geometry changes with additional parts. Attempting a two-inch lift with only springs and shocks is likely to result in a subpar, unsafe, and possibly damaging modification. It is strongly recommended to install a complete two-inch lift kit designed for your specific Jeep model.