[bluvikng]

This is something that "jeeptales" can probably help you with. He works for a Jeep dealership, and is very knowledgeable about these things. He is also, not afraid, to research anything.

 

[AzTJ]

Just a guess, but it might have to do with individual pring-rates. Thats why coil lift kits lable the springs for where they go on the vehicle.

 

[Odhinn]

Not sure about the rest but I think the 25X package is just a designation for the combination of the I6 and the six speed manual.