Originally Posted by ebp123
I have the 3.5" superflex lift kit and was wondering what is needed to upgrade to 4.5"? Is it just the coil springs?
Well the difference
between the two kits (besides the coils) is the 4.5" kit has longer front bump stops, adjustable upper arms front and rear, an adjustable front track bar and longer front disconnect links and a slightly different rear track bar bracket.
Now weather you actually need to change all this stuff over or not is questionable. I would say throw the coils on there and see if it works on your Jeep.