I have a set of 1st generation KORE springs. These are for a 2 inch leveling lift on a 3rd gen. truck. Will get about 3 inches on 2nd gen. and probably about 1. 5 on a 4th gen. These are stiff springs. They will do very well for the big stuff but will have a firmness on choppy stuff. Will be much softer for the heavier 4th gen trucks. (I used them on my 01. ) There a little rust on the bottom. Will make a nice leveling spring for a 3rd or 4th gen truck. $150 obo. plus shipping. I also have a set of Carli Hemi springs for $200.