Artec's new TJ Rear Coil Correction Kit fixes a common problem on lifted Jeeps...bowing springs. The OEM spring perches were set at an angle which is great for no lift but once you start to lift your vehicle, the angles change resulting in bowing spring that can be permenantly damaged an even unseated during articulation. Their correction kit eliminated the factory angle allowing any lift height with no bowing. They even add provisions if you want to do a 1 inch stretch. This product ships in approximately 1 days