Now you can create a real performance lift system with ESP (Electronic Stability Program) compatibility with Superlift’s EGR tool. The Electronic Geometry Recalibration (EGR) tool delivers accurately optimized steering input signal to the XK and the WK’s ESP unit. It uses AEV’s technology and installs beneath the dash using any wiring harness available. These models’ ESP feature has been the bottleneck for most suspension manufacturers. Superlift EGR fixes this and provides your Jeep better stability and drivability after upgrade. EGR works on any Superlift 4’’ lift system for the Command XK and the Grand Cherokee WK.