FABTECH Performance Rear Shocks JK 3 Inch 2007-2017 & TJ 4 Inch 1997-2006 Fabtech Performance Shocks have been designed to work in conjunction with each of our suspension systems, resulting in superior ride control. Features include high velocity 9-stage valving for excellent dampening capabilities and a closed cell insert to reduce shock fade at high speeds. Twin Tube Hydraulic Construction 9/16″ Hardened Chrome Piston Rod 1 3/8″ OD Piston Closed Cell Foam insert High Flow 9 Stage Valving Extended Length – E24.32 Collasped Length – C14.67 Stroke Length – S9.65 Top Mount – EB1 Bottom Mount –