Fox 20-Up GM 2500/3500 Performance Elite Series 2.5 Rear Adjustable Shocks 0-1in LiftExpand your vehicles capability with an oversized performance shock that increases strength, provides control and extended wheel travel specifically engineered for your vehicle. The larger aluminum body dissipates heat more efficiently and the increased internal oil volume allows for more control through FOXs race developed high flow pistons._x000D__x000D_Conquer more terrain knowing with our 7 8 hard chromed shock shaft and a redundant seal pack,