Skyjacker 3.5-4" 07-13 GM15004X4,HYDR

This lift kit improves daily driving and off-road performance with enhanced strength and clearance. It features CNC machined ductile iron replacement steering knuckles that maintain proper steering geometry, align to OEM specs, and work with the Electric Stability Control (ESC) system. The kit includes gas-charged, twin-tube Skyjacker Performance Struts with variable nine-stage valving, stroke specific to the application, a leak-proof internal piston seal, and a large chromed piston shaft. External microcellular foam shaft bump stops control suspension travel. Sturdy front and rear crossmembers are CNC laser cut and precision formed, providing solid mounting points for OEM lower control arms. CNC machined 6061-T6 Aluminum differential and front CV spacers correct CV axle and driveshaft angles. Rear dampening is enhanced with ADX 2.0 Adventure Series Remote Reservoir Aluminum Monotube Shocks, offering unmatched damping and specific valving/stroke. These shocks have an off-road race-inspired full-displaced valving system, a large 2.10-inch (53.5mm) OD Aluminum body with a 1.81-inch (46mm) ID bore size. The external remote reservoir separates nitrogen gas from oil with an Internal Floating Piston (IFP) to prevent mixing or foaming. Nitrogen charged with IFP Technology ensures quick shock reaction time.