Our 6in Performance System features specially valved extended length front shocks that utilize the stock coil springs for a factory like ride. Massive extended length ductile iron steering knuckles attach to high arched lower control arm crossmembers for superior strength. A 1/4'' thick steel skid plate protects the front differential. Included in this system includes preinstalled wheel bearings, seals and ball joints for a quick installation. Please note that this is a “bolt on'' system that requires precision hydraulic press work to install.