RCD's system comes with CNC machined replacement cast iron steering knuckles for precise steering geometry. Fully machined, T-6 Billette Aluminum axle spacers maintain proper axle lengths. Heavy Duty two piece lower sub-frame assembly and a polished stainless steel 'Twin-Link' anti-compression struts insure structural strength and durability. CNC machined, zinc plated billet steel 'Super-Flex' sway bar end links feature an upper ball joint assembly for smooth operation, optimizing sway bar function. All the steel has a 'Gator Black' polyurethane powder coat finish for lasting good looks! Grade 8 Hardware for reliability. This system also comes with Bilstein 5100 Series shocks and provide unmatched ride quality and performance. No drive shaft modifications are necessary for installation. Vehicles equipped with a 2-piece rear drive shaft may require modification to lower the factory carrier bearing.