RCD's system comes with CNC machined replacement cast iron steering knuckles for precise steering geometry. No drive shaft modifications are necessary for this kit, and it retains O.E. steering components. Fully machined, T-6 Billet 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 geometry and function. All the steel has a 'Gator Blac' polyurethane powder coat finish for lasting good looks! Grade 8 Hardware for reliability. This system also comes with Bilstein 5100 shocks that provide unmatched ride quality. No drive shaft modifications are necessary. This kit INCLUDES (4) BILSTEIN 5100 SHOCKS, which are highly recommended by Jack-It!