2x T6 Billet Aluminum Strut Spacers2x High-Strength Steel Lift Shackles2x Rear Pro Comp PRO-X Shock AbsorbersInstallation Hardware and InstructionsNOTES: ? 3" Front Lift Strut Spacers are NOT compatible with PRO-4X model.Developed and rigorously tested by in-house engineers, our Pro-Billet Series Strut Spacers are precision CNC machined from solid T6 Aircraft-Grade Billet Aluminum and finished with an Anodized Coating for maximum resistance against oxidation and corrosion. Renowned for its sheer strength and light weight, this premium lift material will never compress or warp under even the most excessive loads or extreme riding conditions.The rear shackles are engineered to lift the rear end of your truck by 2 inches without sacrificing OEM factory ride quality. Each shackle is precision Laser Cut from High Strength Steel for outstanding performance and quality providing excellent strength and resistance to deformation. A proprietary corrosion resistant textured black powder coat finish is applied to prevent oxidation and corrosion, keeping your kit looking great and functioning for years to come.Pro Comp PRO-X Twin Tube Shocks are also included to improve your vehicle's off-road handling and performance. With their twin tube construction and 10 stage velocity sensitive valving, these shock absorbers are the perfect complement to your lifted vehicle and will deliver a more stable, controlled, and comfortable ride. The large 5/8 inch chrome hardened piston rod and unique Teflon rebound stop delivers a comfortable highway ride and the ability to handle the most demanding driving conditions.*An alignment is always recommended after altering the height of your vehicle.