2x Front Delrin Lift Spacers2x Front?Delrin Lift Spacer Plates2x Rear Billet Lift SpacersInstallation Instructions and HardwareOur Pro-Series full lifts are designed to accurately lift and level your truck for a truly customized ride. Our front spacers are CNC machined from solid Delrin thermoplastic blocks and precision engineered to lift and level your truck with ease. Our Rear Spacers are CNC machined from solid 6061 T6 billet blocks then anodized to protect from the elements. We use Billet specifically for our precision parts requiring high stiffness, low friction and excellent dimensional stability. Unlike polyurethane style spacers, our rear spacers will not dry up and will maintain a proper lift amount for the life of your vehicle.NOTES: An alignment is always recommended after altering the height of your vehicle.*Does not work with air suspensions