2x Front Lift Billet Spacers2x Rear Poly Lift SpacersInstallation InstructionsOur Pro-Billet series strut spacer lift kits are precision engineered from 6061-T6 aircraft aluminum, then anodized for a superior finish. Billet aluminum is a great material for use in suspension applications as it has an immensely high strength to weight ratio along with a superior level of corrosion resistance compared to many other metals on the market. Unlike steel kits that are cut-out and welded together, our Pro-Billet kits are machined from a solid piece and will not bend or warp under even the most stressful conditions.For applications utilizing larger diameter rear coil springs, we recommend our poly rear lift kit. Injection molded from ultra-high density urethane, and impregnated with special conditioners to never dry or rot. These spacers have proven time and again to provide customers with the fastest, most hassle-free install, while maintaining your smooth factory ride quality.NOTES: An alignment is always recommended after altering the height of your vehicle.*Will NOT fit 4Runner Limited models with X-REAS hydraulic struts.