2x Front Billet Strut Spacers2x Front Lower Shock Spacers2x?Rear Billet Lift Blocks4x Differential Drop Spacers4x Premium Electrostatic Powder Coated U-BoltsInstallation InstructionsIMPORTANT: FITS 6-LUG MODELS ONLY3.5" MAY REQUIRE ADDITIONAL COMPONENTS*Does not fit GMC Sierra Denali models with ARC Suspension / Magna-Ride / Auto-Leveling Suspension*Will Not fit 2019-2023 Sierra Elevation using SU4 or SU5 Differentials.Our Pro-Billet series full lifts are designed to accurately lift and level your truck for that more aggressive look over stock. Unlike steel struts and blocks that are cut-out and welded together, our Pro-Billet kits are crafted from solid blocks and will not bend or warp when under high stress loads. An incorrect pinion angle can cause driveline vibrations when driving at speeds, and will severely shorten the lifespan of the differential pinion bearing. The differential drop kit is highly recommended for 4WD model trucks with independent front suspension. This kit will lower your front differential to reduce the excess wear on CV joints and axles while adjusting the skid plate location preventing any damage to your trucks components. Each unit of this kit is machined from 6061-T6 aircraft aluminum, then an anodized coating is applied to protect from rusting. We complete this kit with our high grade hardware and extended OEM spec U-bolts keeping you’re parts safe and secure.NOTES: An alignment is always recommended when lifting your truck