Front Upper Leveling Kit Compatible Review

[FITMENT] Works on both four-wheel drive 4WD and two-wheel drive 2WD. Compatible with Chevrolet 2007-2013 Avalanche, 2007-2017 Silverado 1500, 2007-2014 Suburban 1500, 2007-2017 Tahoe. Compatible with GMC 2007-2017 Sierra & Sierra 1500, 2007-2017 Yukon, 2007-2016 Yukon XL. [SPECIFICATIONS] Provides a True 2.5" (2.5 inch) Lift. Includes 2 upper mount black spacers of 1 3/8" (35mm) thickness. Also includes pressed-in studs (Grade 10.9) and mounting nuts (Grade 8) as pictured. Note that your suspension geometry is not a 1:1 ratio meaning the actual item thickness is not equal to the lift height. [PRODUCT BENEFITS] Allows you to avoid the expense of a complete suspension upgrade while still improving aesthetics. Designed to not bend or warp under stress. Allows you to return your vehicle to its natural ride performance. Can fix sag or improper rake from adding a heavy bumper, a camper, an RV, or other aftermarket accessories. Allows you to accommodate taller tires and larger wheels / rims. Should last the lifetime of your vehicle. [MATERIAL & MANUFACTURING] The lift spacers are made from high quality Billet Aircraft Grade Aluminum, CNC machined to exact specifications for optimal durability and fitment. Undergoes anodizing process to prevent surface corrosion and rust. The studs are made of heat treated Metric Grade 10.9 carbon steel. The nuts are Metric Grade 8 steel. Precise machined stud/nut threads prevents cross threading. [INSTALLATION] This suspension self leveling unit does not come with instructions but is completely bolt-on. Please consult a professional if you need support. Should take 2-4 hours to install. Make sure nuts are torqued to correct mfr specifications. The use of loctite is recommended to protect the threads from rust / corrosion and prevent loosening from vibrations. After install your suspension will be slightly stiffer. An alignment after installation is needed to get the correct lift height.