Includes 4 Premium Electrostatic Powder Coated U-Bolts. Includes 2 Machined Steel Rear Lift Blocks Powder Coated Black. Precision CNC machined for perfect fitment. Allows for Installation of Plus Sized Tires. Proprietary Protective Coating to Prevent Oxidation, Corrosion & Rust.Includes complete set of high-strength installation hardware. Simple Instructions for Easy, Do It Yourself Installation. We are proud to offer you our High End Lift Kit designed by our experts and precision machined from optimal, corrosion-resistant material blends not only to lift your truck but to improve your ride quality and comfort as well as lifetime use. Our Pro-Billet Front Spacers are precision CNC machined from T6 Aircraft Aluminum, then Anodized for a superior corrosion resistant finish. The SOLID single-piece construction ensures extreme compression resistance, while still being light-weight and resistant to typical corrosion associated with off-roading. For lifting the rear of your vehicle, we are proud to introduce our New Low Weight HD Structure Steel Blocks. Using heavy-duty GMAW seam and fillet welding processes we reinforced it's structure with a 1/4 Thick CNC Plasma Cut Center Support Structure to ensure stability, perfect fitment and easy installation. These Blocks are fabricated with 3.4th dual pins specific for the F-150 model and can withstand an astonishing load of almost 60,000 lbs with no yielding or deformation observed! Our extended U-bolts rise to expectation by being ISO 9001 certified and stamped and exceed current standards in the auto industry. Supreme Suspensions High-Strength Steel U-Bolts are bent & threaded to exact specifications, and finished with an Electrostatic Powder Coating to ensure the maximum level of protection and corrosion resistance. Especially engineered for off-road and heavy duty applications, these U-bolts will restore the clamping force on your spring assembly, maximizing safety and ensuring that you get the most out of your rear lift. Choose the right kit the first time, Choose Supreme. Call or message us if you have any questions about our Leveling Lift Kits or place your order today! NOTE: Lift amount does NOT equal spacer thickness. Strut spacers use compound ratios to provide lift amount. Example: A 2" lift kit spacer will be roughly 1.25" thick, depending on the application. Customer Service & Return Info. Looking for any additional accessories?