The DSE Speed Kit 3 is designed to lower the ride height of your 1973-1987 GM C10 Square Body truck by 6-8 inches in the rear. The Speed Kit 3 includes the Speed 1 Kit, Speed 2 Kits for a complete rear drop solution! The included Speed 1 Kit features Detroit Speed leaf spring front drop hangers and drop shackles. Both the shackles and hangers feature two leaf spring mounting options that are one inch apart to give you more adjustability in the stance of your truck. All mounting hardware is included. The Speed Kit 2 features a leaf spring flip kit, c-notch, and drop shocks for a complete rear lowering solution. The flip kit axle pad and plate are manufactured from high-quality 1/4" thick steel and powder coated black for strength and durability. Detroit Speed has designed this kit with two leaf spring pinhole locations in the axle pad to have adjustability in centering up your rear axle. There are new electroplated U-bolts and hardware included in this kit. The Detroit Speed leaf spring frame notch bracket kit is designed to give you the proper rear axle to frame clearance needed when doing an axle flip. The c-notch is manufactured from high-quality 3/16" thick steel and powder coated black for durability. All mounting hardware and bump stops are included. Detroit Speeds' line of suspension products is perfect for any Chevrolet C10 truck enthusiast! Continuing to reinforce thoughtfully designed products and modern-day ride quality, we ensure each driver, whether cruising or hauling, will enjoy the look and feel of their truck.