The Detroit Speed leaf spring flip kit is designed to lower the ride height of your 1973-1987 GM C10 Square Body truck 5-6 inches in the rear. 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 pin hole locations in the axle pad to have adjustability in centering up your rear axle. New U-bolts and hardware are included in this kit and are electroplated to help against corrosion.