Max Trac Silverado Lowering Kit - 4 in. Front / 6 in. Rear S102255 (07-13 2WD/4WD Silverado 1500)
1/2-Inch Extruded Aluminum Leaf Spring Lowering Block: Universal Design for Ride Height Adjustments, 2.5 x 5 Inch, Ideal for Axle & Leaf Spring Configurations, Stronger Than Billet Material - Walmart.com