Information: High-quality products of the chassis parts series. Made of high-strength steel tubes for superior strength and durability. Stable performance, reliable quality and long service life. Uniform thickness, no gas bubbles, slag, cracks, breaks or incomplete fusion. Measured by specialized inspection instruments after welding to ensure that the dimensions of the assembly hole, bushing insertion and installation are correct. Professional installation is highly recommended (instructions not included) Post installation adjustment is highly recommended Compatibility Chart: For Chevrolet Silverado 2500 Hd 2001-2010 8-Pin For Chevrolet Silverado 3500 Hd 2001-2010 8-Pin For Gmc Sierra 2500 Hd 2001-2010 8-Pin For Gmc Sierra 3500 Hd 2001-2010 8-Pin Compatible with vehicles lifted 2-4 inches Package Contents: 2* Front Upper Control Arms (Left & Right) Discount is waiting for you in the basket