Sixity Auto 2007-2015 Chevrolet Chevy Silverado 1500 3.0" Front Full Leveling Lift Kit 2WD 4WD 3.0in Suspension CNC Machined from Aerospace Grade Billet Aluminum. Much stronger than poly lift spacers, and will not crack over time like welded steel spacers. Can be installed in only a few hours. No cutting or welding required, and no need to disassemble your existing struts or coils. Note: Due to suspension geometry, lift spacer thickness is NOT the same as the vehicle lift height.