2007-2018 CHEVY SILVERADO GMC SIERRA C1500. (R) 1-2" Adjustable Lift Powder Coated Steel Leaf Spring Hangers for the drop axle flip kit. KIT CONTENTS 1 YEAR WARRANTY For all products. All of our parts, be it suspension parts, electrical parts, engine parts, body panels, drivetrain parts are ISO/TS16949 certified by quality manufactures from all across the globe.