Type：lowering torsion key. 2x Front torsion keys. Torsion Bar suspension required. for Chevy Silverado GMC Sierra & 2007 Classic 1500 4WD 4X4 1999-2006. Lowering height：Front 1"-3". Durable AT Radiator Assembly for Silverado Sierra 2500HD 3500HD 11-16 23172440.
