Zone body lifts include everything you need to properly lift the body of the Chevy Trailblazer, GMC Envoy 4.2L. Designed for easy installation and long term performance. Zone crush Proof body lift blocks are capable of holding up to 60,000 lbs. New longer grade 8 body bolts are included. Includes front & rear bumper brackets, steering extension. Rear bumper brackets are for appearance only. The rear bumper cannot be used for towing after installation.