Cognito's Torsion Bar Keys align the truck's front with the rear, boasting a robust, indestructible forged construction for simple bolt-in installation. They adjust the front ride height, commonly used in leveling kits, ensuring ample suspension droop travel for a smooth ride. Different GM trucks have varying torsion bar spring rates; some may not require aftermarket keys for maximum height. This kit suits leveling and lifted applications, made in the USA for 2WD and 4WD trucks.