We have bundled everything you need in a leveling kit for your Silverado/Sierra 2500/3500 2WD/4WD with high quality Cognito components and Fox shocks.There is no guesswork. Cognito components are engineered, manufactured and assembled in the USA. This kit includes the Cognito Ball Joint SM Series Upper Control Arm Kit, Torsion Bar Adjuster Keys, Cognito Pitman and Idler Arm Support Kit, front and rear Fox Performance Series Remote Reservoir shocks and front shock spacers to maximize droop travel.The Cognito Ball Joint SM Series Upper Control Arms feature boxed sheet metal arms that are welded, and powder coated semi-gloss black. Pre-installed maintenance free ball joints and pivot bushings are included.The Cognito Ball Joint SM Series Upper Control Arms adds performance to the Chevy and GMC truck by correcting the ball joint angle for lifted and leveled applications, increasing droop travel, and increasing caster slightly for better highway speed drivability.The Cognito PISK (Pitman and Idler Arm Support Kit) replaces the problem components that plague factory and aftermarket steering systems on several models and years of GM trucks and SUVs. These improvements are accomplished through application of Cognito's innovative, patented design, by providing additional support to the vehicle's pitman and idler arms, which eliminate the forward and rearward movement of the center-link.Fox 2.0 Performance Series Remote Reservoir smooth body shock delivers FOX's industry leading and race dominating performance in an affordable, hassle-free bolt on package. Its external reservoir allows for increase oil and nitrogen capacity while delivering striking race look.The race developed high flow damping piston matched with application specific valving provides the 2.0 Performance Series Reservoir shock a predictable ride quality capable of handling the roughest road conditions.. Cognito 20-24 Chevy/GMC Silv/Sierra 2500/3500 HD 2WD/4WD 3in Premier Leveling Kit w/ Fox PSRR 2.0. Allows for up to a 35 x 12.5-Inch Tire on a 9-inch Wide Wheel with 5-inch backspacing. Cognito 3" Premier Leveling Kit w/ Fox 2.0 Reservoir 2020 GM 2500HD/3500HD Truck. Maintains adequate droop travel to optimize ride quality. PISK improves drivability, fuel economy, and tire wear. Cognito Ball Joint SM Series Upper Control Arm Kit. Fox 2.0 Performance Series Remote Reservoir Shocks. Cognito Pitman and Idler Arm Support Kit. Cognito Torsion Bar Adjuster Key Kit. .5-inch Front Shock Extender Kit. Yields 3 inches of front lift. Improved ball joint angle. 5-hour DIY install time. Suspension Lift Kit. Made in the USA

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