We've bundled everything you need in a leveling kit for your 20-21 Silverado/Sierra 2500/3500 2WD/4WD with high quality Cognito components. There is no guesswork.

The Cognito Standard upper control arms are built with a modified ball joint angle to eliminate travel limitations of the ball joint in lifted applications. Upgrade your stock upper control arms with Cognito Standard Control Arms for better performance, style and function.

Ample droop travel is required for optimal ride quality and all suspension components to last and work properly. The allowable droop travel is also improved with the design of these arms.

Cognito Torsion Bar Keys levels the front with the rear of the truck. Their forged construction makes them practically indestructible and they bolt in for easy installation.

The Cognito 1-inch Block and U-Bolt Kit includes 1-inch tall powder coated semi-gloss black cast steel blocks and heavy-duty zinc plated U-bolts. Made in the USA.

Each Kit Features:

• Yields 3 inches of front lift
• Cognito Ball Joint Standard Upper Control Arm Kit
• Torsion Bar Adjuster Key Kit
• Front shock spacer kit
• Cognito Block and U-Bolt Kit yields 1-inch of rear lift
• Improves vehicle appearance and reduces nose-down rake
• Improved ball joint angle
• Maintains adequate droop travel to retain ride quality
• Fits up to a 35x12.5-inch tire on a 9-inch wide wheel with 5.75-inch backspacing
• 4 hour DIY install time
• Made in the USA