Fabtech 20-21 GM K2500HD 3.5in Uniball UCA Kit w/Stealth

Built with .120-inch wall, 1.50-inch outer diameter 4130 Chromoly tubing, these upper control arms from Fabtech are a solid upgrade for your 2020-2021 GM 2500 HD or 3500 HD truck. They replace the factory upper control arms and ball joints with a robust Uniball setup, offering increased wheel travel and an extra degree of caster compared to stock. This improved caster helps with alignment, especially when you're running larger tires, and contributes to a more positive feel on the road.

The kit includes 1-inch FK Stainless PTFE-lined Uniball bearings, which are known for their durability in tough offroad conditions. The Uniball design eliminates the factory upper ball joint and uses a 17-4 Heat treated Uniball pin that fits directly into the factory spindle taper, making it possible to return the vehicle to stock configuration if needed. Forged torsion bar keys are also part of the kit, allowing for additional ride height adjustment to complement the new control arms and achieve a more level stance front to rear. This system is designed to work with Fabtech's Stealth shocks, which are sealed monotube units featuring a Nitrocarb piston rod for corrosion resistance and protection against rock chipping, providing a good balance of highway comfort and offroad damping.

This 3.5-inch lift system is a comprehensive package designed to add strength and reliability to your truck's suspension while giving it a commanding presence. The billet Uniball caps help keep dirt and debris out of the Uniball assembly, and .250-wall DOM bushing barrels with welded gussets add further strength to the arms. You'll gain the ability to run up to 35-inch tall tires, enhancing your truck's offroad capabilities and aggressive look.