Upgrade your Chevy Silverado or GMC Sierra 2500HD / 3500HD (2WD & 4WD) with a complete, no-guesswork leveling kit engineered for ride quality, steering durability, and long-term performance. This bundled system combines premium Cognito components with FOX 2.0 Performance Series Remote Reservoir shocks—all designed to work together for proper geometry and predictable handling. Cognito components are engineered, manufactured, and assembled in the USA.

• Cognito SM Series Ball Joint Upper Control Arm Kit

• Cognito Forged Torsion Bar Adjuster Keys

• Cognito Pitman & Idler Arm Support Kit (PISK)

• FOX 2.0 Performance Series Remote Reservoir Shocks (Front & Rear)

• Front shock spacers to maximize droop travel

• All required mounting hardware

The Cognito SM Series Ball Joint Upper Control Arms are purpose-built for lifted and leveled GM HD trucks. They correct ball joint angles, increase usable droop travel, and add a slight caster increase for improved high-speed highway stability and drivability.

• Boxed sheet-metal construction

• Fully welded with semi-gloss black powder coat

• Pre-installed, maintenance-free ball joints and pivot bushings

• True bolt-on installation

Proper droop travel is critical for a smooth ride and for ensuring suspension components last and function as intended.

Pitman and idler arm wear has long been a weak point on GM HD steering systems. The Cognito PISK (Pitman & Idler Arm Support Kit) uses a patented design to add critical support to the pitman and idler arms, eliminating forward and rearward center-link movement that causes premature wear. The result is improved steering precision, durability, and confidence, especially with larger tires or added ride height.

Finish the setup with FOX 2.0 Performance Series smooth-body remote reservoir shocks, delivering race-developed performance in an affordable, hassle-free bolt-on package.

• External reservoirs increase oil and nitrogen capacity

• Improved heat dissipation for consistent damping under load

• High-flow race-developed damping piston

• Application-specific valving for predictable on-road comfort and off-road control

• Striking race-inspired appearance

These shocks are engineered to handle rough roads, heavy use, and demanding conditions while maintaining a controlled, comfortable ride.