Pro Comp 90-40139 Steering Knuckle Suspension Lift Kit Component

The Pro Comp 90-40139 is a replacement steering knuckle designed as a direct-fit component for Pro Comp suspension lift kit systems. Engineered specifically for Dodge truck applications, this knuckle integrates seamlessly into Pro Comp's lift kit architecture, allowing for proper suspension geometry and wheel alignment when running lifted ride heights.

As a core structural element of the front suspension, the steering knuckle serves as the pivot point connecting the wheel hub, ball joints, and tie rod ends. Pro Comp's knuckle is manufactured to exacting tolerances to ensure precise fit and function, whether used as an original kit component or as a direct replacement part.

Key Features:

• Direct-fit design for Pro Comp suspension lift kit systems
• Engineered for Dodge truck applications requiring lifted suspension geometry
• Accepts OE-style ball joints and tie rod ends for straightforward installation
• Compatible with CV axle and differential housing fitment requirements
• Manufactured to Pro Comp's quality standards for durability in on- and off-road use
• Sold individually — verify driver or passenger side position before ordering

When installing, torque the knuckle mounting bolts to 125 ft./lbs. and the lower ball joint to 60 ft./lbs. as specified in Pro Comp's installation documentation. Always confirm this part number matches your specific Pro Comp lift kit to ensure correct fitment.