Dirt King 4130 Upper Control Arms | Toyota 4Runner 2025-2026

The Dirt King 4130 Upper Control Arms are engineered to solve common suspension issues encountered when lifting or upgrading a truck’s front end. These arms replace stock units with a precision‑welded 4130 chromoly tube design that offers excellent strength and durability for daily driving, overlanding, rock crawling, or desert trails. The build includes maintenance‑free SilentSpin™ bushings that eliminate the need for grease fittings and unwanted noise, as well as heavy‑duty Probearing Pro 4 ball joints with sealed dust caps, designed for high articulation and long‑lasting performance. These arms help maintain proper alignment from 0–3″ of lift, and they also provide roughly an inch of additional downward travel compared to stock arms — especially beneficial when paired with aftermarket shocks and coilovers.

Built and tested in the USA, these 4130 upper control arms arrive preassembled for a faster, hassle‑free installation and are fully rebuildable, so wear components can be replaced when needed — extending service life and maximizing durability on rugged terrain.

Specifications

• Amount of Lift: Allows for 0-3” of lift
• Track Width: Stock
• Maximum Backspacing: 5.75”
• Minimum Rim Size: 17”

What's Included

• 4130 Chromoly upper control arms
• Probearing SilentSpin Hybrid bushings
• Probearing Pro 4 Superior Performance Ball Joints
• Ball joint caps
• Dirt King sticker pack

Features

• Pro 4 Series Ball Joints – Forged SAE4140 housing, 38° of articulation, and induction-hardened ball stud for maximum strength and smoother steering feel
• SilentSpin Hybrid Bushings – Maintenance-free, greaseless, and engineered for quiet, free-spinning articulation
• Geometry Corrected – Improved caster and pivot angles deliver better handling and control with up to 3” of lift
• 4130 Chromoly Construction – Built with high-strength tubing and reinforced gussets for extreme durability
• Fully Rebuildable Design – All wear items are replaceable for long-term reliability
• Corrosion-Resistant Finishes – Zinc-plated hardware and black powder coat protect against the elements
• Professionally MIG Welded – Ensures structural integrity for demanding off-road use
• Preassembled – Quick, hassle-free installation with no guesswork
• Made in the USA – Built with pride and quality you can trust

Compatibility

Toyota 4Runner 2WD / 4WD 2025+

This product is designed to pair with OEM and Dirt King parts. Compatibility with other brands must be approved by the respective manufacturer.

Installation

Installation begins by removing the factory shackle and hanger components and aligning the Dirt King hangers and shackles with the frame and leaf spring eyes. Use the supplied Grade 8 mounting hardware to secure the new components, ensuring that the hanger tab faces are square and the shackles pivot freely. If you opted for the cross brace, install it between the hangers per the included instructions to add rigidity. Torque all fasteners to spec and check movement through full suspension articulation before completing the installation