Dirt King 4130 Upper Control Arms | GMC Sierra 3500 HD (2020-2025)

The Dirt King 4130 Upper Control Arms are engineered to fix common suspension issues like squeaky bushings, excessive maintenance, and geometry problems that arise when lifting a truck. Constructed with precision-welded 4130 chromoly tubing, these arms provide strength and durability whether you’re daily driving, overlanding, rock crawling, or hitting desert terrain. Featuring maintenance-free SilentSpin™ bushings and heavy-duty Probearing Pro 4 ball joints, this kit offers smooth articulation, long life, and improved performance over stock arms.

Designed to maintain proper alignment through 0–3″ of lift, these arms also offer about an inch of additional downward travel compared to factory components — especially beneficial when paired with aftermarket shocks and coilovers from brands like King, Fox, and Icon. Built in the USA and shipped preassembled, they reduce install time and deliver dependable service on both street and trail.

With corrosion-resistant finishes and fully rebuildable wear items, these control arms are a long-term upgrade you can trust to withstand off-road abuse while retaining on-road composure.

Specifications

• Amount of Lift: Allows for 0–3” of lift
• Track Width: Stock
• Maximum Backspacing: 5.75”

What’s Included

• 4130 Chromoly upper control arms
• Probearing SilentSpin Hybrid bushings
• Heavy-duty Probearing Ball Joints
• Ball joint caps
• Dirt King sticker pack

Features:

• Pro 4 Series Ball Joints – Forged SAE4140 housing, 76° 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

GMC Sierra 3500 HD 2020+

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

Not compatible with coilover conversion kits.

Installation

The 4130 Upper Control Arms install by replacing the factory arms using the supplied hardware and maintain factory mounting points. Because they ship preassembled, you can bolt them in place quickly — but always follow proper torque specifications and have a professional alignment performed after installation. While no major modifications are required, it’s recommended to verify compatibility with your existing suspension setup and shocks prior to installation.