Description

Dirt King 4130 Upper Control Arms – Built to Solve Real Problems

If you drive a 2023+ Canyon or Colorado ZR2/Trail Boss and you're ready for a suspension upgrade, these 4130 UCAs are for you. We made them to tackle the exact issues we kept running into ourselves—squeaky bushings, joints that need constant attention, and geometry thrown off as soon as you add a lift. Whether you’re daily driving, overlanding, rock crawling, or chasing desert trails, these UCAs handle it all.

These arms feature maintenance-free SilentSpin™ bushings that eliminate grease fittings and unwanted noise, along with heavy-duty Probearing Pro 4 ball joints for high articulation and superior strength. The ball joints are sealed to block out debris and finished with anodized caps. Built to maintain proper alignment from 0–3" of lift, these arms also add roughly an inch of down travel compared to stock, a must-have when paired with aftermarket coilovers like King, Fox, Icon, and more.

Why Go Dirt King?

SilentSpin™ bushings — no squeaks or maintenance
Pro 4 ball joints with sealed dust caps
Rebuildable, USA-made construction
Precision-welded 4130 chromoly tubing
Shipped preassembled for faster installs

Upgrade With Confidence
Built and tested in the USA, these 4130 UCAs are engineered for the long haul—perfect for rigs that work hard on weekdays and explore even harder on weekends. It’s the last set of upper control arms you’ll ever need.

Specifications

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

Note: Do not install with coil spacers combined with extended-length aftermarket shocks.

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

Instructions

Compatibility

2023+ Colorado Trail Boss & ZR2
2023+ Canyon AT4, AT4X, Denali, & Elevation

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

15-26 Colorado

Upper Control Arm Stickers

4130 Upper Control Arms